Answer:
x = 11
Step-by-step explanation:
4x + 7 = 3 (2x - 5)
4x + 7 = 6x - 15
-2x + 7 = -15
-2x = -22
x = 11
<span>times t hours and (t+2) hours)
d1 = 50 t
d2 = 40(t+2)
50 t = 10 + 40(t+2)
10 t = 90
t = 9
</span>
First lets put like terms together!
subtract 5 by both sides
Then we have to get x by itself, in order to do this we divide by 2
Answer:
x = 8
Step-by-step explanation:
The sum of the measures of two complementary angles is 90°.
m<C + m<D = 90°
5x + 7x - 6 = 90
12x = 96
x = 8
Answer:
The inverse of the function is ±sqrt( (x+4)/2
Step-by-step explanation:
Set the function equal to y
y = 2x^2 -4
Exchange x and y
x = 2y^2 -4
Solve for y
Add 4 to each side
x+4 = 2y^2 -4+4
x+4 = 2y^2
Divide each side by 2
(x+4)/2 = 2/2y^2
(x+4)/2 = y^2
Take the square root of each side
±sqrt( (x+4)/2 )= sqrt(y^2)
±sqrt( (x+4)/2 )= y
The inverse of the function is ±sqrt( (x+4)/2
