Answer:
40 minutes
2/3 hours
0.667 hour
2,400 seconds
Step-by-step explanation:
X= 14 + 9y over 2
y= -x - 7 over 6
Answer: x^2 + 9x + 20
Step-by-step explanation:
Foil Method: (a + b) (c + d) = ac + ad + bc + bd
Lets say:
a = x
b = 5
c = x
d = 4
Plugging in the numbers: xx + 4x + 5x + 5*4
Combine like terms:
xx = x^2
4x + 5x = 9x
5 * 4 = 20
You're then left with: x^2 + 9x + 20
Answer: 12.6=13
Step-by-step explanation: