Step-by-step explanation:
y=4x+5+x
y=5x+5
Answer:
9x-5 (only when x=2) (age is double of 4)
4x+5
4*2 +5 = 13
4x +5x-5 =13
9x-5=13
9*2-5=13
18-5=13
WITH OTHER NUMBERS (x=2)
3x+5
3*2 +5 =11
3*2 +5*2 -5 =11
8*2-5=11 (8x-5)=11
16-5=11
3.69 hours
y = 80.25x + 78.75
y = 95.75 + 40
85.25x + 78.75 = 95.75 + 40
-85.25x -40 -85.25x -40
38.75/10.5 = 10.5x/10.5
3.690476190..... = x
rounding
3.69 = x
