Answer:
1. B
2. G
3. D
4. C
Step-by-step explanation:
1.
-(7x-8) = 2-5x
-7x + 8 = 2 - 5x
-2x + 8 = 2
-2x = -6
x = 3
2.
5(3+2x) = 10x-4
15 + 10x = 10x - 4
No Solution
3.
x+5 = (3x+13) / 2
x + 5 = 1.5x + 6.5
x = 1.5x + 1.5
-0.5x = 1.5
x = -3
4.
2 + 6x = 2(3x + 2) - 2
2 + 6x = 6x + 4 - 2
2 + 6x = 6x + 2
Infinite Solution
Answer=9
This question is asking how many times can 4 go into 36. Basically 36/4
36÷4=9
36 is 9 times greater than 4
81, you just type in a calculator 3^4 which would also equal 3x3x3x3
If y varies inversely as x, then we write it as:
y = k/x
where k is some constant.
If we multiply both sides of this equation by x we get an equation for k:
k = x*y
We are given that y=4 when x=7, therefore:
k = 7*4 = 28
Put this back into our original equation to get:
y = 28/x
2x + By = 15
We solve for y to put the equationj in the y = mx + b form in which b is the y-intercept.
By = -2x + 15
y = -2/Bx + 15/B
The y-intercept is 15/B, and we are told the y-intercept is 5.
15/B = 5
15 = 5B
B = 3
Answer: E. 3