Answer:
you answer is <u>7x - 16</u>
4x - 1
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2 answers:
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Answer:
a.
b. x = 4 (see steps below)
Step-by-step explanation:
Since the two polygons are similar, the sides are proportional to each other. Using a proportion, you can solve for 'x' using cross-multiplication and division:
Cross-multiply: 15(x + 3) = 21(x + 1)
Distribute: 15x + 45 = 21x + 21
Subtract '15x' from both sides: 15x + 45 - 15x = 21x + 21 - 15x or 45 = 6x + 21
Subtract '21' from both sides: 45 - 21 = 6x + 21 - 21 or 24 = 6x
Divide by 6 on both sides: 24/6 = 6x/6
Solve for x: x = 4
To solve this we are going to use the simple interest formula: 
where
is the final amount.
is the initial investment.
is the interest rate in decimal form.
is the time in years.
Investment A. We know that the initial investment is $10,000, so
. We also know that the number of years is 5, so 
. To convert the interest rate to decimal form, we are going to divide the rate by 100%
Lets replace those values in our formula to find:
Investment B.
, 
, and 
.
We can conclude that investment A will be worth than investment B at the end of the investment period.
where
Investment A. We know that the initial investment is $10,000, so
Lets replace those values in our formula to find
Investment B.
We can conclude that investment A will be worth than investment B at the end of the investment period.