Answer:
Function 1
Step-by-step explanation:
let the goldfish be x and the guppies be y
4x + 3y = 29...equ(1)
3x + 5y = 30...equ(2)
multiplying equation 1 by 5 and equation 2 by 3
20x + 15y = 145...equ(1)
9x + 15y = 90...equ(2)
subtracting equation 2 from 1
11x = 55
∴x = 5
substituting the value of x into equation
4(5) + 3y = 29
20 + 3y = 29
3y = 9
∴y =3
4m - 7
4 * 5 - 7
20 - 7
First answer: 13
4n-3m
4*8 - 3*5
32-15
Second answer: 17
6m/n-3
6*5/8-3
30/8-3
3.75-3
Third answer: 0.75
Answer: They washed 60 small cars.
Step-by-step explanation:
5x + 10y = 800
y = 50
5x + 10(50)
5x + 500 = 800
Subtract 500 from each side
5x = 300
Divide each side by 5
x = 60
