Select the correct answer from each drop-down menu. desiree is given an aptitude test with 50 multiple-choice questions. for every correct answer, desiree will get 3 points. for every wrong answer, 1 point will be deducted. for every question unanswered, 0.5 point is deducted. desiree did not leave any question unanswered and gets 110 points on the test. if x is the number of questions desiree answered correctly, then the equation that represents the given situation is and the equation will have .

Desiree answered 40 questions correctly

Step-by-step explanation:

Let

x =  number of questions answered correctly

y = number of questions unanswered

z = number of wrong answers unanswered

The system of equations can be expressed

x + y + z = 50

3*x  - 0.5*y -1*z = 110

Desiree did not leave any question unanswered

This means that the equations become

y = 0

x + z = 50

3*x -z = 110

If we add them together, we get

4x = 160

x = 40

z = 10

She answered 40 questions correctly

6 meters

step-by-step explanation:

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.