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alekssr [168]
4 years ago
7

Robby invested $18,400 at 7% interest. He earned $9016 interest at the end of x years. What is the value of x? A. 10 B. 9 C. 8 D

. 7
Mathematics
1 answer:
lara [203]4 years ago
4 0
<span>This is an example of a Simple interest. We have an annual rate 7% ( or r=0.07). A=18,400 + 9,016 =$27,416. The formula for calculating the Simple interest: A=P*(1+r*x), 27,416=18,400*(1+0.07x), 1+0.07x=27,416:18,400, 1+0.07x=1.49, 0.07x=1.49-1, 0.07x=0.49, x=0.49:0.07, t = 7. Answer: D) x=7 years</span>
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3 years ago
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Rudik [331]
4/10 is equal to 2/5, and 0.4.

2/5 can be found by simplifying the fraction (dividing top and bottom by 2). 0.4 can be found by dividing 4 by 10.

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4 years ago
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6(6n – 6) &lt;-108<br><br> Idk how to solve this help
Allushta [10]

Answer:

\Huge \boxed{N

Step-by-step explanation:

To solve this problem, first you have to isolate it on one side of the equation. To solve this problem, division property of equality is divide both sides of an equation by the same number doesn't change the equation.

First, divide by 6 from both sides.

6(n-6)/6<-108/6

Solve.

-108/6=-18

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Next, add 6 from both sides.

6n-6+6<-18+6

Solve.

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Then, divide by 6 from both sides.

6n/6<-12/6

Solve.

-12/6=-2

As a result, the correct answer is n<-2.

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7 0
4 years ago
A variable is at the​ _______ level of measurement if it allows for the values of the variable to be arranged in a specific orde
nignag [31]
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Write an equation of the line that passes through a pair of points (-5, -2), (4, 5)
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First thing is to find the slope using the formula m = Δy ÷ Δx
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Now we simplify 
m = 7 ÷ 9 

Our equation so far is y = 7/9x + b. Now we can substitute the values of x and y from a point to figure out the answer. The equation here uses the point (4,5)

5 = 7/9 · 4 + b

Get b on one side
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Simplify
b = 1 + 8/9

That makes the equation of the line y = 7/9x + (1 + 8/9)
8 0
4 years ago
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