Given :
a restaurant customer left a $1.95 as a tip.
The tax = 5%
the tip was 15% of the after-tax cost
So, the information that not needed is the tax
Let the total bill = x
so, 15% of x = 1.95
so, the total bill = $13
Answer:
17
Step-by-step explanation:
Solve the equation for x then plug that into the 1st expression.
-3 + 4x = -19
4x = -19 + 3
4x = -16
x = -4
then
-3x + 5
-3(-4) + 5 = 12 + 5 = 17
Ax + bx = 21
factor out x
x(a + b) = 21
x = 21/(a+b)
If the width is w and the length is l, then 2w+2l=perimeter=34=2*6.5+2l=13+2l. Subtracting 13 from both sides, we get 21=2l and by dividing both sides by 2 we get 10.5
25 - 21 = 4 questions of his history incorrectly ;
4 / 25 = 0.16 represents the fraction of problems he answered incorrectly ;
