A)
a+b=180 and a=2(b-30) using this in the first equation gives you:
2(b-30)+b=180
2b-60+b=180
3b-60=180
3b=240
b=80 so a=100
Andre's score was 100 and Brandon's score was 80.
b)
100x-200>50x-75 subtract 50x from both sides
50x-200>-75 add 200 to both sides
50x>125 divide both sides by 50
x>2.5
It is gonna be X= - 60/19
Answer:
The y intercept is 1/2
i.e. The starting height is 1/2
Step-by-step explanation:
Given

Required
Determine the y intercept --- <em>Missing</em>
At y intercept: 
So:

Substitute 


<em>The y intercept is 1/2</em>
The lowest test score that Stephen can get in order to still average a score of 90 is 94. The answer is 94.
Answer:
y = 19 (3)x
Explanation:
y = abx
Plug in the numbers from the 2 given points to find a and b.
19 = ab0 = a
a = 19
171 = 19b2
b = 3
y = 19 (3)x