Answer:
Step-by-step explanation:
Given
Required
The inverse
Replace f(n) with y
Swap positions of y and n
Make y the subject
Replace y with f'(n)
What is the area of the rectangle?
1 answer:
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We can eliminate one of the variables to solve for the other variable, as in both equations, y has opposite coefficients. Combine these two equations:
Divide both sides by 2 to get x by itself:
Plug this value into the second equation:
Subtract 123 from both sides to get y by itself:
Malik has 123 domestic stamps and 89 foreign stamps.
Divide both sides by 2 to get x by itself:
Plug this value into the second equation:
Subtract 123 from both sides to get y by itself:
Malik has 123 domestic stamps and 89 foreign stamps.
Answer:
a) $160
b) $116.50
Step-by-step explanation:
a) Let the original price of the yellow bicycle be $x.
Since both has the same original price,
original price of yellow bicycle= 100% x
original price of green bicycle= 100% x
Discounted price of yellow bicycle
= (100% -25%) x
= 75% x
Discounted price of green bicycle
= (100% -30%) x
= 70% x
Difference in cost
= 75%x -70%x
= 5% x -----(1)
From 2nd paragraph:
Discounted price of yellow bicycle
= Kyreen's money +3.50
Discounted price of green bicycle
= Kyreen's money -4.50
Difference in cost
= (Kyreen's money +3.50) -(Kyreen's money -4.50)
= Kyreen's money +3.50 -Kyreen's money +4.50
= 3.50 +4.50
= 8.00 -----(2)
Equating (1) and (2) together:
5% x= 8.00
x= 8 ×20
x= 160
Thus, the original price of the yellow bicycle is $160.
_______
b) Amount Kyreen has at first
= discounted price of yellow bicycle -$3.50
= 75%($160) -$3.50
= $120 -$3.50
= $116.50