<span>100 + 30x = 50 + 35x.
-50 -30x -50 -30x
50 = 5x
10 = x
At ten months they would have paid the same amount so at 11 months, Lisa would pay more than Kelly.</span>
Lets find how many boys there are.
First we add the ratios:
7 + 5 = 12
Then we divide the total number of students by this:
240 / 12 = 20
Now to find out how many boys there are, we times this by the ratio of boys:
20 x 5 = 100
Finally we divide the number boys, by the total number of students. We then times this number 100 to change it from a decimal to a percentage.
100 / 240 = 0.41666 (Multiply this by 100 to get the percentage)
0.41666 x 100 = 41.67%
Answer:
I got -8m+24-32n
Step-by-step explanation:
8 and m equals 8m and since its negative 8 you add a negative sign: -8m
A negative and a negative equals a positive so its a positive sign and it equals +24:+24
A negative and a positive equals a negative so its minus 32n since the 4 includes an n:-32m
9x + 1 = 5x - 15
Subtract 1 from both sides.
9x = 5x - 16
Subtract 5x from both sides.
4x = -16
Divide both sides by 4.
x = -4