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.
No change. She gave the salesperson exactly the right amount to buy the racecar.
Using a calculator: cos 70 deg = 0.342. Note: it sounds as tho' you were given several answer options. Where are they?