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3 years ago

When would you need to use the Rule Of 72?

1 answer:

5 0

The rule says that to find the number of years required to double your money at a given interest rate, you just divide the interest rate into 72.

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X+2(x+3(x+4(x+5)))=153

Allushta [10]

Answer:

$x=1$

Step-by-step explanation:

Here first open the inner parentheses and use the distributive property,

$4(x+5)=4x+20\\\\(x+4(x+5))=(x+4x+20)=(5x+20)\\\\3(x+4(x+5))=3(5x+20)=15x+60\\\\(x+3(x+4(x+5)))=(x+15x+60)=16x+60\\\\2(x+3(x+4(x+5)))=2(16x+60)=32x+120\\\\x+2(x+3(x+4(x+5)))=x+32x+120=33x+120\\\\\\Hence\ x+2(x+3(x+4(x+5)))=x+32x+120=33x+120\\\\\Rightarrow 33x+120=153\\\\33x=153-120\\\\33x=33\\\\x=1$

3 0

3 years ago

Jay bought a guitar on sale at 45% off. The original price was $576.75.

topjm [15]

Answer:

317.21 (sales price)

259.53 (discount amount)

Step-by-step explanation:

First, we need to divide.

576.75/100=5.7675 (note that I will be rounding at the end)

5.7675 x 55 (100-45) = 317.2125

Rounds to: 317.21

Now, we need to find the discount amount.

576.75

-317.21

=259.53

6 0

3 years ago

8x^2+32x-96<img src="https://tex.z-dn.net/?f=8x%5E%7B2%7D%20%2B36x-96" id="TexFormula1" title="8x^{2} +36x-96" alt="8x^{2} +36x-

erma4kov [3.2K]

Answer:

−19282+104−96

Step-by-step explanation:

hopefully this helps, I'm not sure I'd it is correct though

4 0

3 years ago

What is 4(5x + 3) 4(5x + 3)

Travka [436]

Answer:

what math is this???????

3 0

3 years ago

Read 2 more answers

Find the solution: 16x-18=2y 4x+9=y x=____ y=____

faltersainse [42]

Answer:

y=27,x=4.5

Step-by-step explanation:

3 0

4 years ago