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jok3333 [9.3K]
4 years ago
9

80% of Vanessa's final grade is based on the average score of her quizzes, which is 73.

Mathematics
1 answer:
Misha Larkins [42]4 years ago
8 0
80% of quizzes + 20% of final = final grade

80% * 73 + 20% * x = 70

0.8 * 73 + 0.2x = 70

58.4 + 0.2x = 70

0.2x = 11.6

x = 58
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I hope this helps!
8 0
3 years ago
Find the x intercepts of the parabola with vertex (-1,-16) and y intercept (0,-15)
Arlecino [84]
<span> first, write the equation of the parabola in the required form: </span>
<span>(y - k) = a·(x - h)² </span>

<span>Here, (h, k) is given as (-1, -16). </span>
<span>So you have: </span>
<span>(y + 16) = a · (x + 1)² </span>

<span>Unfortunately, a is not given. However, you do know one additional point on the parabola: (0, -15): </span>

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<span>.·. a = 1 </span>

<span>.·. the equation of the parabola in vertex form is </span>
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<span>The x-intercepts are the values of x that make y = 0. So, let y = 0: </span>

<span>0 + 16 = (x + 1)² </span>
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<span>We are trying to solve for x, so take the square root of both sides - but be CAREFUL! </span>

<span>± 4 = x + 1 ...... remember both the positive and negative roots of 16...... </span>

<span>Solving for x: </span>
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<span>Or, if you prefer, (3, 0), (-5, 0). </span>
8 0
3 years ago
A parachutist's speed during a free fall reaches 50 meters per second. What is this speed in feet per second? At this speed, how
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d=164 ft/s ⋅20s

=3280ft

Hope This Helps!

7 0
2 years ago
Which of the following is a counterexample for this conditional statement?If an appliance is used for cooling, then it is a refr
Nezavi [6.7K]

Explanation

We are asked to give a counter-example for the given statement

A counter-example is an example that opposes or contradicts an idea or statement.

Therefore, for the statement

we have that

Statement: If an appliance is used for cooling

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Then, the option that contradicts this, will be a clothes dryer

Because a dryer doesn't cool

Hence, the answer is a cloth dryer

option D

4 0
1 year ago
e Ann, Claire, and Josh collect stickers. One week, Ann collects 7 more stickers than Josh. Josh collects twice as many stickers
lisabon 2012 [21]

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4 0
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