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3 years ago

Choose the axiom that allows b(7) to be written 7b.

1 answer:

3 0

I believe it is the commutative property of multiplication. If this helped, please mark me brainliest, thank you and if you need more help, feel free to message me!

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How to solve and respond.

son4ous [18]

Step-by-step explanation:

the error:

it is stated that

$\frac{5x}{x+7} +\frac{7}{x} = \frac{5x}{x+7} +\frac{7(7)}{x+7}$

subtract (5x)/(x+7) from both sides

$\frac{7}{x} = \frac{7(7)}{x+7}$

multiply both sides by x + 7

7(x+7) = 49x

7x + 49 = 49x

subtract 7x from both sides to isolate x and its coefficient

49 = 42x

thus, this is only true when 49 = 42x. in order for these two equations to be equal, they must always be true, so this is wrong

the solution:

we want to express 7/x as (something) / (x+7). to do this, we can multiply 7/x by 1.

anything divided by itself = 1. thus, if we multiply both the numerator and the denominator by something that turns x into (x+7), we can do what we want to do.

(x+7)/x * x turns x into (x+7), so we multiply both the numerator and denominator by (x+7)/x to get

$\frac{7}{x} = \frac{7(x+7)/x}{x+7}$

substitute this for 7/x in our original problem

$\frac{5x}{x+7} +\frac{7(x+7)/x}{x+7} = \frac{5x}{x+7} +\frac{(7x+49)/x}{x+7} = \frac{5x}{x+7} +\frac{7+49/x}{x+7} = \frac{5x+7+49/x}{x+7}$

3 0

2 years ago

bus a and bus b leave the bus depot at 4pm. Bus a takes 15 minutes to do its route and bus b takes 35 minutes to complete its ro

serious [3.7K]

Answer:

4.35pm is the later time, both buses were together back at the depot.

Reasons;

As bus b did not return his return route until 35 minute after departure.

We can say this was a return route taking 35 minute as the question does not point out length of time getting back. We therefore state it is a return route in the workings to explain how we found the answer.

Step-by-step explanation:

4.00 + 0.35 = 4.35 = b

4.00 + 0.15 = 4.15 = a

4.35 is the later time.

8 0

2 years ago

PLS HELP ASAP!!! <3

satela [25.4K]

The answer would be C. A is the same angle and Lines AE=AB and AC=AD

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3 years ago

Find the slope of the line. A. 1/2 B. -1/2 C.-2 D.2

ki77a [65]

Answer: yea -1/2 is the slope

Step-by-step explanation:

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2 years ago

Your family has decided to put a rectangle patio in your backyard similar to the shape of your backyard. Your backyard has a len

Fudgin [204]

Answer:

The answer is 80, give me brainliest answer:)

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2 years ago