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sammy [17]
3 years ago
13

Anna completes a test that had 120 questions for a math competition. Each correct answer is worth +4 points, and each wrong answ

er is worth -2 points. Anna finishes the entire test and receives a score of zero. How many correct and incorrect answers did she have?
Mathematics
2 answers:
Sloan [31]3 years ago
8 0

Answer:

40 correct and 80 incorrect

Step-by-step explanation:

40*4=160

80*2=160

Mademuasel [1]3 years ago
8 0

Answer: 40 Correct and 80 Incorrect

Step-by-step explanation: Every answer she gets correct, she can afford to get 2 answer wrong meaning the number of incorrect answers must be twice the amount of correct. 40(4)=160 80(-2)=160 which evens out to zero

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-8z+(4.5)+3.5z+7y-1.5
bogdanovich [222]

Answer:

  • \boxed{\sf{7y+3-4.5z}}

Step-by-step explanation:

In order to combine like terms, you have to isolate x and y from one side of the equation.

\sf{-8z+\left(4.5\right)+3.5z+7y-1.5}

<u>First, thing you do is remove parentheses.</u>

\Longrightarrow: \sf{-8z+4.5+3.5z+7y-1.5}

<u>Solve.</u>

<u>Then, you combine like terms.</u>

\Longrightarrow:\sf{-8z+3.5z+7y+4.5-1.5}

<u>Add/subtract the numbers from left to right.</u>

-8z+3.5z=-4.5z

<u>Rewrite the problem down.</u>

\Longrightarrow: \sf{-4.5z+7y+4.5-1.5}

<u>Solve.</u>

4.5-1.5=3

\Longrightarrow: \boxed{\sf{7y+3-4.5z}}

  • <u>Therefore, the correct answer is 7y+3-4.5z.</u>

I hope this helps, let me know if you have any questions.

6 0
2 years ago
There are 45 children in a class. If
Dovator [93]

Answer:

20%

Step-by-step explanation:

Total = 45

Absentees = 9

Percentage  = (No. of absentees / total) × 100

                    = 9 / 45 × 100

                    = 0.2 × 100

                    = <u>20%</u>

3 0
3 years ago
Read 2 more answers
Can you help asap pls
jeka94

2 + 2 = 4  5 + 5 = 10 + 4 = 14 your answer is 14

Step-by-step explanation:

4 0
3 years ago
The largest prime factor of thirty-five is _____. 7 5 9 11
vichka [17]

Answer:

7

Step-by-step explanation:

Since 9 and 11 do not factor 35, they are not the answer.

5 is a factor of 35, but not the largest. So, the answer is 7.

7 0
3 years ago
Read 2 more answers
Express M=cos3A + cos A and N = sin3A + sin A as a product form​
elena-14-01-66 [18.8K]

Answer:

2cosAcos2A, 4sinAcos^2A

Step-by-step explanation:

cos3A+cosA

2cos((3A+A)/2)cos((3A-A)/2)

2cos(4A/2)cos(2A/2)

2cosAcos2A

sin3A+sinA

2sin((3A+A)/2)cos((3A-A)/2)

2sin(4A/2)cos(2A/2)

2sin2AcosA

4sinAcos^2A

3 0
2 years ago
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