Answer:
y = 3
Step-by-step explanation:
substitute the x in 2x - y = 7 by x = 3y - 4 and then solve
2(3y - 4) - y = 7
Distribute the 2 into the parenthesis
6y - 8 -y = 7
combine like terms
5y - 8 = 7
add 8 on both sides
5y = 15
divide by 5 on both sides to isolate the y-value
y = 3
Please help. Fill in the blanks
Answer:
Step-by-step explanation:
1). 3x(2x - 2) = 3x(2x) + 3x(-2) [By distributive property]
2). x²(_ + 5x - 3) = (3)x² + x²(5x) + x²(-3)
3). _(x² - 3x + _) = x(x²) - (x)(-3x) + (x)(2)
4). (2x + 9)(x + 2) = 2x(x + 2) + 9(x + 2)
= 2x² + 4x + 9x + 18
= 2x² + 13x + 18
5). (z - 4)(2z + 1) = z(2z + 1) + (-4)(2z + 1)
= 2z² + z - 8z - 4
= 2z² - 7z - 4
can I please get help?!
Answer:
The answer is d.
Step-by-step explanation:
x is "a number." When a variable and a number are next to each other, they are being multiplied. So it's 7 times a number. Then you take the product of that and add 2.
So, d is the correct answer. :D
If P = 3x2 + xy - 5y? Q = 2x2 - xy + 3y2 and R = -6x2 + 4xy - 7y2?
what is P+Q-R?
Answer:
is this helpful tell me please if im correct :)
Answer:
[tex]P+Q-R=11x^2-4xy+10y^2[/tex]
Step-by-step explanation:
I'm assuming the 2's at the end of some of the terms are meant to be exponents. So here we have
[tex]P=3x^2+xy-5y\\Q=2x^2-xy+3y^2\\R=-6x^2+4xy-7y^2[/tex]
and we're asked to find P + Q - R. Let's handle these operations left to right to cut down on clutter. Starting with P + Q, our first job should be to combine all the like terms we can. 3x² + 2x² = 5x², and xy - xy = 0, but we still can't do anything with the terms -5y and 3y². So far, this gives us
[tex]P+Q=5x^2-5y+3y^2[/tex]
Now let's handle subtracting R from this sum. The pairs of like terms here are 5x² and -6x², and 3y² and -7y². Subtracting these parts gives us 5x² - (-6x²) = 11x² and 3y² - (-7y²) = 10y², and we can subtract off the remaing 4xy in R to give us
[tex]P+Q-R=11x^2-4xy+10y^2[/tex]
g(x)= x3 + 3x2
x² + 3x² + x
f(x) = x + 1
Find g( f(-3))
Answer:
GCF = x 2
x2 (x + 3)
A clothing store has sold $300 in shirts and plans to sell enough jeans to exceed its goal of $500. each pair of jeans cost $40.
Write a linear inequality to find how many pairs of jeans, j, the clothing store emplyees must sell.
Option 1 - 40j > 500 + 300
Option 2 - 40 > 500
Option 3 - 40j + 300 > 500
Option 4 - 40j + 300 <500
Answer:option 3
Step-by-step explanation:
What is the slope of the line that contains the point (3, 9) and (3, 4)?
A) 6/5
B) 6/13
C) Zero
D) Undefined
Answer:
D) Undefined slope
Step-by-step explanation:
Note that the x-coordinate (3) of both given points is 3. This means that the two points lie on a vertical line. The slope of a vertical line is undefined.
The correct answer is D) Undefined slope
Find the measure of the bold angle.- pls help
Answer:
I am not sure what your "bold angle" is, but x=8.
Step-by-step explanation:
5x+5+16x+7=180
21x+12=180
21x-12=180-12
21x=168
168/21=8
x=8
Solve each equation. Show your work
13a=-5
12−b=12.5
-0.1=-10c
Help me please........
Answer:
The answer is 15
Step-by-step explanation:
add 5 plus 2 equals 7 then divide 10 with 5 equals 2 then 2 times 2 times 2 equals 8 then you have your answer 8 plus 7 equals 15
and the reason I said 2 times 2 times 2 was because there is a 3 and you have to do that 3 times
Hope it helps plz give me brainlist
The following two triangles are similar. Find x.
Answer and Step-by-step explanation:
Since we know that the triangles are similar, we can find the value of x. It appears that the lighter triangle is dilated to be smaller than the darker triangle.
So, We would divide 45 by 9 to find the scale factor.
45 divided by 9 is 5.
Now, we divide 25 by this to find x.
25 divided by 5 is 5.
x is equal to 5.
#teamtrees #PAW (Plant And Water)
What kind of angles are 1 and 5 in the picture below?
Jan is 10 years younger than Michael. Jan is 65. How old is Michael?
HELP ME NOW!!
Answer:
75
Step-by-step explanation:
65 + 10 = 75
Which set of ordered pairs represent a function? {(2,6), (2, -5), (2,7), (2,5)}
{(4,0),(-10, -1),(-8,1),(4,9)}
{(3,5),(3, 10), (3, -9), (3, -5)
{(-6,8),(-6, -7), (-6,6),(-6, -2)
None of the above
Answer:
None of the above
Step-by-step explanation:
Please help me as soon as possible
Answer:
you will time 2 by 2 then 4 by 4 you get 4 and 16 the multipl
those So you get 64 inches is your anser
hi please help i’ll give brainliest please
Step-by-step explanation:
it will be 6×6×6 .
I wonder if 3×3×3×3×3×3 will count. I think it won't.
good day^^
help what is 5+5 i need this `in 1 minit
Answer:
10
Step-by-step explanation:
I hope you remember this. 5+5=10
H3LP HELP PLZ...... . . . ..
A system of linear equations has infinitely many solutions. What is known about the slopes and y-intercepts of the graphed equations? Explain your reasoning.
Answer:
The answer is below
Step-by-step explanation:
The graph of a linear function can be represented as:
y = mx + b;
where y and x are variables, m is the slope of the graph and b is the y intercept.
A system of linear equations has infinitely many solutions, when the lines overlap at every point. In other words, they're the same exact line, having the same equation when simplified.
This means that they have the same slope and y intercepts
Use the given graph to determine the limit, if it exists. A coordinate graph is shown with a horizontal line crossing the y axis at three that ends at the open point 2, 3, a closed point at 2, 1, and another horizontal line starting at the open point 2, -2. Find limit as x approaches two from the left of f of x. and limit as x approaches two from the right of f of x.. Does not exist; does not exist 1; 1 -2; 3 3; -2
Chloe used an inequality to model the number of minutes she has available to practice piano after school on Thursday.
The solution to her inequality is graphed below.
42 43 44 45 46 47 48 49 50 51 52
How should Chloe interpret this solution?
O She will have a minimum of 45 minutes available to practice.
O She will have a maximum of 45 minutes available to practice.
O She will have fewer than 45 minutes available to practice.
O She will have more than 45 minutes available to practice.
Answer:
b
Step-by-step explanation:
edge 2020-2021
(xoxo proud of you <3)
Question is in the picture
Answer:
y=1/3x -4
Step-by-step explanation:
3y-x=-12
y= 1/3x-4
m=1/3
(gradient is the same since its parallel)
y=mX+c
(2) = 1/3(18) + c
2 = 6 + c
2 - 6 = c
c= -4
(y-intercept)
Therefore: y=1/3x-4
1
Solve for x ( and V)
2
Show Your Work
14
48
X
Use pythagoras theorem
x² = 48² + 14²
x² = 2500
x = √2500
x = 50
convert 350 cm into meters
Answer:
3.5 meters
Step-by-step explanation:
Fill in each box with a ratio (aka fraction) that represents the Sin, Cos, or Tan for the angle
specified. (Hint: Soh Cah Toa) Next to each fraction, write it simplified in decimal form.
Please help I need to pass my class
Answer:
Step-by-step explanation:
sin(D) = [tex]\frac{\text{Opposite side}}{\text{Hypotenuse}}[/tex]
= [tex]\frac{7}{14}[/tex]
= [tex]\frac{1}{2}[/tex]
= 0.5
cos(D) = [tex]\frac{\text{Adjacent side}}{\text{Hypotenuse}}[/tex]
= [tex]\frac{12.124}{14}[/tex]
= 0.866
tanD = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]
= [tex]\frac{7}{12.124}[/tex]
= 0.577
Since, sinE = cosD
Therefore, sinE = 0.866
Since, cosE = sinD
Therefore, cosE = 0.5
Since, tanE = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]
= [tex]\frac{12.124}{7}[/tex]
= 1.732
One water filter will clean 40 gallons of water. Which equation can be used to find g, the total number of gallons cleaned by any number of filters f.
Answer: g = 40f
Step-by-step explanation:
Since one water filter will clean 40 gallons of water, the equation that can be used to find g, the total number of gallons that will be cleaned by any number of filters f will be gotten by multiplying f by 40. This will be:
g = f × 40
g = 40f
For example, the gallons of water that 4 water filters will clean will be:
= 40f
= 40 × 4
= 160 gallons
A store buys paper at $15 per bundle. It then sells the bundles at a price that includes a 40% markup. The store offers a discount of 1/10 off the price of each bundle if two or more bundles are purchased. What is the price to purchase 3 bundles of paper?? Plz help fast
Answer:
It would be C or 56.70
You deposit $5000 into an account that earns 6% annual interest. Fine the balance after 12 years when the interest is compounded monthly.
Graph the ellipse with equation x2/9+y2/16 = 1
Answer: Here you go!
How many moles of water are produced when 3.0 moles of hydrogen gas reacts with 1.8 moles of oxygen gas?
Balanced equation: 2H2 + O2 + 2H20
O 3.0 moles of water
O 3.6 moles of water
O 5.3 moles of water
O 7.0 moles of water
Answer:
3 moles of water are produced
Step-by-step explanation:
Find the limiting reactant
3.0 moles of H2 x (2 moles of H2O/2moles of H2)=3.0 moles of H20--limiting reactant, so this is the maximum amount of product that can be produced! Hope this helps
1.8 moles of O2 x (2 moles of H20/1 moles of O2)=3.6 moles of H20
3.6 moles of water are produced when 3.0 moles of hydrogen gas reacts with 1.8 moles of oxygen gas.
What is mole ?In chemistry, a mole is a unit of measurement used to quantify the amount of a chemical. It is defined as the amount of a substance containing Avogadro's number of entities (about 6.022 x [tex]10^{23[/tex]particles). The mole is a unit of measurement that is used to express the amount of a substance in terms of its molecular or atomic count. The mole is especially important in chemical reactions, where it is used to balance the number of atoms or molecules present in the reactants and products.
We have the balanced Equation:
2[tex]H_2[/tex] + [tex]O_2[/tex] ----> 2[tex]H_2O[/tex]
As, 3.0 moles of Hydrogen gas reacts with 1.8 moles of oxygen gas.
So, 1.8 moles of [tex]O_2[/tex] x (2 moles of [tex]H_2O[/tex] /1 moles of [tex]O_2[/tex])
= 3.6 moles of [tex]H_2O[/tex]
Also, 3.0 moles of Water is the limiting reactant.
Learn more about mole here:
https://brainly.com/question/26416088
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The velocity V of an object dropped from a tall building is given by V = V64d, where dis
the distance, in feet, the object has dropped. Find the distance when the velocity is
32 ft/sec.
Answer:
d = 0.0625 m
Step-by-step explanation:
The velocity of an object dropped from a tall building is given by :
[tex]v=\sqrt{64d}[/tex]
Where
d is the distance in feet
We need to find the distance when the velocity is 32 ft/s
Rearranging for d,
[tex]v^2=64d\\\\d=\dfrac{64}{v^2}[/tex]
Put v = 32 ft/s
[tex]d=\dfrac{64}{32^2}\\\\d=0.0625\ m[/tex]
So, the required distance is 0.0625 m.