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?

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bvanesselstine2 bvanesselstine2 · Answer 1 · 2020-09-16T02:20:11+02:00

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)

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mastercookie55 mastercookie55 · Answer 2 · 2020-09-16T02:28:33+02:00

Answer:

[tex]85[/tex]

Step-by-step explanation:

Let [tex]x[/tex] equal the number of questions.

Let's find how many total questions there are:

[tex]100=5x[/tex]

Divide by the coefficient of [tex]x[/tex], which in this case is [tex]5.[/tex]

[tex]20=x[/tex]

So we have a total of [tex]20[/tex] questions, each are worth [tex]5[/tex] points.

Now, Gianna got [tex]3[/tex] questions wrong, and if we know there are [tex]20[/tex] total questions...

[tex]20-3[/tex]

Solve.

[tex]20-3=17[/tex]

So we know Gianna got [tex]17[/tex] questions correct.

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

Again, let [tex]x[/tex] equal the number of questions.

[tex]5x[/tex]

Substitute.

[tex]5(17)[/tex]

Multiply.

[tex]85[/tex]