(this is my little sister's homework, she needs ! )

katrina is 69.75 inches tall. her best friend, allison, is 64.85 inches in height. how many inches taller is katrina than allison?

a) 4.10
b) 4.90
c) 5.10
d) 5.90

B) 4.90

Step-by-step explanation:

Hi, to answer this question we have to analyze the information given:

Since Katrina is taller than Allison, to calculate the how many inches taller is Katrina than Allison, we have to subtract Allison’s height to Katrina’s height:

Mathematically speaking:

69.75 -64.85 = 4.9 inches.

let soccer = x and golf = y

part a

1st equation: x + y = 125

2nd equation: x = y +45

part b

replace x in the 1st equation with the 2nd one:

y + 45 + y = 125

simplify:

2y + 45 = 125

subtract 45 from each side:

2y = 80

divide both sides by 2:

y = 80/2

y = 40

she plays golf for 40 minutes.

part c

no because she plays soccer for 45 minutes longer than golf 40 +45 =   85 minutes, not 80 minutes.