Solve the system of equations by graphing on your own paper. What is the x-coordinate of the solution? {y=x+7. y=-2x-11

Answers

Answer 1
Answer: x = -7     y=-7 + 7
x = -5 1/2    y=-2(-5 1/2) - 11

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HELP PLSS I WILL GIVE U MANY POINTS!Question 27 options:
If the side lengths of a square are increased by 300%,

a) How many times as large are the enlarged square's sides compared to the sides of the original, smaller square?

Answers

3 times larger because 300% is 3 times.

What is the number of edges in a pyramid with seven faces

Answers

There would be 12 edges in a 7-sided pyramid. 
There would be 7 vertices in this pyramid, each point.

(2a2 + a + 3) ÷ (a - 1)

Answers

Final answer is: 5a+3/a-1
Answer: 5a+3/a-1

Key: “/“ is a fraction bar
Key: 5a+3 is the numerator
Key: a-1 is the denominator

Hope this helps! <3

I got 4.9 and 40 i dont know if im right

Answers

Answer:

I got 40 aswell

Step-by-step explanation:

A piano has white keys and black keys in the ratio of 13 : 9. If there are 52 white keys,how many black keys are there?

Answers

Answer: 9/36 

- - Why?

Because if you look at it like this:

(13)/(52) =  (9)/(36)

- 52 being the white and 36 because the black.

✡Hope this helps



Let w = white and b = black.
Using the proportion,
13/w = 9/b
Since w = 52 white keys, therefore
13/52 = 9/b
b = 36 black keys

Anybody please help me :( on my last question

Answers

Answer:

B

Step-by-step explanation: