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3 years ago

6x+7=8x-13 solve linear equations

Mathematics

1 answer:

dmitriy555 [2]3 years ago

3 0

When solving equations that have only one type of variable, you just get the variable on one side and the numbers on the opposite side.

6x + 7 = 8x - 13

Let us get the x on the left side.

Subtract each side of the equation by 8x.

6x + 7 = 8x - 13

-2x + 7 = -13

Subtract 7 from each side of the equation.

-2x = -20

Divide both sides by the coefficient of x. Which is -2.

x = 10

So, x is equal to 10 for this equation.

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Step-by-step explanation:

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3 years ago

What is the slope of the line of (6,22) and (15,55) please simplify

Dennis_Churaev [7]

Answer:

11/3

Step-by-step explanation:

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4 years ago

If the endpoints of AB are at (-4, 5) and (2, -7), what is the length of AB?

Sonbull [250]

Answer:

The length of AB is $6\sqrt{5}$ units

Step-by-step explanation:

The rule of the distance between two points (x1, y1) and (x2, y2) is

$d=\sqrt{(x2-x1)^{2}+(y2-y1)^{2}}$

∵ The endpoints of AB are (-4, 5) and (2, -7)

→ Let point (-4, 5) be (x1, y1) and point (2, -7) be (x2, y2)

∴ x1 = -4 and y1 = 5

∴ x2 = 2 and y2 = -7

→ Substitute them in the rule above to find the length of AB

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∴ $AB=\sqrt{(6)^{2}+144}=\sqrt{36+144}$

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3 0

3 years ago

If the mean of 5 numbers is 36, what is the 5th number if four of the

Burka [1]

Answer:

Step-by-step explanation:

To find the mean of 5 numbers, you add the 5 numbers and divide by 5.

Let the unknown number = x.

(27 + 42 + 43 + 35 + x)/5 = 36

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Answer: 33

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3 years ago

Start from 110 feet away, a person on a bicycle rides towards a checkpoint and then passes it. The rider is travelling at a cons

Savatey [412]

Answer:

a. 2.3 sec and 5 sec

Step-by-step explanation:

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110/30 = t ≈ 3.67

This will be the average of the two times, so their sum is ...

t1 +t2 = 2×3.67 = 7.3

Only one answer choice has a sum of 7.3 seconds:

2.3 sec and 5 sec

7 0

3 years ago