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hoa [83]
2 years ago
6

-8(-8b-6)=-6b-22 Can someone PLEASE help me I don't understand this at all!!

Mathematics
1 answer:
lina2011 [118]2 years ago
7 0

Do you know the distribution property? I can't explain why you have to do that, but google search it. the number that is outside of the parenthesis will be multiplied in <em>each </em>of the number in the parenthesis.


-8(-8b-6) = -6b-22

the distribution property will look like this

-8 * -8b = 64b

-8 * -6 = 48

(two negative numbers make a positive)

now th equation will look like this

64b + 48 = -6b-22

you must have the variable to one side of the equation. That means you need to subtract one of them to the other side or add it depending if the number is positive or negative. For example, you can add 6b to 64b (the opposite operation of -6b is addtion making -6b a positive number) so 64b + 6b - 70b


70b + 48 = -22

solve b!

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You want to know the factor by which 3 2/3 is multiplied to get 7 1/3.

1. You can estimate that it is 2 from 7/3 ≈ 2, then check by multiplication to see if that is right.
.. 2*(3 2/3) = 6 4/3 = 7 1/3 . . . . 2 is the correct factor.

2. You can divide 7 1/3 by 3 2/3 to see what the factor is.
.. (7 1/3)/(3 2/3) = (22/3)/(11/3) = 22/11 = 2 . . . . 2 is the factor Earl used.

3. You could see how many times you can subtract 3 2/3 from 7 1/3.
.. 7 1/3 -3 2/3 = (7 -3) +(1/3 -2/3) = 4 -1/3 = 3 2/3 . . . . . subtracting once gives 3 2/3
.. 3 2/3 -3 2/3 = 0 . . . . . . subtracting twice gives 0, so the factor is 2.

4. You could add 3 2/3 to see how many times it takes to get 7 1/3.
.. 3 2/3 +3 2/3 = (3 +3) +(2/3 +2/3) = 6 +4/3 = 7 1/3
We only need to add two values of 3 2/3 to get 7 1/3, so the factor is 2.

___
We have shown methods using multiplication, division, subtraction, addition. Take your pick.
6 0
3 years ago
Five less than twelve times a number is represented by:
Paraphin [41]

Option ( 1 )

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If a circle has a diameter of 30 meters, which expression gives its area in
sattari [20]

Answer:

C. 15²π

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Geometry</u>

  • Diameter: d = 2r
  • Area of a Circle: A = πr²

Step-by-step explanation:

<u>Step 1: Define</u>

d = 30 m

<u>Step 2: Find Area</u>

  1. Substitute [D]:                    30 m = 2r
  2. Isolate <em>r</em>:                             15 m = r
  3. Rewrite:                              r = 15 m
  4. Substitute [AC]:                 A = π(15 m)²
  5. Rearrange:                        A = 15²π
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Answer:

the location of Y is 9.5

Step-by-step explanation:

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