9. The number of boys in a school is 120 more than the numbers of girls. If there are 980 students in the school, find the number of boys and girls in the school.

Step-by-step explanation:

Let,

No. of girls = x

No. of boys = 120 + x

=> 120 + x + x = 980

=> 120 + 2x = 980

=> 2x = 980 - 120

=> 2x = 860

=> x = 860/2

=> x = 430

=> 120 + x = 120 + 430 = 550

Hence,

No. of girls = 430

No. of boys = 550

you'll just earn points here

step-by-step explanation:

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x