Answer:
Step-by-step explanation:
ohn will need to sleep for 10.3 hours before his second exam so that the
he average of his two exam scores is an 80.
We were given
8 hours of sleep = 70
To get an average of 80
70+ x = 80
2
Cross multiply:
70+x = 160
x= 160-70
= 90.
If 8 hours of sleep = 70
x hours of sleep = 90
Cross multiply
8× 90 = 70 × x
720 = 70x
x = 720/70
x = 10.2857
≈ 10.3 hours of sleep
Answer:
342.5 miles or D
Step-by-step explanation:
55 x 3.5 = 192.5
60 x 2.5 = 150
192.5 + 150 = 342.5
This should be it! Please mark me Brainliest :)
Answer:
b.) x = -8
Step-by-step explanation:
Solve -4*(2x + 3) = 2x + 6 - (8x + 2)
-8x + -12 = 2x + 6 - 8x - 2
-8x - 12 = -6x + 4
-12 = 8x - 6x + 4
-12 = 2x + 4
-12 - 4 = 2x
-16 = 2x
x = -8
Step-by-step explanation:
To solve an inequality use the following steps: Step 1 Eliminate fractions by multiplying all terms by the least common denominator of all fractions. Step 2 Simplify by combining like terms on each side of the inequality. Step 3 Add or subtract quantities to obtain the unknown on one side and the numbers on the other.
Answer:
3,5 I think is the point of axis
Step-by-step explanation:
ok