Soln:
Let mikhale's age be X
Gabrielle's age be 3X
Sum of their ages is 44
To find,
their ages.
X+3X=44
4X=44
X=44/4
X=11
mikhale's age= 11
Gabrielle's age = 3x11=33
Sum of their ages 44
Thus we have got their ages.Gabrielle's age is 33 and Mikhale's age is 11.
She should use Mean. That is when you add together all of the numbers, then divide by the number of numbers. Her average grade is 80.75, or rounded it is 81.
Answer:
Infinite number of solutions
Step-by-step explanation:

For any value of x, both equations are equal to each other because both sides are identical
100 + 48=148 so that means she got 48 dollars for babysitting
Answer:
y= -a*x + 12
<u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u>b</u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u> </u><u>b</u>
Step-by-step explanation:
ax+by=12 (subtract "ax" from both sides so that the one on the left will become zero and we will have "by" )
by= -ax+12(divide both side by "by" so that we will have the equation as "y=mx+b")
finally the result will be:
y= -a*x + 12
b b