Expression is 900 - 75n
Step-by-step explanation:
- Step 1: Maximum watts that can be used is 900W. Find amount of watts used by n light bulbs.
⇒ Watts used by n light bulbs = 75 × n = 75n
- Step 2: To find the remaining amount of wattage, subtract the maximum possible W and the watts used by the light bulbs.
⇒ 900 - 75n
936 divided by 9.75=96
hope this helped:)
Answer:
We will add 64 to both sides.
x=8±√20
Step-by-step explanation:
Here we are given the equation:
Now we take half of the coefficient of x and add it to x.
Coefficient of x is 16, half of 16 is 8.
Also we add square of 8 to both sides.
So new equation becomes:
Completing the square:
NOw let us simplify it to get the value of x.
Taking square root on both sides:
Bringing 8 to the right side:
x=8±√20
-- At 11 AM, when Mel starts out, Juan has already covered 60 miles.
-- After that, since they're traveling in opposite directions, the distance
between them increases (60 + 50) = 110 miles every hour.
Let's call 'H' the number of hours after 11 AM.
Then the distance between them is
D = 110H + 60
When is this distance 830 miles ? Wouldn't you like to know !
830 = 110H + 60
Subtract 60 from each side:
770 = 110H
Divide each side by 110 :
H = 770 / 110 = 7 .
It happens 7 hours after 11 AM.
That would be <u>6:00 PM</u> .
