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seraphim [82]
4 years ago
14

A student solved the following problem.

Mathematics
1 answer:
siniylev [52]4 years ago
8 0

Answer:

All of them are wrong. Because the solution is t=-15.

Step-by-step explanation:

t+7=-8

t=-8-7

t=-15

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What is the fractional notation of 2.4%
Vanyuwa [196]
2.4% = 2.4/100 or as a decimal fraction 0.024.
8 0
4 years ago
Find the 21st term of the sequence 15,8,1,-6
Alika [10]

Answer:

-125

Step-by-step explanation:

Each term is 7 less than the previous term.

1st term: 15

2nd term: 15 - 7

3rd term: 15 - 7 - 7 = 15 - 2(7)

4th term = 15 - 7 - 7 - 7 = 15 - 3(7)

Notice that each term is 15 minus a multiple of 7. The multiple is obtained by multiplying 7 by 1 less than the term number.

The formula is:

a_n = 15 - 7(n - 1)

For the 21st term, multiply 7 by 20, and subtract from 15.

7 × 20 = 140

15 - 140 = -125

Using the formula:

a_{21} = 15 - 7(21 - 1) = 15 - 7(20) = 15 - 140 = -125

Answer: -125

7 0
3 years ago
The number of hours, t, it takes a boat to travel 15 miles upstream is represented
iogann1982 [59]

The equation of c is an illustration of subject of formula

The equation of c in terms of r and t is c = r - 15/t

<h3>How to determine the equation?</h3>

The equation is given as:

t = 15/(r - c)

Cross multiply

t(r - c) = 15

Divide both sides by t

r - c = 15/t

Subtract r from both sides

-c = -r + 15/t

Multiply both sides by -1

c = r - 15/t

Take LCM

c = \frac{rt - 15}{t}

Hence, the equation of c in terms of r and t is c = \frac{rt - 15}{t}

Read more about subject of formula at:

brainly.com/question/10643782

8 0
2 years ago
10. The legend on a map indicates inch = 16
marysya [2.9K]

Answer:

5.5 miles

Step-by-step explanation:

88 divided by 16 = 5.5

5 0
3 years ago
Read 2 more answers
What is the value of n when (9)^2n-1 = (27)^n+2
Elis [28]

9^{2n-1} = 27^{n+2} \\ ( {3}^{2} ) ^{2n - 1}  = ( {3}^{3} )^{  n + 2}  \\  {3}^{4n - 2}  =  {3}^{3n + 6}  \\ 4n - 2 = 3n + 6 \\ 4n - 3n = 6 + 2 \\ n = 8

Answer: n=8

5 0
3 years ago
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