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3 years ago

Janet solves 6 questions from a math assignment.

2 answers:

6 0

6 out of x questions are answered.

Lets set up a proportion:

6/x = 30/100
100 here acts as the whole number that we currently don't know of.

6*100 = 600
30x = 600
x = 20

There are 20 total questions on the test in this case.

Angelina_Jolie [31]3 years ago

4 0

30% of his questions was 6 questions.
Translate that to a math equation where q= total number of questions.
30% x q = 6
.3 x q = 6
q= 6/.3
q= 20

There were 20 questions in the test.
And 30% of 20 is 6 so that is the correct answer.

Hope this helps :)

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MrMuchimi

Step-by-step explanation:

$2 \frac{1}{2} y = \frac{5}{8}$

Convert Mixed number to improper fraction.

$2 \frac{1}{2} = \frac{5}{2}$

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3 years ago

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Vitek1552 [10]

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$-6(1.4-r)$

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Then move over 6r to the front

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I need to know how to do the answer and why that’s the anwer

Pavel [41]

Ok so the answer is
$4 {x}^{2}$

so we multiply numbers that have the same variable

$2 {x}^{3} \: \: \times {2x}^{ - 1} \\ \\$
multiply 2 x 2

$2 \times 2 = 4$
then multiply the exponents

$x ^{3} \times x ^{ - 1}$
multipling like this will look like addition.
${x}^{3} \times {x}^{ - 1} = {x}^{2}$
so in other words you could do it like this too
${x}^{3} + {x}^{ - 1} = {x}^{2}$
now add the exponent with 4
$4 + {x}^{2} = 4x ^{2}$

now for the last part
${y}^{3} + {y}^{ - 3} = 0$
because -3 and 3 added together make 0
$0 + 4 {x}^{2} = 4 {x}^{2}$
I hope this help(it looks complicated but it's very easy and I hope I helped you out)

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3 years ago