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PIT_PIT [208]
3 years ago
15

A teacher wanted to prevent students from guessing answers on a multiple-choice test. The teacher graded 5 points for a correct

answer, 0 points for no answer, and -2 points for a wrong answer. Michelle answered 17 questions correctly, left 3 blank, and had 5 wrong answers. She also got 8 out of 10 possible points for extra credit. What was her final score?
Mathematics
2 answers:
Leona [35]3 years ago
7 0

Answer:

<h2>Hello </h2>

Step-by-step explanation:

  • His Total score will be 85
  • As he had answered 17 questions correctly and the point for correct answer is 5 .
  • so add 5 seventeen times and you'll get 85
  • He left three answers blank we won't add these points
  • As he had five wrong answers the teacher won't add these points
<h2>So, the total score is 85 </h2>

<h3>#hope</h3>
ZanzabumX [31]3 years ago
5 0

Answer:

While slavery was the major issue separating the North and South, it was not slavery itself that sparked the conflict. The South wanted to secede from the Union, and the North refused. While President Abraham Lincoln personally opposed slavery, he recognized that it was legal under the U.S. Constitution at the time. He also recognized that few in the North were ready to go to war to free the slaves. For Lincoln and the northern majority, preservation of the Union was the foremost goal.

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An airplane flying into a headwind travels the 1800-mile flying distance between New York City and Albuquerque, New Mexico in 3
Anton [14]

Answer:

plane speed = 520 mph

wind speed = 20 mph

Step-by-step explanation:

let the speed of the wind be w mph and the speed of the plane be p mph

flying from NY to NM,

time taken = 3 hr 36 min = 3.6 hr

average ground speed = total distance / time taken

= 1800 / 3.6 = 500 mph

since it is a headwind, the plane speed will be slowed down by the head wind, resulting in a lower ground speed.

we can write the following equation:

ground speed = plane speed - wind speed

500 = p - w ------(eq1)

flying from NY to NM (return flight),

time taken = 3 hr 20 min = 3.333 hr

average ground speed = total distance / time taken

= 1800 / 3.333 = 540 mph

on the return trip, the headwind becomes a tailwind, hence the total ground speed would be faster than the plane's air speed , we can write the following equation:

ground speed = plane speed + wind speed

540 = p +  w ------(eq2)

with these 2 systems of equations, we can solve for p & w using either substitution of elimination method.

eventually you will end up with

plane speed = 520 mph

wind speed = 20 mph

4 0
3 years ago
Read 2 more answers
Game Go charges $0.79 per game rental and a membership fee of $24. Action Games charges $1.19 per game rental. With how many gam
nexus9112 [7]

Answer:

x=60

Step-by-step explanation:

Simplifying

0.79x + 24 = 1.19x

Reorder the terms:

24 + 0.79x = 1.19x

Solving

24 + 0.79x = 1.19x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-1.19x' to each side of the equation.

24 + 0.79x + -1.19x = 1.19x + -1.19x

Combine like terms: 0.79x + -1.19x = -0.4x

24 + -0.4x = 1.19x + -1.19x

Combine like terms: 1.19x + -1.19x = 0.00

24 + -0.4x = 0.00

Add '-24' to each side of the equation.

24 + -24 + -0.4x = 0.00 + -24

Combine like terms: 24 + -24 = 0

0 + -0.4x = 0.00 + -24

-0.4x = 0.00 + -24

Combine like terms: 0.00 + -24 = -24

-0.4x = -24

Divide each side by '-0.4'.

x = 60

Simplifying

x = 60

8 0
4 years ago
Daniel bought 4 packages of ribbon for $0.80 each, 2
Anastasy [175]

Answer:Around $24.19, I think

Step-by-step explanation:

4 0
3 years ago
Which of the following sets is closed under multiplication?
andrezito [222]

B. {1,2}  because they are both whole numbers 0 is not one.

(Proof: Whole Numbers: This set is closed only under addition and multiplication. Integers: This set is closed only under addition, subtraction, and multiplication. Rational Numbers: This set is closed under addition, subtraction, multiplication, and division (with the exception of division by 0)"

7 0
3 years ago
Read 2 more answers
You put $5,000 in a simple interest account at a bank. You will earn $1,200 in just 4 years. What is the annual interest rate fo
bogdanovich [222]
The annual interest rate is 6%
7 0
3 years ago
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