Question

Gianna is taking a multiple choice test with a total of 100 points available. Each question is worth exactly 5 points. What would be Gianna's test score (out of 100) if she got 3 questions wrong? What would be her score if she got xx questions wrong?

Answer 1

Answer:

Her test score would be an 85 because 5x3=15 and then you would subtract 15 from 100 which would be 85

equation would be x=100-(5y)

Answer 2

Answer:

$85$

Step-by-step explanation:

Let $x$ equal the number of questions.

Let's find how many total questions there are:

$100=5x$

Divide by the coefficient of $x$, which in this case is $5.$

$20=x$

So we have a total of $20$ questions, each are worth $5$ points.

Now, Gianna got $3$ questions wrong, and if we know there are $20$ total questions...

$20-3$

Solve.

$20-3=17$

So we know Gianna got $17$ questions correct.

Let's use an expression to figure out her score.

Again, let $x$ equal the number of questions.

$5x$

Substitute.

$5(17)$

Multiply.

$85$