Maggie's brother is 9 years younger than three times her age. the sum of their ages is 43. how old is maggie?

Maggie's age is 13 years

Step-by-step explanation:

Let

x > Maggie's brother age

y > Maggie's age

we know that

x+y=43 > equation A

x=3y-9 > equation B

substitute equation B in equation A and solve for y

(3y-9)+y=43

4y=43+9

4y=52

y=13

therefore

Maggie's age is 13 years

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

did you get the answer yet?

step-by-step explanation: