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3 years ago

Plz solve using a bar model and will mark brainliest whoever’s correct with reasonable work

Mathematics

1 answer:

marishachu [46]3 years ago

4 0

You just need to do 12 1/5 ÷ 1 4/5.
To do this, first convert both fractions to improper fractions or topheavy fractions.

12 1/5 -
15 × 5 is 60, 60 + 1 is 61 so 12 1/5 = 61/5

1 4/5 -
1 × 5 is 5 and 5 + 4 is 9. 1 4/5 = 9/5

To divide fractions, you do keep, chang, flip (keep the 1st fraction, change the ÷ to ×, and flip the 2nd fraction)

the question starts as 61/5 ÷ 9/5 and becomes 61/5 × 5/9

multiplication in fractions is literally just numerator × numerator / denominator × denominator.

61 × 5 is 305. 5 × 9 is 45. the fraction is 305/45.

however, we need a whole number. 305/45 converted into a decimal is 6.7777778 (6.7 recurring). obviously you can't put a fraction of a book onto a shelt, so you round it down to the nearest whole number, which is 6.

final answer: 6

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Simplify and solve for x. 5(x+20)= 7x+30

hodyreva [135]

Answer:

x = 35

Step-by-step explanation:

Solve for x:

5 (x + 20) = 7 x + 30

Expand out terms of the left hand side:

5 x + 100 = 7 x + 30

Subtract 7 x from both sides:

(5 x - 7 x) + 100 = (7 x - 7 x) + 30

5 x - 7 x = -2 x:

-2 x + 100 = (7 x - 7 x) + 30

7 x - 7 x = 0:

100 - 2 x = 30

Subtract 100 from both sides:

(100 - 100) - 2 x = 30 - 100

100 - 100 = 0:

-2 x = 30 - 100

30 - 100 = -70:

-2 x = -70

Divide both sides of -2 x = -70 by -2:

(-2 x)/(-2) = (-70)/(-2)

(-2)/(-2) = 1:

x = (-70)/(-2)

The gcd of -70 and -2 is -2, so (-70)/(-2) = (-2×35)/(-2×1) = (-2)/(-2)×35 = 35:

Answer: x = 35

6 0

3 years ago

Read 2 more answers

In the data set below, what is the interquartile range?<br> 7<br> 1<br> 5<br> 5<br> 9<br> Submit

Marizza181 [45]

Answer:

Step-by-step explanation:

The interquartile range is the difference between the upper quartile and the lower quartile.

First find the median.

The median is the middle value of the data set arranged in ascending order

1 5 5 7 9 ← data in ascending order

↑ median

The lower quartile is the middle value of the data to the left of the median. If there is not an exact middle then it the average of the values on either side of the middle.

1 5

↑ lower quartile = $\frac{1+5}{2}$ = 3

The upper quartile is the middle value of the data to the right of the median.

7 9

↑ upper quartile = $\frac{7+9}{2}$ = 8

Thus

interquartile range = 8 - 3 = 5

3 0

2 years ago

Which lines represent the input and output on a graph

Sveta_85 [38]

Answer:

the horizontal line represents the input aka x

the vertical line represents the output aka y

Step-by-step explanation:

5 0

2 years ago

Find the area of each Triangle given the base<br>b and height be<br>1. B=3 h = 4

Lunna [17]

Answer:

The area of the triangle is 6 square units.

Step-by-step explanation:

The area of a triangle is given by base x height / 2. Based on the info we're given in the question:

$A= \frac{b \times h}{2}\\A= \frac{3 \times 4}{2}\\A=6$

6 0

3 years ago

What is y when x is 893?

garik1379 [7]

The computation shows that the value of y when is 893 will be 1339.5

<h3>How to compute the value?</h3>

It should be noted that when x is 2 y is 3.

Therefore, the value of y when x is 893 will be

= 893 × 3/2

= 1339.5

Therefore, the value of y will be 1339.5

Learn more about computations on:

brainly.com/question/4658834

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When x is 2, y is 3. Then what is y when x is 893?

5 0

1 year ago