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2 years ago

A+5=5a+5 how do i do this problem

Mathematics

1 answer:

Natali5045456 [20]2 years ago

5 0

Answer:

0 = a

Step-by-step explanation:

The first thing to do is subtract 5 from both sides.

a + 5 = 5a + 5

- 5 - 5

The 5's cancel out.

Now we have a + 0 = 5a

You next subtract the a from both sides.

a + 0 = 5a

-a -a

0 = 4a

Lastly would to get a by itself so then we divide 4 from both sides

0 = 4a

_ _

4 4

0 = a

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What is the relationship between the magic constant (the sum of each row) and the sum of all the numbers in the square? Why does

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Let's say each row sums to 15

If we had 3 rows, then the total sum would be 3*15 = 45

If we added all of the values in the 3x3 magic square, then we'd get 45 as well.

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2 years ago

Use the line of best fit to estimate the French score for a student who got 65 in maths.

just olya [345]

Using a linear function, it is found that the estimated French score is of 38.1875.

A linear function has the following format:

$y = mx + b$

In which:

m is the slope.

b is the y-intercept.

Searching the problem on the internet, it is found that two points of the line of best-fit are: (10,65) and (90,26).

The slope is given by change in the output divided by the change in the input, hence:

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Then:

$y = -0.4875x + b$

Point (10,65) means that when $x = 10, y = 65$ , and this is used to find b.

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Hence:

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For a student who got 65 in math, x = 65, and hence:

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For more on linear functions, you can check brainly.com/question/16302622

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A 120-ft long playground is just 15in. on the scale drawing. What is the scale on the scale drawing?

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15 in:120 f
------ -----
15 15
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Every inch equals 8 ft.

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