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3 years ago

9

Find the exact value of cos –150°.

1 answer:

galina1969 [7]3 years ago

3 0

Answer:

-0.866

Step-by-step explanation:

cos(–150°) = -0.866

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To what power must you raise the expression 7^1/2 to get 7 as the result?

Anvisha [2.4K]

Answer:

2

Step-by-step explanation:

(7^1/2)^2=7^(1/2*2)=7

4 0

2 years ago

Use the distributive property to solve the equation.<br> 2 (x – 9) = 10

scoundrel [369]

Answer:

x = 14

Step-by-step explanation:

Hi,

To begin, distribute the 2 to the x and -9.

So...

2 ( x - 9 ) = 10

2x - 18 = 10

2x = 28

x = 14

I hope this helps :)

5 0

3 years ago

Easy question i will mark braineliest

Yuki888 [10]

Answer:

<h2>0.67</h2>

Step-by-step explanation:

$5(y - 3.8) = 4.7(y - 4)$

Distribute 5 through the parentheses

$5y - 19 = 4.7(y - 4)$

Distribute 4.7 through the parentheses

$5y - 19 = 4.7y - 18.8$

Move ' 4.7 y ' to L.H.S and change it's sign

$5y - 4.7y - 19 = - 18.8$

Move constant to R.H.S and change it's sign

$5y - 4.7y = - 18.8 + 19$

Collect like terms

$0.3y = - 18.8 + 19$

Calculate

$0.3y = 0.2$

Divide both sides of the equation by 0.3

$\frac{0.3y}{0.3} = \frac{0.2}{0.3}$

Calculate

$y = 0.67$

Hope this helps...

Best regards!!

3 0

3 years ago

Read 2 more answers

A rock is dropped from a height of 25 feet. The function h=-16t^2 +25 gives the height h of the rock after t seconds. When does

scZoUnD [109]

Answer:

5 seconds

Step-by-step explanation:

The ground is 25 eet, so 25=-16t^2+400

-16t^2=-400, 16t^2=400

t^2=25, dividing both sides by 16

t=5 seconds.

3 0

3 years ago

I cant write it on here do pls look at the picture i provided

liq [111]

Answer:

that is an addition sign the correct answer is B

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers