Answer:
She will by about 37 years not 30 years
Step-by-step explanation:
Explanation is in attached picture
Step-by-step explanation:
Given
a : b = 5 : 3
or
a = 5 and b = 3
Now
= <u>5a - 3b</u>
5a + 3b
= <u>5</u><u> </u><u>*</u><u> </u><u>5</u><u> </u><u>-</u><u> </u><u>3</u><u> </u><u>*</u><u> </u><u>3</u>
5 * 5 + 3 * 3
= <u>2</u><u>5</u><u> </u><u>-</u><u> </u><u>9</u>
25 +9
= 16/ 34
Dividing both numerator and denominator by 2 we get
= 8/17
The regular price for the football helmet would be $179.29.
Eliminate y's
multiply 2nd equation by 3 and add to first
5x+3y=55
<u>12x-3y=30 +</u>
17x+0y=85
17x=85
divide both sides by 17
x=5
sub back
4x-y=10
4(5)-y=10
20-y=10
-y=-10
y=10
x=5
y=10
(5,10)
or you could subsitution with y=4x-10
(5,10)
It’s 60 degrees so the first one