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alekssr [168]
3 years ago
7

Gianna is taking a multiple choice test with a total of 100 points available. Each question is worth exactly 5 points. What woul

d 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?
Mathematics
2 answers:
tatiyna3 years ago
8 0

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)

malfutka [58]3 years ago
6 0

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

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