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blagie [28]
3 years ago
14

What do i do in this​

Mathematics
1 answer:
Leviafan [203]3 years ago
3 0

Answer:

113

Step-by-step explanation:

area of a trapezoid: 1/2 (A+B)h

A is base 1 and B is base 2; h is height

so we have two trapezoids; we just need to add them together

trapezoid 1: ((7+14) x 6)/2

21 x 6 = 126/2 = 63

trapezoid 2: ((10+10) x 5)/2

20 x 5 = 100/2 = 50

50 + 63 = 113

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In Spring 2017, data was collected from a random selection of STA 2023 students. One of the questions asked how many hours they
Arte-miy333 [17]

Answer: 0.22

Step-by-step explanation:

We know that the best point estimate for the difference between two population mean is the difference between their sample means.

Given : For the 39 randomly selected upperclassmen, the sample mean was 0.12 and sample standard deviation was 0.42. For the 35 randomly selected underclassmen, the sample mean was 0.34 and the sample standard deviation was 0.87.

Let A denotes the population of upperclassmen and B denotes the population of underclassmen .

\overline{x}_A=0.12

\overline{x}_B=0.34

Then, the point estimate of the difference in the population mean volunteered between underclassmen and upperclassmen will be :-

\overline{x}_B-\overline{x}_A=0.34-0.12=0.22

Hence, the point estimate of the difference in the population mean volunteered between underclassmen and upperclassmen =0.22

5 0
3 years ago
What is 153/4 as a whole number
maw [93]

\frac{4}{3}  =  \frac{51}{n} \\  =  >  \frac{3}{4}   =  \frac{n}{51 }  \\  =  > n =  \frac{3}{4}  \times 51 \\  =  > n =  \frac{153}{4}  \\  =  > n = 38 \frac{1}{4}

Hope you could get an idea from here.

Doubt clarification - use comment section.

6 0
2 years ago
I NEED HELP ASAPP!!!​
Llana [10]

Answer:

c

Step-by-step explanation:

x - 2y = -8 \\y = 5x-2

x - 2 y = - 8

add -x to both sides

x - 2y - x = -8 - x \\- 2y = -8 - x

multiply both sides by -1/2

-2y * (\frac{-1}{2} ) = (-8-x) (\frac{-1}{2} )

y = 4 + \frac{x}{2} \\y = \frac{x}{2} + 4

the equations don't have the same slope so they aren't parallel

The solpes product doesn't equal -1 so they aren't perpendicular

4 0
3 years ago
PLEASE HELP!!!
viktelen [127]

The answer is 3/5.


\frac{1}{3} *\frac{3}{5} =\frac{3}{15} \\ \\ \frac{3}{15} *\frac{3}{5} =\frac{9}{75}


Continue this pattern and you'll see that it follows this geometric sequence

5 0
3 years ago
Read 2 more answers
What is the product of (5y-3)^2
Airida [17]

Answer:

\sf 25y^2-30y+9

___________

\sf Solve

  • Expand the expression using the factors within the range of <em>y</em>.

___________

5 0
2 years ago
Read 2 more answers
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