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3 years ago

Please help with this im really confused and please explain abit with words. please and thanks!

Mathematics

1 answer:

Hatshy [7]3 years ago

5 0

Step-by-step explanation:

just add all the given angles and equate it with 540° and then find x

x/2 + x/2 + x - 25 + 100 + x - 15 = 540°

3x + 60 = 540°

3x = 540 - 60

x = 480/3

x = 160°

on checking, the given shape values of x-25 and x - 15 are both still obtuse angles thus the answer is correct.

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Anuta_ua [19.1K]

Answer:

If you are talking about the rectangular prism the equation is

2 × L × W + 2 × L × H + 2 × W × H

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B × H + L × S + L × B + L × C

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3 years ago

Help with this problem?

ankoles [38]

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2 years ago

Martin throws a ball straight up in the air. the equation h(t) = -16t^2 + 40t + 5 gives the height of the ball, in feet, t secon

Lisa [10]

Answer:

2.62 seconds

Step-by-step explanation:

Let

t ----> the time in seconds

h(t) ----> he height of the ball, in feet

we have

$h(t)=-16t^2+40t+5$

we know that

When the ball hits the ground, the height is equal to zero

$-16t^2+40t+5=0$

The formula to solve a quadratic equation of the form

$at^{2} +bt+c=0$

is equal to

$t=\frac{-b\pm\sqrt{b^{2}-4ac}} {2a}$

in this problem we have

$-16t^2+40t+5=0$

$a=-16\\b=40\\c=5$

substitute in the formula

$t=\frac{-40\pm\sqrt{40^{2}-4(-16)(5)}} {2(-16)}$

$t=\frac{-40\pm\sqrt{1,920}} {-32}$

$t=\frac{-40+\sqrt{1,920}} {-32}=-0.12\ sec$

$t=\frac{-40-\sqrt{1,920}} {-32}=2.62\ sec$

therefore

The solution is t=2.62 seconds

4 0

2 years ago

What is 9/11 +2/3 and show the work

andrey2020 [161]

Answer:

25/33

Step-by-step explanation:

1) find the least common denominator (LCD)

The LCD of 11 and 3 is 33

Multiply 9/11 by 3/3

You can do this because you are basically multiplying 9/11 by 1, (3/3 = 1)

See file below for steps

6 0

2 years ago

Use a number line to find the quotient <br> 3/5 divided by 3/10<br> (———————————)

frutty [35]

Answer:

2 ( plot the answer on 2)

Step-by-step explanation:

We do the reciprocal of 3/10 because we are dividing fraction. Which would be 10/3. Change the sign to multiplication because we are dividing fractions. And multiply regularly. SO it would be 3/5 times 10/3 = 2

5 0

3 years ago