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Mathematics

1 answer:

Vladimir79 [104]4 years ago

7 0

<span>Simplifying y = 3.85 + 0.55x Solving y = 3.85 + 0.55x Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Simplifying y = 3.85 + 0.55x

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4 years ago

Sarah answered 24 questions on her test correctly and earned an 80%. How many questions were on the test?

MaRussiya [10]

Answer:

43 questions in total

Step-by-step explanation:

the original equation with the unknown (total number of questions on the test) will look like this

$\frac{total \: number \: of \: questions \: on \: exam}{24 \: answered \: questions} = 80\%$

we know this because to work out a percentage in the 1st place you need the total ÷ number (in this case it's ÷ how many questions out of the total she did answer)

now you rearrange.

you need to move the 24 to get the total on it's own here's how you do it

$\frac{tot \: num \: of \: qs}{24} \times 24 = 80\% \times 24$