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3 years ago

Any help is appreciated:)

Mathematics

2 answers:

Alisiya [41]3 years ago

7 0

Answer:

Answer choice C which is (4, 2/5)

Step-by-step explanation:

Okay we are going to do the same like we did in the last question. :)

We have to plug in each answer into the equation and see if it is a true statement.

Lets begin with answer choice A. (7,-2)

2(7) + 10(-2) = 12 = -4 = 12 This answer is false because -4 doesn't equal 12.

Next answer, (-5,-4)

2(-5) + 10(-4) = 12 = -10 + -40 = 12 = -50 = 12 This is also wrong because -50 doesn't equal 12.

Next answer, (4,2/5)

2(4) + 10(2/5) = 12 12 = 12 This is CORRECT because 12 equals 12.

We know the last 2 options are wrong.

Sorry for taking a while to respond.

defon3 years ago

5 0

I think the answer to that is 21

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Bryce tried to solve an equation step by step. \qquad\begin{aligned} \dfrac83&=3\left(c+\dfrac53\right)\\\\ \\ \dfrac83&

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$\qquad\begin{aligned} \dfrac83&=3\left(c+\dfrac53\right)\\\\ \\ \dfrac83&=3c+\dfrac53&\green{\text{Step } 1}\\\\ \\ 1&=3c&\blue{\text{Step } 2}\\\\ \\ \dfrac13&=c&\purple{\text{Step } 3}\\\\ \end{aligned}$

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$\dfrac83&=3\left(c+\dfrac53\right)\\\\ \\$

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8/3 = 3c + 3(5/3)

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Step 3: Multiply both sides by 1/3

-7/3 * 1/3 = 3c * 1/3

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Swap

c = -7/9

From the calculation, we can see that Bryce is wrong in step 1 because he did not distribute 3 over 5/3 thereby making his solution incorrect

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