3 years ago

Someone help with 17 and 18 please

Mathematics

1 answer:

Alja [10]3 years ago

6 0

Answer: i think its − but i am answering question 18 hold on

−

Step-by-step explanation: 2

−

2−2x−8−9x

−

You might be interested in

(50 points for best and correct answer ASAP no steps needed) A family is building a rectangular fountain in the backyard. The ya

Pie

Answer:

A) 34x²

Step-by-step explanation:

6x * 7x = 42x²

2x * 4x = 8x²

42x - 8 x = 34x²

5 0

3 years ago

an office building is 5 times as tall as a house. if the difference in their height is 100, how tall is the building

nalin [4]

Answer: 20

20 since you have to divide 100 by 5 which equals 20 since you have to use the inverse operation of multiplication which is division.

Hope this helps!

5 0

3 years ago

The mean of 7 numbers is 15. When an 8th number is added the mean decreases to 12. What is the 8th number?

ale4655 [162]

Answer:

The 8th number is -9

Step-by-step explanation:

With an average, the sum of the seven numbers divided by 7 is 15.

In order to add an 8th number, we set up

$\frac{7*15+x}{8}=12\\105 + x = 96\\x = -9\\\\\frac{105-9}{8}=\frac{96}{8}=12$

3 0

4 years ago

A submarine starts at the surface of the Pacific Ocean and descends 60 feet every hour. What integer expresses the submarine's d

LiRa [457]

-60*6 is what, -360 feet

7 0

3 years ago

Read 2 more answers

I need help!! i just need the equation that’s all, i’ll give brainliest

11111nata11111 [884]

Answer:

(x²-16x)

Step-by-step explanation:

thats all just multiply then

7 0

3 years ago