The combination of beads that the student will use to make a model of magnesium hydroxide, Mg(OH)₂ is
Magnesium orange beads - 1Oxygen green beads - 2Hydrogen blue beads - 2What is model of molecule?Molecule models depict the positions of the various atoms, roughly to scale, and typically with color coding, as well as how they are joined together.
These models are helpful tools for visualizing the structures and shapes of groupings of atoms, which is vital for understanding the behavior of molecules
Over the course of the development of contemporary atomic theory, models have been employed to represent atom configurations.
The model of magnesium hydroxide, Mg(OH)₂ will require the atoms in the ratio:
Magnesium : Oxygen : Hydrogen = 1 : 2 : 2
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The graph of x=6(y+6)^2+1 is a parabola with vertex (−6,1) and opening to the right.
answer options:
By the definition of the vertex form of the quadratic equation x - 1 = 6 · (y + 6)² has its vertex at (h, k) = (- 6, 1) and opens to the right. (Correct choices: A, B)
How to determine the features of a quadratic equation
In this problem we find the definition of a quadratic equation in vertex form, whose axis of symmetry is parallel to the x-axis. This form of quadratic equation is described below:
x - h = C · (y - k)²
Where:
(h, k) - Coordinates of the vertex.C - Vertex constant.
Please notice that the parabola opens to the right (+ x direction) when the vertex constant is greater than 0. By direct inspection, we have the following conclusions:
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what is the equation for a line that passes through (3.4) and 4,9
The equation of the line in slope-intercept form that passes through (3, 4) and (4, 9) is: y = 5x - 11.
How to Find the Equation of a Line?The equation of a line can be written in point-slope form as y - b = m(x - a), if we know the slope (m) and a point (a, b) on the line. It can be rewritten to the slope-intercept form as y = mx + b.
Given the points on a line:
(3, 4) and (4, 9)
Slope of the line (m) = change in y / change in x = (9 - 4)/(4 - 3)
Slope of the line (m) = 5/1
m = 5
To write the equation of the line, substitute m = 5 and (a, b) = (3, 4) into y - b = m(x - a):
y - 4 = 5(x - 3)
Rewrite in slope-intercept form:
y - 4 = 5x - 15
y = 5x - 15 + 4
y = 5x - 11 [equation of the line]
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What is the solution of this inequality?
r−6>−11
Drag and drop the choices to correctly complete the inequality.
help
The solution to the given linear inequality, r - 6 > -11, is r > -5
Solving Linear InequalitiesFrom the question, we are to determine the solution of the given inequality
The given inequality is
r - 6 > -11
To determine the solution of the inequality, we will solve the inequality for the unknown variable.
In the inequality, the unknown variable is r.
Solving the inequality for r
r - 6 > -11
Add 6 to both sides
r - 6 + 6 > -11 + 6
r > -5
Hence, the solution is r > -5
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Carson measured a line to be 2.2 inches long. If the actual length of the line is 2.3 inches, then what was the percent error of the measurement, to the nearest tenth of a percent?
The percentage is calculated by dividing the required value by the total value and multiplying by 100.
Required percentage value = a
total value = b
Percentage = a/b x 100
The percentage error of the measurement is 47.8%.
What is a percentage?The percentage is calculated by dividing the required value by the total value and multiplying by 100.
Example:
Required percentage value = a
total value = b
Percentage = a/b x 100
Example:
50% = 50/100 = 1/2
25% = 25/100 = 1/4
20% = 20/100 = 1/5
10% = 10/100 = 1/10
We have,
The actual length of the line = 2.3 inches
The measured length of the line = 2.2 inches
The error length of the line.
= 2.3 - 2.2
= 1.1 inches
The percentage error of the measurement.
= 1.1/2.3 x 100
= 47.8%
Thus,
The percentage error of the measurement is 47.8%.
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Three years ago, Jerry purchased a condo. This year his monthly maintenance fee is $1,397. Twenty percent of this fee is for Jerry’s property taxes. How much will Jerry pay this year in property taxes?
Answer: $279.40
Step-by-step explanation:
To find how much he is paying in property taxes, you have to multiply the maintenance fee by the percentage you are given, so
1,397×20%=279.40
Answer:
$3,352.80
Step-by-step explanation:
This is the correct answer
A 9-inch candle burns down in 12 hours. At what rate does the candle burn, in inches per hour?
(Pls help)
Answer: 0.75 inches per hour
Step-by-step explanation:
9/12=0.75
0.75 x 12 = 9
0.75 inches per hour
Answer: 4.5 hours.
Step-by-step explanation:
Use a proportion.
3 3/8 = 3.375
9 inch is to 12 hours as 3.75 inches is to x hours.
9/12 = 3.375/x
3/4 = 3.375/x
3x = 4 * 3.375
x = 4 * 1.125
x = 4.5
Answer: 4.5 hours
y-5x 7x + xy x = 0 and y = 4
Answer:
x(7y)x(7y)
Step-by-step explanation:
The given expression: 7(xy)7(xy)
i.e. a product of 7 and xy.
The operation used here: Multiplication.
Commutative property of multiplication :-
a\times b=b\times aa×b=b×a for any numbers a and b.
Associative property of multiplication :-
a\times(b\times c)=(a\times b\times c)a×(b×c)=(a×b×c) for any numbers a , band c.
Now, 7(xy)=(7x)y7(xy)=(7x)y [Associative property of multiplication]
=(x7)y=(x7)y [Commutative property of multiplication]
=x(7y)=x(7y) [Associative property of multiplication]
Lisa received 20% discount on a video game she bought. The discount was $5. What is the
regular price of the video game?
a line with a slope of 7 passes through the point (-2,-9). what is its equation in slope-intercept form?
Answer: y=7x-5
Step-by-step explanation: Use the points to find the equation of y-(y1) = m (x- and x1)
The slope is 7. and x1 and y1 is (2,9)
Here is y-9=7 is (x-2). Then y-9=7 is (x-2)]
Multiply 7x-2, then you get y-9=7x-14 then now we got y=7x-5! :)
And adult plate costs $8
A child plate costs $5
Total plates sold is 272
Total value is $1,933
How many of each plate were sold?
191 of adult plates and 81 child plates were sold.
What is Equation?Two or more expressions with an Equal sign is called as Equation.
Given,
Adult plate costs A= $8
Child plate costs C=$5
Total plates sold is 272
A+C=272..(1)
8A+5C=1,933..(2)
C=272-A
Substitute in equation 2
8A+5(272-A)=1933
8A+1360-5A=1933
1360+3A=1933
Subtract 1360 on both sides
3A=1933-1360
3A=573
Divide both sides by 3
A=191
Now substitute A value in 1
191+C=272
Subtract 191 on both sides
C=272-191
C=81
Hence, 191 of adult plates and 81 child plates were sold.
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URGENT 50 POINTS + BRAINLY
What is the sum of the infinite geometric series?
25 minus 10 plus 4 minus eight fifths plus continuing
The series diverges.
five halves
fifty sevenths
one hundred twenty-five sevenths
eighty-seven fifths
Answer: [tex]C. \frac{125}{7}[/tex]
Step-by-step explanation:
1. Find the sum of the infinite geometric sequence:
[tex]S = \frac{125}{7}[/tex]
2. Find the correct option:
C
A new corporation has established itself and is set to start selling shares of stock. On the first day, you purchase 100 shares of stock at $23.00 per share. Three years later, you sell the stock for $45.00 per share.
a. How much did you net from the sale?
b. Was this a capital gain or a capital loss?
a) The net for the sale is: $4,500
b) The capital gain is $2,200
How much did you net from the sale?
We know that you had 100 shares, now the value of each of these is $45.00, then the amount that you make if you sell the 100 shares is:
S = 100*$45.00 = $4,500
How to get the capital gain?The capital gain is the difference between the amount we found above and the amount you paid for the shares.
The price of the shares was $23.00, then the amount you paid is:
C = $23.00*100 = $2,300
Then the capital gain is:
g = $4,500 - $2,300 = $2,200
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Evaluate 25 - 4x when x = 2 and when x = 3. Which gives you the larger value and
what is that value?
O x = 2 will give you the larger value of 17.
O x = 3 will give you the larger value of 63.
O x = 2 will give you the larger value of 42.
O x = 3 will give you the larger value of 13.
Answer:17
Step-by-step explanation:
Substitute: 25-4x2
Calculate the product or quotient: 25-8
Calculate the sum or difference: 17
Answer: 17
can anyone help me? I don't know the answer.
Answer: 27/70
the area of the shaded rectangle
Step-by-step explanation:
9/10 and 3/7 of the rectangle are shaded on top and bttom. So you multiple this together and you will get 27/70
9/10 x 3/7 = 27/70
Write an equation in slope-intercept form of the line given:
Answer: y=-x
Step-by-step explanation:
Choose 2 coordinates: (-2,2) and (2,-2)
Let us find the slope m:
[tex]\displaystyle\\m=\frac{y_2-y_1}{x_2-x_1} \\\\x_1=-2\ \ \ \ \ x_2=2\ \ \ \ \ y_1=2\ \ \ \ \ y_2=-2\\\\m=\frac{-2-2}{2-(-2)} \\\\m=\frac{-4}{2+2} \\\\m=\frac{-4}{4} \\\\m=-1\\[/tex]
Hence,
y=-x+b
To find the coefficient b, choose any coordinate belonging to the given line, for example (-2,2):
2=-(-2)+b
2=2+b
0=b
Hence, b=0
Thus, y=-x
Using the simplex tableau solve for the LPP.
Objective function z=x1+2x2
Constraints
2x1 + x2<8
X1 + x2 <5
X1,x2>0
The values of the objective function obtained for the given set of equation is 7.
Define the term LPP?The goal of the Linear Programming Problems (LPP) is to determine the best value for a given linear function. The ideal value may be either the highest or lowest value. The specified linear function is regarded as an objective function in this situation.For the stated question-
Objective function z = x1+2x2
Constraints
2x1 + x2<8 ....eq 1x1 + x2 <5 ....eq 2x1, x2>0 .....eq 3Subtract equation 2 from 1.
x1 = 8 - 5
x1 = 3
Put value if x1 in eq 2
x1 + x2 = 5
x2 = 5 - 3
x2 = 2
Put the values of x1 and x2 in Objective function
z = x1 + 2x2
z = 3 + 2x2
z = 7
Thus, the values of the objective function obtained for the given set of equation is 7.
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Find the values of x and y.
x + 2 = 3y
The number of solution of the equation x + 2 = 3y will be infinite for the infinite value of 'x'. The solution is (1, 1).
What is the solution to the equation?The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.
A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.
The linear equation is given below.
x + 2 = 3y
There is only one equation, so we have to assume 'x'.
If x = 1, then the value of the variable 'y' is given as,
3y = 1 + 2
3y = 3
y = 3 / 3
y = 1
Similarly, the number of solution of the equation x + 2 = 3y will be infinite for the infinite value of 'x'.
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Which expression represents "10 subtracted from the quotient of 3 and a number"?
Answer:
Step-by-step explanation:
[tex]\frac{3}{n}[/tex] - 10.
The quotient of 3 and a number translates to [tex]\frac{3}{n}[/tex], then, all you have to do is subtract 10 from that value, giving the expression above.
PQTU and PRSU are rectangles.
PU = 11 cm
PQ = 4 cm
QR = 3 cm
Work out
perimeter PQTU: perimeter PRSU
Give your answer in its simplest form
The value of the ratio of the perimeters of the rectangles PQTU and PRSU is 30:36, that is 5:6.
Define Perimeter.The perimeter of a form is the space surrounding its edge. Find the perimeter of various forms by summing the lengths of their sides.
Equation for perimeter of a rectangle (P) =2 (l + w), where l is the length and w is the width.
In the question, length of rectangle PQTU= 11cm
Width of rectangle PQTU= 4 cm
Perimeter of rectangle PQTU= 2( 11+4)
= 2 x 15
= 30 cm
The length of the rectangle PRSU= 11cm
The width of the rectangle PRSU= PQ + QR
= 4+3 = 7
The perimeter of the rectangle PRSU= 2(11+7)
= 36 cm
Therefore, perimeter of PQTU: perimeter of PRSU = 30:36
Dividing by 6 on both= 30/6 :36/6 = 5:6
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4. For the following write the converse , inverse, contrapositive and biconditional.
If studying helps your grade, then studying also hurts your grade.
Is the conditional true or false?
Is the converse true or false?
Is the bi-conditional true or false?
The converse, inverse, contrapositive and biconditional for the given sentences has been written down for a better understanding.
What are inverse statements?Two assertions that are logically opposed to one another are referred to be inverse statements. An inverted statement would be "It is raining" and "It is not raining."Biconditional statements can be both true and untrue depending on the veracity or falsity of each of its component elements. For instance, "If it is raining, then the ground is wet" is a biconditional statement because if it is raining, the ground will be wet, and if it is not raining, the ground won't be wet. In other words, the truth or falsehood of the first part (it is raining) determines the truth or falsehood of the second part.
How to solve?
Converse: If studying hurts your grade, then studying also helps your grade.
Inverse: If studying does not help your grade, then studying does not hurt your grade.
Contrapositive: If studying does not hurt your grade, then studying does not help your grade.
Bi-conditional: Studying helps your grade if and only if studying also hurts your grade.
The conditional is false.
The converse is false.
The bi-conditional is false.
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If Malik has 4 times as many nickels as quarters and they have a combined value of 315 cents, how many of each coin does he have?
Set up your equation
4q + q = 315 Add (q = amount of quarters)
5q = 315 Divide
q = 63
Therefore he has 63 quarters.
To find the amount of nickels, multiply 4 and 63
4 x 63 = 252
Therefore he has 63 quarters and 252 nickels.
I hope this helps! :)
Which set of ordered pairs (x, y) could represent a linear function?
A = {(-6,9), (-3,6), (0,3), (4,0)}
B = {(1, 1), (2,3), (4,5), (5,7)}
C = {(-4,-4), (-2,-2), (1,0), (4,3)}
D = {(3,7), (5, 1), (6,-2), (7,-5)}
If the point D (-6, 9) is reflected over the x-axis, the coordinates of D’ would be?
Answer:
D'(-6, -9)
Step-by-step explanation:
When a point is reflected over the x-axis, the x-coordinate remains the same. The reflected point is the same distance from the x-axis as the original point, but it's on the other side of the x-axis, so the y-coordinate changes sign.
In general, point (x, y) reflected over the x-axis becomes point (x, -y).
Here, point D(-6, 9) becomes point D'(-6, -9).
What is 31+4 × [11-(1+3)] =
Answer:
59
Step-by-step explanation:
31+4 × [11-(1+3)]
31+4*[11-4]
31+4*(7)
31+28
59
The easy Answer is 59. When doing these types of questions remember:
Parentheses
Exponents
Multiplication
Divionsion
Add
Subtract
When Max moved to a
new school in 6th
grade, there were
only 3 other kids he
knew at the entire
school. There were
367 kids in the school.
What percentage of
kids did Max know?
Isaiah is a salesperson who sells computers at an electronics store. He makes a base pay amount each day and then is paid a commission as a percentage of the total dollar amount the company makes from his sales that day. The equation P=0.025x+85P=0.025x+85 represents Isaiah's total pay on a day on which he sells xx dollars worth of computers. What is the yy-intercept of the equation and what is its interpretation in the context of the problem?
Answer:
$85
Step-by-step explanation:
x=0 p= 85 => (0,85) {y-intercept}
p=0 x= -3400 => (-3400,0) {x-intercept}
y-intercept means Isaiah sells $0, then the company will pay him $85.
NO LINKS!! What are the true converses for each theorem?
Answers:
If the alternate interior angles are congruent, then the lines are parallel.If the alternate exterior angles are congruent, then the lines are parallel.If the corresponding angles are congruent, then the lines are parallel.If the consecutive interior angles are supplementary, then the lines are parallel.If the consecutive exterior angles are supplementary, then the lines are parallel.=====================================================
Explanation:
A conditional statement is of the form "if..., then..."
For example, "If it rains, then the grass gets wet" is a conditional statement.
We can have a basic template of "If P, then Q" to represent any conditional. The P and Q are placeholders for logical statements.
The converse of that conditional is "If Q, then P". We swap P and Q.
------------
So let's say we had this original conditional:
"If the lines are parallel, then alternate interior angles are congruent"The converse would be:
"If the alternate interior angles are congruent, then the lines are parallel"Similar ideas apply for the other converses as well.
Answer:
If alternate interior angles are congruent, then lines are parallel.
If alternate exterior angles are congruent, then lines are parallel.
If corresponding angles are congruent, then lines are parallel.
If consecutive interior angles are supplementary, then lines are parallel.
If consecutive interior angles are supplementary, then lines are parallel.
Step-by-step explanation:
Converse
The converse of a statement is formed by switching the hypothesis and the conclusion.
Hypothesis: The part after the "if".Conclusion: The part after the "then".-------------------------------------------------------------------------------------------------
Alternate InteriorGiven statement: If lines are parallel, then alternate interior angles are congruent.
Hypothesis: "lines are parallel"Conclusion: "alternate interior angles are congruent"Converse statement: If alternate interior angles are congruent, then lines are parallel.
Alternate ExteriorGiven statement: If lines are parallel, then alternate exterior angles are congruent.
Hypothesis: "lines are parallel"Conclusion: "alternate exterior angles are congruent"Converse statement: If alternate exterior angles are congruent, then lines are parallel.
CorrespondingGiven statement: If lines are parallel, then corresponding angles are congruent.
Hypothesis: "lines are parallel"Conclusion: "corresponding angles are congruent"Converse statement: If corresponding angles are congruent, then lines are parallel.
Consecutive InteriorGiven statement: If lines are parallel, then consecutive interior angles are supplementary.
Hypothesis: "lines are parallel"Conclusion: "consecutive interior angles are supplementary"Converse statement: If consecutive interior angles are supplementary, then lines are parallel.
Consecutive ExteriorGiven statement: If lines are parallel, then consecutive exterior angles are supplementary.
Hypothesis: "lines are parallel"Conclusion: "consecutive exterior angles are supplementary"Converse statement: If consecutive exterior angles are supplementary, then lines are parallel.
Select all the equations that represent a line passing through the point (5,-2) with a slope of 4.
Answer:
y = 4x - 22
Step-by-step explanation:
y = 4x + b
-2 = 4(5) + b
-2 = 20 + b
b = -22
y = 4x - 22
You have a carryover balance of $600 on a credit card that has a 18.99% annual percentage rate (APR). You have a recurring monthly purchase of $70 for your water bill and you make a payment of 7% of the ending balance is made each month. Complete the table below. Round each value to the nearest cent.
The completion of the credit card table is as follows:
Month Carryover Finance New Ending
Balance Charge Purchase Balance Payment
1 $600 $10.60 $70 $680.60 $47.64
2 $632.96 $11.12 $70 $714.08 $49.99
How are credit card finance charges computed?Credit card attracts finance charges.
The finance charges are the interest for using some credit to finance purchases.
Most finance charges are based on the annual percentage rate (APR), which may also be used to obtain the monthly percentage rate (MPR) by dividing the APR by 12.
The finance charge is applied to the unpaid balance at the end of the period, which may be daily, weekly, or monthly.
Carryover balance = $600
Annual percentage rate (APR) = 18.99%
Monthly percentage rate (MPR) = 1.5825% (18.99% ÷ 12)
Recurring monthly purchase = $70
Monthly payment = 7% of the ending balance
The finance charge for month 1 = $10.60 ($600 + $70 x 1.5825%)
Payment for month 1 = $47.64 ($680.60 x 7%)
Carryover balance for month 1 = $632.96 ($680.60 - $47.64)
The finance charge for month 2 = $11.12 ($632.96 + $70 x 1.5825%)
Payment for month 2 = $47.64 ($714.08 x 7%)
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When you apply the method to complete the square to find the solution to the equation
2x^2 +3x +3=4
What term should we sum/add on both sides of the equation?
A. 9
B. 9/4
C. 3/2
D. 9/16
Answer:
B
Step-by-step explanation:
x² + 3x + 3 = 4 ( subtract 3 from both sides )
x² + 3x = 1
to complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2( [tex]\frac{3}{2}[/tex] )x + ([tex]\frac{3}{2}[/tex] )² = 1 + ( [tex]\frac{3}{2}[/tex] )²
(x + [tex]\frac{3}{2}[/tex] )² + [tex]\frac{9}{4}[/tex] = 1 + [tex]\frac{9}{4}[/tex]
that is [tex]\frac{9}{4}[/tex] is added to both sides