Question

Who knows how to do a and d ?

Answer 1

Lets solve by parts numerator and denominator.

a)

Numerator:

-| 5^2 - 6^2|

-| 25 - 36|

-|-11|

-11

Denominator:

5^3 = 125

(-8)^2 = 64

-2(7) = 14

125 - 64 - 8 - 14

39

Answer = -11/39

b)

Numerator:

3 - 7/10

30/10 - 7/10

23/10

Denominator:

5/12 - 7/8 + 17/10

400/960 - 840/960 + 1632/960

1192/960 = 298/240 = 149/120

Answer = (23/10) / (149/120)

(23/10) * (120/149)

(23*120) / (10*149)

276 / 149

Answer 2

A. -x-3(x-1) = x-2
Distribute -3 through the parenthesis
-x-3x+3 = x-2
Collect like terms
-4x + 3 = x-2
Move variable to the left side and change its sign
-4x + -x +3= -2
Move constant to the right side and change its sign
-4x - x= -2-3
collect like terms
-5x = -2-3
calculate the difference
-5x = -5
Divide both sides equal by -5
x= -1

B. 9x + 1/5-8x-7/10-4x/5
Calculate the difference
1/5x + 1/5 - 1/10
Subract the fraction
1/5x - 1/2