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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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A kite flying in the air has an 7-ft line attached to it. Its line is pulled taut and casts a 5-ft shadow find the heights of th
Stels [109]

The height of the kite is 4.89 feet

Explanation

The length of the line attached to the kite=7 feet

The length of the shadow that is cast on the ground=5 feet

the system forms a right angled triangle where the taught string of the kite is the hypotenuse, the shadow is the base and the height of the kite above the ground is the height.

H=7 feet

b=5 feet

using pythagoras theorem

h^2+b^2=H^2\\h^2=H^2-b^2\\h^2=7^2-5^2\\=49-25\\=24\\h=\sqrt{24\\} =2\sqrt{6} \\=4.89 feet

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3 years ago
What is the square root of 6144
Artyom0805 [142]

Answer:

78.38

Step-by-step explanation:

5 0
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Answer:

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3 0
2 years ago
Last week, Benjamin spent $82.80 on groceries and $132.48 on bills. The amount he spent on groceries
Genrish500 [490]

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amount spend on groceries = 82.80

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Step-by-step explanation:

6 0
3 years ago
What is the range of the function y=2x+1 for the domain 2<=x<=5?
egoroff_w [7]
So domain is the number you can use
range is the output your get from inputting the domain given
so from 2≤x≤5
since it is linear, we can be sure that we only need to test the endpoints of the domain to find the endpoints of the range

sub 2 for x
y=2(2)+1
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sub 5 for x
y=2(5)+1
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so range is from 5 to 11
in interval notation: [5,11]
in other notation 5≤y≤11
or
R={y|5≤y≤11}
5 0
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