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Minchanka [31]
3 years ago
8

Ned took a test with 25 questions. He lost 4 points for each of the 6 questions he got wrong and earned an additional 10 points

for answering a bonus question correctly. How many points do Ned receive overall?
Mathematics
2 answers:
lys-0071 [83]3 years ago
6 0
Ned got an overall grade of 86 percent because if each question is 4 points, then 6×4=24 but if he got a bonus 10 points, then you can do 24-10=14 and then you do 100-14 which equals your answer: 86.
Karo-lina-s [1.5K]3 years ago
6 0
-6 × 4 = -24
-24 + 10 = -14
100 - 14 = 86 points
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It looks like it’s already answered I’m confused about that
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2 years ago
Jon is launching rockets in an open field. The path of the rocket can be modeled by the quadratic function h(t) = -16t^2 + 96t,
IrinaVladis [17]
It will reach 80 feet for the second time after 5 seconds.

We set the equation equal to 80 feet:
80= -16t² + 96t

When solving quadratics, we want it equal to 0, so we subtract 80 from both sides:
80-80= -16t² + 96t - 80
0= -16t² + 96t - 80

We use the quadratic formula to solve:
t=\frac{-96\pm \sqrt{96^2-4(-16)(-80)}}{2(-16)}
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\\t=\frac{-96\pm \sqrt{9216-5120}}{-32}
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\\t=\frac{-96\pm \sqrt{4096}}{-32}
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4 0
3 years ago
If y=4 when x=12, find y when x=-24
goldfiish [28.3K]

The value of y is -8 if the x  -24 and y varies directly with x, and If y = 4 when x = 12.

<h3>What is a proportional relationship?</h3>

It is defined as the relationship between two variables when the first variable increases, the second variable also increases according to the constant factor.

The question is incomplete.

The complete question is:

If y varies directly with x, and If y = 4 when x = 12, how do you find y when x = -24?

y ∝ x  (given)

y = kx

k is the constant of proportionality.

4 = 12k  (y = 4, and x = 12)

k = 1/3

y = x/3

Plug x = -24

y = -24/3

y = -8

Thus, the value of y is -8 if the x  -24 and y varies directly with x, and If y = 4 when x = 12.

Learn more about the proportional here:

brainly.com/question/14263719

#SPJ1

3 0
1 year ago
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algol [13]
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3 years ago
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4.243

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