Its Math. Ireally need help. Please say what percent you think your right. i.e. 50% 100%?

Question

Simplify.
1. 8(-3)
_______ that's a fraction
2

2.(-5)(-2)(-2)-(-6)(-3)

3. 2/3(1/2)-(-3/2) (-2/3)

4. 70x-30y
_________
-5

5.7
____
-2/5

6.3/4(8x+12y)- 5/7(21x-35y)

7. translate r=(a-b)to the third power into a verbal sentence.

8.Define a variable and write an equation for the following problem. Do not solve.
Each week for several weeks, Save-a-buck store reduced the price of a sofa by$18.25. The original price was $ 380.25. The final reduced price was $252.50. Ror how many weeks was the sofa on sale?

Answer 1

1. -24/2=-12

2.-20-18
=-2

3. 1/3-1
=-2/3

4. -14x+6y

5. -35/2
=-17 1/2

6. 6x+9y-15x+25y
=-9x+34y

7. The difference of a and b raised to the third power

8. 380.25-n(18.25)=252.50

The sofa was on sale for 7 weeks

Answer 2

1) (8*-3)/2 = -8*3/2 = -24/2 = -12.

2) -5*-2*-2 - -6*-3 = -20 - 18 = -38.

3) 2/3 * 1/2 - -3/2 * -2/3 = 2/6 - 1 = -4/6 = -2/3.

4) (70x - 30y)/5 = 70x/5 - 30y/5 = 14x - 6y.

5) 7/(-2/5) = 7 * -5/2 = 7*-5/2 = -35/2 = -17 1/2.

6) 3/4(8x + 12y) - 5/7(21x - 35y) = 3*8x/4 + 3*12y/4 - (5*21x/7 - 5*35y)/7) = 6x + 9y - (15x - 25y) = 6x + 9y - 15x + 25y = 34y - 9x.

7) R equals the cube of the difference between a and b?

8) W = number of weeks. P = price. P = $380.25 - $18.25W. P = $252.50, solve for W. 252.50 = 380.25 - 18.25W.

I'm 100% sure of all of them except 7 and 8. I'm not entirely sure what the teacher is looking for in the verbal sentence one, and I'm never sure when to stop on those "do not solve" problems.

Answer 3

1.-24/2=-12

2.-20-18
=-2

3.1/3-1
=-2/3

4.-14x+6y

5.-35/2
=-17 1/2

6.6x+9y-15x+25y
=-9x+34y

7.the difference of a and b raised to the third power
or
the third power of the difference of a and b

8.let the no of weeks be n
the equation is
380.25-n(18.25)=252.50
or
380.25-252.50=n(18.25)
or
n=(380.25-252.50)/18.25

the sofa was on sale for 7 weeks

Answer 4

1. -24
2. -2
3. -4/6=-2/3
4. 14x-6y
5. -35/2=-17 1/2
6. -9x+34y
7. r=(a-b)^3 (not sure what your looking for)
8. 380.25 -X18.25=252.50
therefore 380.25 -252.50=X18.50
therefore 127.75=X18.50
therefore X=127.75/18.50

Answer 5

1) -12
2) -38
3) I'm assuming that was (2/3)(1/2)-(-3/2)(-2/3), so the answer is -2/3
4) -14x+6y or 6y-14x
5) -35/2
6) -9x+36y or 36y-9x
7) R is the cube of the quantity a-b
8) w = number of weeks

380.25-18.25w=252.5

I'm 100% sure

Answer 6

1. -12
2. -38
3. -2/3
4. -14x+6y
5. -17.5
6.-9x+31y
7.r equals a minus b quantity cubed
8. 380.25-252.50=18.25x

assuming i understood what you meant, im 99% sure, although i might have made an algebra mistake in my head.

Answer 7

1. -12
2. 360
3. -2/3
4. 2(3y-7x)
5. -17 1/2
6. -9x + 34y

Answer 8

8000 the physique of techniques is easy divide the given variety by a hundred and then multiply by the given %(on your ques it quite is 8) the respond to your question is going as follows: divide a hundred,000 by a hundred --- this provides one thousand multiply one thousand by 8---this provides 8000