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Rashid [163]
2 years ago
10

Stacey has earned $9 interest over the past 20 months with an initial investment of $150. What is the simple interest rate she i

s earning? Express your answer to the nearest tenth of a percent. (It wants me to use the formula I=Prt which I don't remember)
Mathematics
1 answer:
Roman55 [17]2 years ago
3 0

Answer:

3.6%

Step-by-step explanation:

We are solving the above question, using the simple interest Formula:

I = PRT

Where

I = Interest = $9

P = Principal = $150

R = Interest rate = ??

T = Time in years = 20 months

We convert this to years

12 months = 1 year

20 months = x

x = 20/12

x = 1.67 years

Hence, making R the subject of the formula

R = I/PT

R = 9/150 × 1.67

R = 9/250.5

R = 0.0359281437

Converting to percentage

R = 0.0359281437 × 100

R = 3.59281437%

R = 3.6 %

The simple interest rate she is earning is 3.6%

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A man bought a house for 3600 Naira he repairs the house with 150 Naira if he sold the house for 4950 Naira . Find his percentag
kozerog [31]

Step-by-step explanation:

profit%=

\frac{selling \: price - cost \: price}{cost \: price}  \times 100\%

\frac{4950 \: naira - 3600 \: naira + 150 \: naira}{3750 \: naira}  \times 100\%

\frac{4950 - 3750}{3750}  \times 100\%

\frac{1200}{3750}  \times 100\%

=36%

7 0
2 years ago
Which expression gives the closest estimate of 268 + 524?
Schach [20]

Answer:

250+500=750 , 268+524=792 so therefore 250+500 is the answer

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
Three times the sum of a number and 4 is twice a number minus 8.
amm1812

Answer:

Step-by-step explanation:

3(n+4)=2n-8

3n+12=2n-8

5n= -20

n= -4

8 0
3 years ago
Need help <br> Value of n2(m+r)if m=3,n=2,r=4
melisa1 [442]
Answer 28 because you plug it in for your answer.
3 0
3 years ago
Solve for a: 5(a+5)-3=3(2-a)
ivann1987 [24]

Simplify:

5(a + 5) + -3 = 3(2 + -1a)

Reorder the terms:

5(5 + a) + -3 = 3(2 + -1a)

(5 * 5 + a * 5) + -3 = 3(2 + -1a)

(25 + 5a) + -3 = 3(2 + -1a)

Reorder the terms again:

25 + -3 + 5a = 3(2 + -1a)

Combine like terms:

]25 + -3 = 22

22 + 5a = 3(2 + -1a)

22 + 5a = (2 * 3 + -1a * 3)

22 + 5a = (6 + -3a)

Solve:

22 + 5a = 6 + -3a

To solve for variable 'a':

You have to move all terms containing A to the left, all other terms to the right.

Then add '3a' to each side of the equation:

22 + 5a + 3a = 6 + -3a + 3a

Combine like terms:

5a + 3a = 8a

22 + 8a = 6 + -3a + 3a

Combine like terms again:

-3a + 3a = 0

22 + 8a = 6 + 0

22 + 8a = 6

Add '-22' to each side of the equation.:

22 + -22 + 8a = 6 + -22

Combine like terms:

22 + -22 = 0

0 + 8a = 6 + -22

8a = 6 + -22

Combine like terms once more:

6 + -22 = -16

8a = -16

Divide each side by '8'.

a = -2

Simplify:

a = -2

Answer: a=-2

Hope I could help! :)

8 0
3 years ago
Read 2 more answers
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