Answer:
11 hours she worked at the grocery store
Step-by-step explanation:
assuming,
the number of hours worked at tutoring = x
the number of hours worked at grocery store = y
which means,
the amount she made at tutoring = x* $15
the amount she made at grocery store = y*$9
we have 2 equations
<em>total number of hours</em>
1) x+y= 15
<em>total amount she earned</em>
2) x* $15+ y* $9= $159
From equation 1
x+y= 15
x=15-y
<em>we replace this x value in equation 2</em>
x* $15+ y* $9= $159
(15-y)* $15+ y* $9= $159
(15*15)- 15y+9y=159
225-6y=159
225-159=6y
66=6y
66/6=y
<u>11=y</u> <em>the number of hours she worked at grocery store. </em>
<em>we place y=11 in our derived x equation</em>
x=15-y
x=15-11
<u><em>x=4 </em></u><em>the number of hours she worked at tutoring. </em>
Answer:
Step-by-step explanation:
move constant to the right and change the sign
X=12-8
X=4
<span>The
missing pieces strategy is another method to compare two fractions. To tell
which number is larger, you ned to see which one is missing less. For example
you have ¾ versus 4/5. Each of these fraction needs 1 to complete the whole. You
need to subtract the numerator with one to compare them. For ¾ we have ¼ and
for 4/5 we have 1/5. You know that if you complete 4/5 you will get 5 and for ¾
you will get 4. You know that 5 is greater than four. Therefore, 4/5 is larger
than ¾.</span>
The answers is the picture I posted. I did in khan academy and it was right.
