Meghan sells advertisements for a radio station. Each 30 second ad costs $20 per play, and each 60 second ad costs $35 per play. Meghan sold 12 ads for $315. She wrote the system below letting x represent the number of 30
second ads and y represent the number of 60 second ads.
X+ y = 12
20x+35y = 315
What is the solution to the system of equations?

Need answers ASAP

Step-by-step explanation:

Megan's equation will be:

Substitute in the first equation:

Find x:

Where x and y represent 30-second and 60-second ads sold, we find that Meghan's sales were:

hope this helps....

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls

if a = 1,   and b = 2, then the answer is 47.99999999. if you round that to the nearest whole number, the answer is 48.