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azamat
3 years ago
5

SAT prep: Prove that 3x – 4 ( 5 – x ) is equivalent to 7x – 20

Mathematics
1 answer:
Alik [6]3 years ago
4 0
3x -4 (5 - x) = 7x -20
3x-20+4x=7x-20
7x-20=7x-20
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Three friends decide that they each want to be able to buy a new bike in four years.IIiana puts $500 in a savings account with a
Lisa [10]

Answer:

Iliana will have the most money, with a total of $580

Step-by-step explanation:

We can find the amount of money that each one will have using the formulas of interest:

For Iliana and Joann, simple interest: Total money = P + P*r*t

For Cyndy, compound interest: Total money = P*(1+r)^t

So, using the time of four years, we can calculate the total money of each one:

Iliana: P = 500 and r = 0.04:

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Total money = 515 + 515*0.03*4 = $576.8

Cyndy: P = 500 and r = 0.035:

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So Iliana will have the most money, with a total of $580

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Step-by-step explanation:

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Lines a and b are parallel.
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