Let Isaac = x
Ruby = x + 4
Svetlana = 4(x + 4)
Together they worked 104 hours, so...
x + x + 4 + 4(x + 4)= 104
x + x + 4 + 4x + 16 = 104
6x + 20= 104
6x = 84
x = 84/6 = 14
Isaac worked x = 14 hours
Ruby worked x + 4 = 18 hours
Svetlana worked 4(x + 4) = 4×18 = 72 hours
Check your answers...
72 + 18 + 14 = 104
104 = 104 it checks!
Answer:
36
Step-by-step explanation:
Y = 3/5x + 3
The number before x is the slope, and the last number is the number when x = 0 (aka x,y in coordinates)
2x^2 + 16x - 10 = 0
2(x^2 + 8x) - 10 = 0
2 [(x + 4)^2 - 16 ]- 10 = 0
[(x + 4)^2 - 16 - 5 = 0
(x + 4)^2 - 21 = 0
(x + 4)^2 = 21