Answer:
y=-4x+3
Step-by-step explanation:
(1,-1) y=mx+b
-1=-4 × 1+b
b=-1-(-4)(1)
b=3
y=-4x+3
Answer:
x = 12
y = 12√3
Step-by-step explanation:
Answer:
295 ft.
Step-by-step explanation:
12 x 15 = 180
475 - 180 = 295 ft.
X+Y=10
XY=-300
Solve for one of the variables
X=10-Y
Plug into the other equation
Y(10-Y)=-300
Now, you have a quadratic...
-y²-10y+300=0
I would multiply everything by -1, so there's no coefficient on y²
y²+10y-300=0
And solve...
-10±√(100-4(-300))
----------------------------
2
Y=-5±5√(13)
Plug back onto original equation...
X+(-5±5√(13))=10
X±5√(13)=15
X=15±5√(13)
Note: There are 2 sets of answers, keep the negatives with the negatives, and the positives with the positives when dealing with the ±.
Answer:
13-Aug-2017 · 2 answers
A ball is dropped from a vertical height of 40 ft. Each time the ball bounces, it loses energy and only returns to a height that is 80% of the previous