-5(y-15=3x) = -5y+75=-15x
add 15x to both sides and subtract 75 to both sides
-5y+15x=-75
5y-2x=-3
13x=-78
divide 13 to both sides
x=-6
y-15=3(-6)
y-15=-18
add 15 to both sides
y=-3
so the answer is (-6,-3)
I hope that this helped you sweetie :)
The height that a ball reaches at a certain time t is given by the equation,
h = 2 - 15t + 5t²
We are asked to compute for the values of t that would allow the ball to reach a height of 7 meters.
Substitute the 7 to the equation,
7 = 2 - 15t + 5t²
Transposing,
5t² - 15t - 7 + 2 = 0
Simplifying,
5t² - 15t - 5 = 0
Divide the equation by 5,
t² - 3t - 1 = 0
The values of t can be calculated through the quadratic formula,
t = (-b +/- sqrt(b² - 4ac))/2a
Substituting,
t = (3 +/-sqrt (9 - 4(-1)) / 2(1)
t = 3.3 or t = -0.30
Since, we cannot have t as a negative number hence, our final answer is:
<em> t = 3.3 s</em>
Answer:
Bottom= 3 Left side= 2.15 Right side= 1,775
Step-by-step explanation:
Divide every side by 4
Hi!
10.
This question is basically asking you, 10 is 40% of what number?
10 × 100 / 40 = 25
Fred must do 25 math problems.
12.
Bed & Bath = 40%
Clothing = 0.625 = 62.5%
Appliances = 20%
Electronics = 0.25 = 25%
Least to Greatest: Appliances (20%), Electronics (25%), Bed & Bath (40%), Clothing (62.5%).
