3 67/100
3 will stay a whole number so you put that as the whole number. 67 is 67 percent of a whole. so you put it over 100.
Answer:
286,287,288
Step-by-step explanation:
(x)(x+1)(x+2)=23639616
x^3+3x^2+2x=23639616
After solving the equations, you should get the answers.
A)
160c / 20m
1c / (20/160)m
therefore, he takes 1/8 minutes to burn 1 calorie
b)
m = rise/run = 20/160 = 1/8
Answer:
86.634
Step-by-step explanation:
Let the number of hours she spent in baby- sitting is x
and the number of hours she spent in music lessons is y.
Now, we have been given that she worked a total of 18 hours. Hence, we have
![x+y=18\\ y=18-x...............................(1)](https://tex.z-dn.net/?f=x%2By%3D18%5C%5C%0Ay%3D18-x...............................%281%29)
And she made $139. Thus, we have
![5x+12y=139..............................(2)](https://tex.z-dn.net/?f=5x%2B12y%3D139..............................%282%29)
Substituting the value of y from equation 1 in 2, we get
![5x+12(18-x)=139\\ 5x+216-12x=139\\ -7x=-77\\ x=11](https://tex.z-dn.net/?f=5x%2B12%2818-x%29%3D139%5C%5C%0A5x%2B216-12x%3D139%5C%5C%0A-7x%3D-77%5C%5C%0Ax%3D11)
Therefore, she spent 11 hours in baby-sitting.