Step-by-step explanation:
A = 1/2h(b1 + b2)
2A = h(b1 + b2)
h(b1 + b2) = 2A
h = 2A/(b1 + b2)
Answer:
8.25% is the interest rate on this account
This gives you three simultaneous equations:
6 = a + c
7 = 4a + c
1 = c
<u>c = 1
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If c =1,
6 = a + 1
<u>a = 5
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This doesn't work in the second equation, so the quadratic that goes through these points is not in the form y = ax^2 + bx + c
Was there supposed to be a b in the equation?
Answer:
17
Step-by-step explanation:
The discount on the shirt is 15%
Discount = price* discount rate
= 20 * 15%
= 20 * .15
=3
The new price is the previous price minus the discount
new price = 20-3
new price = 17