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nikklg [1K]
1 year ago
12

Sally invested $1,200 in an account where interest compounded quarterly. After two years, she had $1,351.79 in her account. What

was her interest rate?
Mathematics
1 answer:
Licemer1 [7]1 year ago
5 0

use the formula

A=P(1+\frac{r}{t})^{n\cdot t}

clear the formula for the rate

A=P(1+\frac{r}{t})^{n\cdot t}

.

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ken paid $12 for two magazines. The cost of each magazine was a multiple of $3. What are the possible prices of the magazines?
lesya [120]
Well \frac{12 dollars}{2 magazines} is $6 per magazine and 6 is a multiple of 3, so that's a possibility.<span />
7 0
3 years ago
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2/3 -4x + 7/2 = -9x + 5/6
kirza4 [7]

Answer:

Step-by-steplanation:

Add: 1

2

+ 2

5

= 1 · 5

2 · 5

+ 2 · 2

5 · 2

= 5

10

+ 4

10

= 5 + 4

10

= 9

10

For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of the both denominators - LCM(2, 5) = 10. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 2 × 5 = 10. In the next intermediate step the fraction result cannot be further simplified by cancelling.

In words - one half plus two fifths = nine tenths.

Conversion a mixed number 6 2

7

to a improper fraction: 6 2/7 = 6 2

7

= 6 · 7 + 2

7

= 42 + 2

7

= 44

7

To find new numerator:

a) Multiply the whole number 6 by the denominator 7. Whole number 6 equally 6 * 7

7

= 42

7

b) Add the answer from previous step 42 to the numerator 2. New numerator is 42 + 2 = 44

c) Write previous answer (new numerator 44) over the denominator 7.

Six and two sevenths is forty-four sevenths

Add: the result of step No. 1 + 44

7

= 9

10

+ 44

7

= 9 · 7

10 · 7

+ 44 · 10

7 · 10

= 63

70

+ 440

70

= 63 + 440

70

= 503

70

For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of the both denominators - LCM(10, 7) = 70. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 10 × 7 = 70. In the next intermediate step the fraction result cannot be further simplified by cancelling.

In words - nine tenths plus forty-four sevenths = five hundred three seventieths.

3 0
4 years ago
Complete the pattern—- 9.5 950 95,000 —- ——
victus00 [196]

Answer:

  9,500,000  950,000,000

Step-by-step explanation:

Each number is 100 times the previous. Basically, add 2 zeros to get the next number.

  • 9.5
  • 950
  • 95,000
  • 9,500,000
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6 0
4 years ago
Find the value of x.<br> (7x - 1)º<br> (6x - 1)º
dangina [55]

Answer:

Step-by-step explanation:

7x - 1 + 6x - 1 = 180

13x - 2 = 180

13x = 182

x = 14

7(14) - 1 = 98 - 1= 97

6(14) - 1 = 84 - 1 = 83

6 0
3 years ago
What’s the answer need help to get good grade.
disa [49]

Answer:

3 to 7

Step-by-step explanation:

5 0
3 years ago
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