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alekssr [168]
3 years ago
10

99 POINTS.......................................................................................................................

...........Gloria deposited $500 into a bank account that earned 7.5% simple interest each year. She earned $225 in interest before closing the account. If no money was deposited into or withdrawn from the account, for how many years was the money in the account? Round your answer to the nearest whole year.
Mathematics
2 answers:
sladkih [1.3K]3 years ago
6 0
1st year...
500 = 100%
5 = 1% 
2.5 = 1/2% or .5%
So, you have to do 5 x 7 to get 35 which is 7% then you have to tack on the 2.5 to get 7.5%

2nd year...
537.5 = 100%
5.375 = 1%
2.6875 = 1/2% or .5%
So now 5.375 x 7 = 37. 625 + 2.6875 (I will round at the end) = 40.3125
So 37.5 + 40.31 (rounding!) = 77.81 in interest so far.

3rd year...
537.5 + 40.31 = 577.81 = 100%
5.77 = 1%
2.89 (was 2.885 but round up) = 1/2% or .5%
so 5.77 x 7 = 40.39 + 2.89 = 43. 28 = 7.5%
577.81 + 43.28 = 621.09

4th year....
621.09 = 100%
6.21 = 1%
3.11 (was 3.105, but round up)
6.21 x 7 = 43.47 + 3.11 = 46.58
621.09 + 46.58 = 667.67

5th year...
667.67 = 100%
6.68 (round up) = 1%
3.34 = 1/2% or .5%
6.68 x 7 = 46.76 + 3.34 = 50.1
667.67 + 50.1 = 717.77

So as a fact, I will go over next year, so your answer is 6 whole years.

Hope this helped! Hope I'm not wrong!
kirill115 [55]3 years ago
6 0

Answer:6 years

Step-by-step explanation:

Because you have to multiply each year in order to get your answer but you also have to do each year out tho.

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Answer:

\text{B. }\frac{1}{3}x-3=-x+1

Step-by-step explanation:

Let's start by taking a look at the blue line. The slope of any line that passes through two points is equal to the change in y-values over the change in x-values. We can see that the line passes through points (0, 1) and (1, 0). Assign these points to (x_1,y_1) and (x_2, y_2) (doesn't matter which you assign) and use the slope formula:

m=\frac{y_2-y_1}{x_2-x_1}

Let:

(x_1,y_1)\implies (0,1)\\(x_2,y_2)\implies (1, 0)

The slope is equal to:

m=\frac{0-1}{1-0}=\frac{-1}{1}=-1

Therefore, the slope of this line is -1. In slope-intercept form y=mx+b, m represents slope, so one of the lines must have a term with -x in it, which eliminates answer choices A and D.

For the second line, do the same thing. The red line clearly passes through (0, -3) and (3, -2). Therefore, let:

(x_1,y_1)\implies (0,-3)\\(x_2,y_2)\implies (3, -2)

Using the slope formula:

m=\frac{-2-(-3)}{3-0}=\frac{1}{3}

Thus, the slope of the line is 1/3 and the other line must have a term with \frac{1}{3}x in it, eliminating answer choice C and leaving the answer \boxed{\text{B. }\frac{1}{3}x-3=-x+1}

*You can find the exact equation of each line by using the slope formula as shown and plugging in any point the line passes through into y=mx+b

7 0
3 years ago
use the order of operations to simplify this expression. exspress your answer in the simplest form. 1/4 + 1/2 ÷ 2/8​
elixir [45]

Answer:

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Step-by-step explanation:

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you get a answer of

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umka21 [38]
The answer is (3x+4)(x-5)
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If a baseball team's ratio of wins to losses is 5 to 4, what is the ratio of wins to total games played?
lara [203]
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8 0
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Jerry’s loan had a principal of $22,000. He made quarterly payments of $640 for nine years until the loan was paid in full. How
Leto [7]

Answer: $1040

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