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Kobotan [32]
3 years ago
14

Subtract and reduce

Mathematics
1 answer:
juin [17]3 years ago
8 0
Your equation is the following:
11 7/7 - (-8 3/7)
the first step to solving this is to know that when there is a "-" sign in front of the parenthesis, you need to change the sign of each term in the parenthesis.
11 7/7 + 8 3/7
now, add the whole numbers and the fractional parts of the mixed numbers separately.
(11 + 8) + (\frac{7}{7} +  \frac{3}{7})
add the whole numbers together 
19 + (\frac{7}{7} + \frac{3}{7})
now add the fractions together
19 + 10/7
next, convert the improper fraction to a mixed number 
19 + 1 3/7
now, you will write the mixed number as a sum of the whole number and its fractional part.
19 + 1 + 3/7
add the numbers together
20 + 3/7
finally, write the sum of the whole number and the fraction as a mixed number
20\frac{3}{7}
let me know if you have any further questions
:)
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HELPPP!!!???PLEASE HELPPP!!
andriy [413]

Answer:

\frac{5}{14} or 0.357142857143

Step-by-step explanation:

__________________________________________________________

\frac{2}{7}\div\frac{4}{5} = \frac{5}{14} because,

\frac{2}{7} = 0.285714285714

\frac{4}{5} = 0.8

0.285714285714 \div 0.8 = 0.357142857143

\frac{5}{14} = 0.357142857143

__________________________________________________________

<em>Hope this helps! <3</em>

__________________________________________________________

8 0
3 years ago
Read 2 more answers
Last school year, the student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors
tino4ka555 [31]

Answer:

\chi^2 = \frac{(83-90)^2}{90} +\frac{(68-72)^2}{72}+\frac{(85-78)^2}{78}+\frac{(64-60)^2}{60} = 1.66

And the answer would be:

c. 1.66

Step-by-step explanation:

We need to conduct a chi square test

The statistic to check the hypothesis is given by:

\sum_{i=1}^n \frac{(O_i -E_i)^2}{E_i}

the observed values for this case are:

Freshemen=83

Sophomores=68

Juniors = 85

Seniors= 64

The expected values for this case are:

Fres_E =0.3*300= 90

Sop_E =0.24*300= 72

Jun_E = 0.26*300 =78

Sen_E = 0.20*300= 60

Then the statistic would be given by:

\chi^2 = \frac{(83-90)^2}{90} +\frac{(68-72)^2}{72}+\frac{(85-78)^2}{78}+\frac{(64-60)^2}{60} = 1.66

And the answer would be:

c. 1.66

4 0
4 years ago
The piecewise function h(x) is shown on the graph.
Ray Of Light [21]

Answer:

00

Step-by-step explanation:

3 0
3 years ago
For each pair of numbers, tell: By what percent of the first number is the second number larger? By what percent of the second n
MAVERICK [17]
The answer for the first question is 33.33%.
Reason: The second number (20) is larger than the first number (15) by 5 and 5 is 33.33% the first number.
.
The answer for the second question is 25%, also.
Reason: The first number (15) is smaller than the second number (20) by 5 and it is 25 percent of the second number.
:)
8 0
4 years ago
X+2x+15=5x+5 what is the answer to this question I need so help please and thanks I need it fast as possible.
Nina [5.8K]

Answer:

5 =x

Step-by-step explanation:

X+2x+15=5x+5

Combine like terms

3x+15 = 5x+5

Subtract 3x from each side

3x+15 -3x = 5x+5 -3x

15 = 2x+5

Subtract 5 from each side

15-5 = 2x+5-5

10 =2x

Divide each side by 2

10/2 =2x/2

5 =x

7 0
3 years ago
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