It is 20 because if u divide 78 by 3.75 ( 3 3/4 ) than equals 20.8
Write an equation system based on the problem
"Agatha is five times older than her son, Bob" could be written as:
a = 5b.......(first equation)
"Three years ago, she was nine times older" could be written as:
a - 3 = 9(b - 3)......(second equation)
Solve the equation system
To find the value of b, substitute 5b as a to the second equation
a - 3 = 9(b - 3)
5b - 3 = 9(b - 3)
5b - 3 = 9b - 27
5b - 9b = -27 + 3
-4b = -24
b = -24/-4
b = 6
Her son, Bob, is 6 years old
To find Agatha's age, substitute the value of b to the first equation
a = 5b
a = 5 × 6
a = 30
Agatha is 30 years old
1. (8/9)/4
8/9 * 1/4 = 8/36= 2/9 paint for each birdhouse
2. ron 1 mile every 20 minutes so 3 mph
1 mile every 24 minutes so ron is the faster walker
Answer:
66/85
Step-by-step explanation:
Well -x is the opposite of x
so i think that it makes the lines perpendicular
