Answer:
and
Step-by-step explanation:
Given
[Correct Question]
Required
Solve using elimination
First, we eliminate x.
Subtract equation (1) from (2)
Divide through ny 7
Take
Make x^2 the subject
Substitute 4 for y
Take square roots
Answer:
a
Step-by-step explanation:
d
The 15% discount means that they only pay 100%-15% = 85% of the meal's bill.
This would cost 85% * 78.65.
However, they also have to pay a 20% tip of the meal cost.
This would cost 20% * 78.65.
Total Cost = (85% * 78.65) + (20% * 78.65)
= 105% * 78.65
= 1.05 * 78.65
= $82.58