Answer:
D. A discrete data set because there are a finite number of possible values
Step-by-step explanation:
If in a test of a method of gender selection, 725 couples used the XSORT method and 368 of them had baby girls. Therefore, this is a discrete data set because there are a finite number of possible values.
A discrete data is a data set in which the number of possible values are either finite or countable.
For continuous data, there are infinitely many possible values in the data set and those values are uncountable, meaning they cannot be counted.
In this scenario, 725 couples used the XSORT method and 368 of them had baby girls. Therefore, this is a discrete data because the values (725 and 368) are finite and can be counted.
Can someone please help me I really need help it’s my last question
Answer:
x^2+11x+30
Step-by-step explanation:
This is a parallelogram.
Area of a parallelogram can be found with:
A=bh
Plug our values in.
A=(x+6)(x+5)
FOIL-
First: x*x=x^2
Outside: x*5=5x
Inside: 6*x=6x
Last: 6*5=30
x^2+5x+6x+30
Combine like terms.
x^2+11x+30
Find the solution of this system of equations
- 2x + 10y = -22
-2x - 4y = 6
Answer:
x = 1, y = -2
Step-by-step explanation:
- 2x + 10y = -22 _______(1)
-2x - 4y = 6 _______(2)
From (1),
10y + 22 = 2x
x = (10y + 22) / 2
x = 5y + 11 .______(3)
Substitute (3) into (2),
-2 ( 5y + 11) -4y = 6
-10y - 22 - 4y = 6
-14y = 6 + 22
-14y = 28
y = 28/ -14
y =-2
Substitute y = -2 into (3).
x = 5y + 11
x = 5(-2) + 11
x = -10 + 11
x = 1
Therefore, the solution is x = 1, y = -2.
The revenue from selling x shirts is f(x) = 15x.
The cost of buying x shirts is c(x) = 7x + 20.
The profit from selling x shirts is p(x) = f(x) - cx).
What is p(x)?
Answer:
p(x) = 8x - 20
Step-by-step explanation:
revenue from selling x shirts is f(x) = 15x
The cost of buying x shirts is c(x) = 7x + 20
p(x) = f(x) - c(x)
To solve this, we need to substitute value of f(x) and c(x) in formula for p(x)
p(x) = f(x) - c(x)
p(x) = 15x -( 7x + 20)
=> p(x) = 15x - 7x -20
=> p(x) = 8x -20
Thus, profit is p(x) = 8x - 20.
PLZ HURRY How many solutions does this system have? y = 3 x minus 5. y = negative x + 4.
Answer:
one is correct.
Step-by-step explanation:
because it have one solution when you graph it
Answer:
One solution (2.25,1.75)
Step-by-step explanation:
Well first we need to graph the following
[tex]y=3x-5[/tex]
[tex]y=-x+4[/tex]
So look at the image below.
So looking at the image below we can tell that the system only has one solution (2.25,1.75).
Please please urgently helpp❤️
Find the product of the following.
i) –5a2bc, 6ab, 8abc2
ii) –3x2y and (5y – xy)
iii) x2y2z2 and (xy – yz + zx)
iv) (p+6)and (q–7)
v) (2x+7)and(x2 –5x+6) vii) (x + y + 5) and (2x – 2y – 3)
PLEASE I NEED THE ANSWER NOW
Answer:
i) -240[tex]a^{4}b^{3} c^{3}[/tex]
ii) -15x²y² + 3x³y²
iii)x³y³z³ - x²y³z³ + x³y²z³
iv) pq -7p+6q-42
v)9x²-33x +42
vii) 2x² - 2y² + 7x -13y - 15
Step-by-step explanation:
To find product here means to multiply the algebraic expressions together
i) (–5a²bc)×(6ab)×(8abc² )
multiply like terms together
= -240[tex]a^{4}b^{3} c^{3}[/tex]
ii) (–3x²y) ×(5y – xy)
(–3x²y)×(5y) – (–3x²y) ×(xy)
multiply like terms together
multiplication of same sign gives +, while that of opposite sign gives -
= -15x²y² + 3x³y²
iii) (x²y²z²) ×(xy – yz + zx)
(x²y²z²)×(xy) – (yz)× (x²y²z²) + (zx) ×(x²y²z²)
multiply like terms together
multiplication of same sign gives +, while that of opposite sign gives -
= x³y³z³ - x²y³z³ + x³y²z³
iv) (p+6)and (q–7)
p(q–7) +6(q–7)
multiply like terms together
multiplication of same sign gives +, while that of opposite sign gives -
= pq -7p+6q-42
v) (2x+7)and(x² –5x+6)
multiply like terms together
multiplication of same sign gives +, while that of opposite sign gives -
= 2x² -10x+12x+7x²-35x+42
collect like terms
= 9x²-33x +42
vii) (x + y + 5) and (2x – 2y – 3)
multiply like terms together
multiplication of same sign gives +, while that of opposite sign gives -
= 2x²-2xy-3x+2xy-2y²-3y+10x-10y-15
collect like terms
= 2x² - 2y² + 7x -13y - 15
Find the length of the side labeled x. Round intermediate values to the nearest tenth. Use the rounded values to calculate the next value. Round your final answer to the nearest tenth.
Answer:
11.67
Step-by-step explanation:
Data given in the question
∠ADC = 42°
∠BAC = 68°
Let us assume that AC be Y
Now
In ΔACD
tan 42° = AC ÷ CD = Y ÷ x ...............................(i)
In ΔACB
tan 68° = BC ÷ AC = 26 ÷ Y ..........................(ii)
Now take the value of Y from the equation (ii)
Y = 26 ÷ Tan 68° ...................... (iii)
Now place the value of Y in equation (i)
So,
Tan 42° = 26 ÷ tan 68° × X
X = 26 ÷ tan 68° × Tan 42° ......................(iv)
Now placing the values of tan 42° and tan 68° in equation (iv)
So,
X = 26 ÷ 0.900 × 2.475
= 11.67
The tan 42° = 0.900
And, the tan 68° = 2.475
What is the shape of the cross section of the figure that is perpendicular to the rectangular base but does not pass through the top vertex? A Rectangular Pyramid. parellogram that is not a rectangle a rectangle a triangle a trapezoid
Answer:
(E)A trapezoid
Step-by-step explanation:
Given the shape which is a rectangular based pyramid.
A cross-section is cut but it does not pass through the top vertex of the pyramid.
The shape formed will have two parallel unequal sides (the base and the top)However, the other two sides will be slant.Therefore, the shape which describes the cross-section will be a trapezoid.
Answer:
The figure is a rectangular pyramid. The cross section is perpendicular to the rectangular base and passes through the top vertex of the figure. A triangle that does not have the same dimensions as one of the faces is formed.
Step-by-step explanation:
PLEASE HELP!!!! BRAINLIEST FOR RIGHT ANWSER
Answer:
d.tigers have a great IQR because they were some very heavy tigers.(high outliers)
Classify the following triangle.Check all that apply
Answer:
B and D
Step-by-step explanation:
=> All of the sides are unequal so it's a scalene triangle.
=> It have a 90 degrees angle, so it is a Right Angled Triangle.
Answer:
B. Scalene
D. Right
Step-by-step explanation:
The triangle is a scalene triangle, because all the three sides have different lengths.
The triangle is a right triangle, because it has an angle of 90 degrees.
Please Help...Anyone? I am revising for a test tomorrow, so please explain how you get the answer, too.. The ratios of the ages of Sunil and his Wife is 4:3. After 4 years, the ratio will be 9:7. What is the present age of Sunil
Answer:
32 years old
Step-by-step explanation:
Please see attached picture for full solution.
Let Sunil's present age be 4x and his wife's present age be 3x.
Last year Peter spent a total of 8 1/6 hours on community service. Visits to old folks' homes made up 4/7 of the total time. How much time did he spend in visiting old folks homes?
B) This year Peter plans to spend 1 1/5 of his time spent last year on community service.
(i) Find the time he will spend on community service.
(ii) How much more time will he spend this year than last year?
Answer:
A. 4 2/3 hours
B. (i) 9 4/5 hours
(ii) 1 19/30
Step-by-step explanation:
Firstly, to find the number of hours he used in visiting old folks, what we have to do is to multiply the fraction of hours he used by the total number of hours.
Mathematically, that would be;
4/7 * 8 1/6
8 1/6 is same as 49/6
So the number of hours he spent visiting old folks would be ;
49/6 * 4/7 = 14/3 = 4 2/3 hours
B. What we do here is simply multiply the fraction now by what he spent last year.
That would be 1 1/5 * 8 1/6 hours
= 6/5 * 49/6 = 49/5 = 9 4/5 hours
ii) Now we want to know how much more time will be spent this year than last year.
What to do here simply is to subtract the time taken last year from what we have this year
That would be;
49/5 - 49/6 = 49/30 = 1 19/30
a set of five numbers has a mode of 24 a median of 21 a mean of 20 . work out what the numbers could be
Answer:
Step-by-step explanation:
The mode is 24 so we know that at least 2 of the 5 numbers are 24.
The mean is 20 so we know that the 5 numbers add up to 100.
The median is 21 so the third number is 21.
100-(24+24+21)= 31
Now, I am pretty certain that the last 2 numbers can be anything as long as they add up to 31 AND they are not also 21 because 24 then would no longer be the mode.
E.g. 24, 24, 21, 11 & 20
Kevin and Emily Johnson pay $1,375 for monthly rent. Emily lost her job and the couple needs a less expensive apartment. They rented a new apartment for $950 per month. If the cost of moving was $275, find their savings the first year if they move to a new apartment.
Step 1) Solve for the amount of money Kevin and Emily used to spend in a year for rent
1375 x 12 = 16500
Step 2) Solve for the amount of money Kevin and Emily spend in a year now for rent
(950 x 12) + 275 = 11675
Step 3) Subtract the new amount of money per year from the old amount of money per year to find the savings in the first year
16500 - 11675 = 4825
Kevin and Emily will save $4,825 the first year if they move to a new apartment.
Hope this helps!! :)
PLS HELP ASAP! A decoration is packed in a box shaped like a cube. The decoration has a volume of 651 cm3. Approximately how much empty space remains in the box?
This question is incomplete.
Find attached to this question the diagram of the cube.
Reference for the attached image: This diagram was obtained from Education Quality and Accountability Office (EQAO) PDF
Answer:
128cm³
Step-by-step explanation:
The diagram of the box shows it has a side length of 9.2cm
Volume of a cube =( Length)³
Volume of a cube =( 9.2cm)³
= 778.688cm³
We are told in the question that the decoration packed in the cube has a volume of 651 cm³.
The amount of empty space remaining in the box is calculated as:
778.688cm³ - 651cm³
= 127.688cm³
Approximately to the nearest whole number = 128cm³
A truck covers a distance of 150 km at a certain average speed and then covers another 200 km at an average speed which is 20 km per hour more than the first speed. If the truck covers the total distance in 5 hours, find the speed of the truck.
Answer:
Since the speed can't be negative it was 60 km/h for the first stage and 80 km/h on the second stage, averaging 70 km/h for the whole course.
Step-by-step explanation:
The speed of the truck for the first stage of the route is "x" km/h, while on the second one it raises to "x + 20" km/h. The time it takes to complete each stage is shown below:
[tex]t_{stage 1} = \frac{150}{x}\\t_{stage 2} = \frac{200}{x + 20}[/tex]
The sum of these times must be equal to the total time of the trip, therefore:
[tex]t_{stage1} + t_{stage2} = 5[/tex]
[tex]\frac{150}{x} + \frac{200}{x + 20} = 5\\\frac{150*(x + 20) + 200*x}{x(x + 20)} = 5\\150*x + 3000 + 200*x = 5*x*(x + 20)\\5*x^2 + 100*x - 350*x - 3000 = 0\\5*x^2 - 250*x - 3000 = 0\\x^2 - 50*x - 600 = 0\\x_{1,2} = \frac{-(-50) \pm \sqrt{(-50)^2 - 4*1*(-600)}}{2*1}\\x_{1,2} = \frac{50\pm \sqrt{2500 + 2400}}{2}\\x_{1,2} = \frac{50\pm \sqrt{4900}}{2}\\x_{1,2} = \frac{50 \pm 70}{2}\\x_{1} = 60\\x_{2} = -10[/tex]
Since the speed can't be negative it was 60 km/h for the first stage and 80 km/h on the second stage, averaging 70 km/h for the whole course.
can someone in here help me with this question I'm stuck and I don't know to do it
Answer:
Substitute -3,-2,-1,0,1,2,3 in d equation given to u at first to complete the table
Which pair shows equivalent expressions?
Answer:
2(2/5x+2)=4x/5+4
Step-by-step explanation:
2(2/5x+2)=4x/5+4
4x/5 +4=4x/5 +4
436486346349234x98^5/5679ex45+423234723+sqaure root of 34248234824827468246278 If you answer, your are a god.
Answer:
your mom
Step-by-step explanation:
get rekt
Can i have brainliest
The correlation coefficient between the two quantitative variables is approximately 0.006. What does the value of this correlation coefficient indicate about how well the model fits the data? A.) The model is a good fit. B.) The correlation coefficient is not within the correct range. C.) The model is not a good fit. D.) No conclusion can be drawn regarding how well the model fits the data
The answer is C.) The model is not a good fit.
What is the Square root of -100
Answer:
[tex]10i[/tex]
Step-by-step explanation:
√(-100)
Use the imaginary number rule [tex]i=\sqrt{-1}[/tex]
√(-1) × √(100)
i × √(10²)
i × 10
= 10i
Answer:
It does not have a square root because it is a minus digit.
Step-by-step explanation:
The square root of one number is the number which is multiplied by itself to form the square number.
But, no negative number has a square root, because
- x - = +
+ x + = +
As you can see, no two same signs multiply together to form a negative.
Hope this helps.
Good Luck
A little help would be nice :')
Answer:
(2,6)
Step-by-step explanation:
x+2y = 14
y = x+4
Substitute x+4 into the first equation for y
x+2(x+4) = 14
Distribute
x+2x+8 = 14
3x+8 = 14
Subtract 8 from each side
3x+8-8 = 14-8
3x = 6
Divide by 3
3x/3 = 6/3
x = 2
Now solve for y
y = x+4
y =2+4
y =6
(2,6)
Answer:
D. (2, 6)
Step-by-step explanation:
Put y as x+4 in the first equation and solve for x.
x + 2(x + 4) = 14
x + 2x + 8 = 14
3x = 14 - 8
3x = 6
x = 2
Put x as 2 in the second equation and solve for y.
y = 2 + 4
y = 6
Find the area of the shape shown below Please help :(
Answer:
18 units^2
Step-by-step explanation:
Formula for Area of trapezoid: ( base 1 + base 2 / 2) * height
(3 + 9 / 2) * 3 = (12 / 2) * 3 = 6 * 3 = 18 units^2
I hope this helps
Answer:
18²
Step-by-step explanation:
Formula for a trapezium:
Area = base1 + base2/2 × height
3 + 9/2 × 3
= 12/2 × 3
18²
When constructing parallel lines with a compass and straightedge, how should you start the construction? Measure the length of the original line and make an arc. Create a line that intersects the given line with your straightedge. Open the compass to the width of the line and draw two arcs. Use a straightedge to create two arcs above and below the line.
Answer:
The second choice.
Step-by-step explanation:
Open the compass to the width of the line and draw two arcs.
These arcs should be on the same side of the original line.
You can then draw the parallel line with the straight edge just touching the top of each arc.
Parallel lines can be drawn using compass and straightedge using the concept of corresponding angle.
What are the parallel lines?Two lines are called parallel when they never meet each other if they are increased on the either side of them.
When constructing parallel lines with a compass and straightedge we can follow the below mentioned steps.
1. At first we need to draw a straight line. Then take a random point on it.
2. After that, we need to take a random point above the line that is drawn. Then, we need to connect two points.
3. After that, draw two arcs using the compass. First arc is on the angle formed by two lines drawn. The next arc is on the line that connects two points.
4. Now using the compass, we can copy the angle formed on the first line on the point above the first line.
5. Now, complete the angle on the point above the first line. These two lines are parallel lines.
Learn more about parallel lines here: https://brainly.com/question/1418314
#SPJ2
HURRY PLEASE HELP Which quadratic function fits the three points (1, −2), (2, −2), and (3, −4)? A. y = x2 − 3x − 8 B. y = x2 + 3x − 4 C. y = −x2 − 4x + 4 D. y = −x2 + 3x − 4
Answer:
D
Step-by-step explanation:
If we plug in the points to A, not all 3 of them work so A is not the answer. If we repeat this process with the other functions we see that the answer is D.
The school aims to raise a minimum of $5,250 after paying for all the expenses. If the school collects $50 per guest and chooses a venue that can seat not more than 150 guests, what is the minimum number of children that must attend the event?
At least 105 children must attend the event
two angles of a triangle measure 32 degrees and 62 degrees what is the measure of the third angle? A) 76 degrees B) 86 degrees C) 94 degrees D) 96 degrees
Answer:
86 B
Step-by-step explanation:
32+62=94
180-94=86
The sum of the interior angles of a triangle always add up to 180 degrees.
Answer:
The third angle is 86
Step-by-step explanation:
The sum of the angles of a triangle add to 180
32+62+x = 180
94+x = 180
Subtract 94 from each side
x = 180-94
x =86
The following are the ages (years) of 5 people in a room: 12, 19, 24, 21, 21 A person enters the room. The mean age of the 6 people is now 25. What is the age of the person who entered the room?
Answer:
53
Step-by-step explanation:
x - the age of the person who entered the room.
(12 + 19 + 24 + 21 + 21 + x)/6 = 25
12 + 19 + 24 + 21 + 21 + x = 150
97 + x = 150
x = 53
Answer:
53
Step-by-step explanation:
Which is true about the solution to the system of inequalities shown? y > 3x + 1 y 3x + 1 are solutions. Only values that satisfy y 3x + 1 or y < 3x – 3 are solutions. There are no solutions.
Answer:
The correct option is;
There are no solutions
Step-by-step explanation:
From the graph of the inequality, with the y-intercept = 1 and slope = 3 for the blue shaded inequality
The equation is y > 3x + 1
While that of the other red shaded inequality, the slope is 3 and the y-intercept = -3
The equation is y < 3x - 3
Given that the two inequalities are parallel line that their domains do not overlap, we have that there are no solutions as the y-coordinate values of y > 3x + 1 are always larger for a given x-coordinate value than the y-coordinate value of y < 3x - 3.
Answer:
No solution is correct.
Step-by-step explanation:
I took the test
show your work
PLEASE!
Hey there! :)
Answer:
x = 12.
Step-by-step explanation:
Given:
[tex]\frac{3}{5} = \frac{x}{20}[/tex]
Cross multiply to solve for x:
3 · 20 = 5 · x
60 = 5x
Divide by 5:
12 = x.
Answer:
so x=12
Step-by-step explanation:
[tex]\frac{3}{5}=\frac{x}{20}\\ by cross multiplication[/tex]
3×20=5×x
60=5x
dividing 5 on both sides
60/5=5x/5
x=12
i hope this will help you :)