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?

Step-by-step explanation:

Let equal the number of questions.

Let's find how many total questions there are:

Divide by the coefficient of , which in this case is

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

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

Solve.

So we know Gianna got questions correct.

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

Again, let equal the number of questions.

Substitute.

Multiply.

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40

they would have to work 32 hours.