Step-by-step explanation:
remember, when you multiply 2 expressions, you need to multiply every term of one expression with every term of the other expression and then add the results up (while considering their individual signs, of course).
1)
2(s + 8) = -(4s + 2)
2×s + 2×8 = -4s + -2
2s + 16 = -4s - 2
6s + 16 = -2
6s = -18
s = -3
2)
-(8 - 7b) = 6(2 + b)
-8 - -7b = 6×2 + 6×b
-8 + 7b = 12 + 6b
-8 + b = 12
b = 20
3)
6(4x - 11) = 9 - x
6×4x - 6×11 = 9 - x
24x - 66 = 9 - x
25x - 66 = 9
25x = 75
x = 3
4)
-5(4 - x) = 2(-x - 3)
-5×4 - -5×x = 2×-x - 2×3
-20 + 5x = -2x - 6
-20 + 7x = -6
7x = 14
x = 2
5)
-6(y - 1) = 4(9 + y)
-6×y - -6×1 = 4×9 + 4×y
-6y + 6 = 36 + 4y
-10y + 6 = 36
-10y = 30
y = -3
6)
7(2s + 6) = 5(s - 6)
7×2s + 7×6 = 5×s - 5×6
14s + 42 = 5s - 30
9s + 42 = -30
9s = -72
s = -8
7)
z + 4 = 8(-z + 5)
z + 4 = 8×-z + 8×5
z + 4 = -8z + 40
9z + 4 = 40
9z = 36
z = 4
8)
-2(3 + 5x) + 3(1 - x) = 10
-2×3 + -2×5x + 3×1 - 3×x = 10
-6 - 10x + 3 - 3x = 10
-3 - 13x = 10
-13x = 13
x = -1
Answer:
480
Step-by-step explanation:
The answer is A because the x has different numbers
So according to question one the answer is nobody know but points are wanted and same for all answers. No but seriously download Socratic and take a picture it gives you the answer and shows work 100% better than brainly
You need to set a variable to represent the width, let's say "w'.
width = w
length (l) = 20 + w
Area = length * width
A = (20 + w) * w
See how I substituted the length in terms of w, above? We also know the area, so plug that in:
A = (20 + w) * w
1500 = (20 + w) *w
Solve for w. If it's easier, rewrite as:
1500 = w(20 + w)
Distribute the right side, and solve for w (width).
Then plug back into the equation for length --> length = 20 + w to find the other dimension