3 years ago

What is the value of x?

Mathematics

1 answer:

Svetllana [295]3 years ago

7 0

Answer:

$\Huge\boxed{B.x=12}$

Step-by-step explanation:

Hello There!

They have given us each measure of a triangle's angles

Remember all of the angles in a triangle add up to equal 180

so we can use this equation to solve for x

180 = 2x + 5 + 6x - 5 + 7x

step 1 combine like terms

2x+6x+7x=15x

5-5=0

now we have 180 = 15x

step 2 divide each side by 15

180/15=12

15x/15=x

we're left with x = 12

You might be interested in

2. Solve by finding square roots. 9x^2 = 25

Verdich [7]

The answers B !!!!!!!

3 0

3 years ago

I could use some help doing this simple math problem lol.

alexira [117]

$D:k-9\geq 0 \wedge k\geq0\\
D:k\geq 9 \wedge k\geq0\\
D:k\geq 9\\
\sqrt{k-9}-\sqrt k=-1\\
\sqrt{k-9}=-1+\sqrt k\\
k-9=(-1+\sqrt k)^2\\
k-9=1-2\sqrt k+k\\
2\sqrt k=10\\
\sqrt k =5\\
k=25

$

7 0

3 years ago

Sonia uses $12.50 to buy a new journal. She has $34.25 left in her savings account. How much money did Sonia have before she bou

GalinKa [24]

So all you have to do to find out how much she had before is add up both value 12.50+34.25= 46.75$ (answer)

because y-12.50=34.25 so you would have to had the 12.5 to the other side to find the value of Y

3 0

3 years ago

I need help on 13 and 15 that all

mihalych1998 [28]

<span>Anna learns in her science class that the human eye blinks an average of 4,200,000 times a year. What is this number expressed in scientific notation?</span>

8 0

3 years ago

1/10 Florida land area of 1700000km2 Alaska

Agata [3.3K]

$1,700,000\times \frac{1}{10} = \frac{1,700,000}{10} = 170,000$

<span>Florida has a land area of 170,000 km^2</span>

4 0

3 years ago