MATHEMATICS MIDDLE SCHOOL

Simplify: $x(3x^2-2)-5(x^2-2x+7)$. Express your answer in the form $Ax^3+Bx^2+Cx+D.$

Answers

Answer 1
Answer: Here’s my answer, I can’t really type it so I took a picture
Answer 2
Answer:

Answer:

3x^3-5x^2+8x-35

Step-by-step explanation:

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A car traveled at a constant speed for 4 hours and covered 144.6 miles. It used 12 gallons of gas to travel this distance. How far did the car go in 1 hour? How far did the car travel on 1 gallon of gas?
Round 102.85 to the nearest tenth.

Someone please please please pleaseeeeee helppp meeee

Answers

10^2 + 7^2 = c^2
100 + 49 = c^2
149 = c^2
Square root of 149 = square root of c^2 ( cancels out the ^2)
C= square root of 149
1. 12.2
2. 8.9
3. 21.7
4. 13.9

The formula is a2 + b2 =c2.

You plug in the numbers and solve. C is always the hypotenuse of the triangle. You can use the legs as either a or b.

1.
10^2 + 7^2 =C^2
100 + 49 = C^2
149 = C^2
Then square root both sides to get 12.20.

2.
19 ^2 + b^2 = 21 ^2
361 + b^2 = 441

Subtract 361 from both sides

b ^2 = 80
Square root both sides
b=8.94

3.
16 ^2 + b ^2 = 27 ^2
256 + b ^2 = 729

Subtract 256 from both sides

b ^2 = 473
Square root both sides
b=21.74

4.
5.3 ^2+ 12.8 ^2 = c ^2
28.09 + 163.84 = c ^2
191.93=c ^2
Square root both sides to get
C=13.85

City Park is in the shape of a regular pentagon.Each side of the pentagon is 2/5 mile long.What is the perimeter of City Park?

Answers

so you have 5 sides you can add 2/5+2/5+2/5+2/5+2/5 = 10/5 = 2 miles around the park. Or you can multiply 5 sides (pentagon) times each side of 2/5 mile thus..... 5*2/5 = 10/5 = 2 so this is also 2 miles around the perimeter.

Please can someone tell me the answer

Answers

It affects the answer because parentheses signifies or implies that yoy are doing the operation inside of their that step comes first because if you forget about that step and move on it will affect your answer and you will get it wrong write this down
Hi there again! Anyways the answer is simple. The parenthesis r there for a reason. It is to show that that part is the one that u have to do first. So if the problem was (5-3)-1+2 u would have to do the parenthesis part first or u would get the wrong answer. I hope this helped u!

What is −9s−8 5s=−10

Answers

10

using the second equation you can get s=-2. then plugging that into the first you get 
-9(-2)-8 = 18-8 = 10

Mr.Pham wrote 2.619.Cristy says it is two and six hundred nineteen thousandths.Amy says its 2 ones 6 tenths 1 hundredths and 9 thousandths.Whos right. Explain.

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Cristy is right because after the decimal point it starts with the tenths place not the ones
Cristy is right cause she said 2 and six hundred nineteen thousandths. Ok and write a place value chart

3/11 as a decimal using long division

Answers


 you can divide the numerator by the denominator to get the decimal. So, divide 3 by 11 and you will get the decimal. You will get 0.27 as a decimal.  put a horizontal bar on top of 27 to indicate it is a repeating decimal.

Hope it helps :)
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