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3 years ago

Ethan correctly answers 80% of the total questions on his history test. Enter the number of questions on Ethan’s history test.

Mathematics

2 answers:

jasenka [17]3 years ago

8 0

It might be about 20 questions

Citrus2011 [14]3 years ago

5 0

Since you didn't give me a total # of questions on the test, I can't give you a direct answer....

But I can walk you through.

In math, "of", means you have to multiply.

80%= .8 This is bc 100% is = 1.00.
() mean times or multiplied by
====================================================================
So you would do .8(how ever many total questions were on the test)
Whatever # you get is the answer.

Hope I could help!!!

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The denominator of a rational number is greater than its numerator by 5. If 5 is subtracted from the numerator and 4 is added to

nasty-shy [4]

Answer:

7/12.

Step-by-step explanation:

=x/x+5.

x-5/x+5+4=⅛

x-5/x+9=⅛

x-5=⅛(x+9)

x-5=⅛x+1⅛

x-⅛x=1⅛+5

⅞x=49/8

7x=49

x=7

thus the initial fraction is x/x+5= 7/12

A rational number is a fraction

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4 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Derick solves the problem below.

Gala2k [10]

As it is proved that the equation has no solution, Derick is correct

Step-by-step explanation:

Given

$-3(4n + 2) = -4n + -2 (4n - 6)$

We have to solve the equation in order to check if Derick was solved the equation correctly or not.

So,

Applying distributive property first

$-12n -6 = -4n -8n +12\\-12n-6 = -12n+12\\-12n+12n-6 = 12\\-6 = 12$

As the variable is already cancelled in the equation there is no unique solution.

In order for an equation to have infinite solutions the constant on both sides of equation should be same which is not the case in the given equation

So,

As it is proved that the equation has no solution, Derick is correct

Keywords: Linear equations, variables

Learn more about linear equations at:

#LearnwithBrainly

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3 years ago