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never [62]
3 years ago
12

Reuben has scores of 70,75,83, and 80 on four spanish quizzes. what score must he get on the next quiz to achieve an average of

at least 80?
Mathematics
2 answers:
Ludmilka [50]3 years ago
6 0
Ok well If he gets a 92 percent he will have a 80!! :)

Sergio [31]3 years ago
4 0
X - the score he must get

\frac{70+75+83+80+x}{5} \geq 80 \\
\frac{308+x}{5} \geq 80 \\
308+x \geq 400 \\
x \geq 92

He must get at least 92 points.
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What is the maximum vertical distance between the line y = x + 56 and the parabola y = x2 for −7 ≤ x ≤ 8?
atroni [7]
-7 and 8 are the solutions to the given equation system.
Therefore, the maximum distance between the y values of the two equations must lie exactly between their points of intersection. That is on x value:
x = (-7 + 8)/2 = 0.5
The maximum distance is:
y = 0.5 + 56 = 56.5
y = 0.5² = 0.25
56.5 - 0.25 = 56.25 units
5 0
3 years ago
Can someone please help me with these 7th grade math questions
larisa86 [58]

Answer:

The rule is y=60

Step-by-step explanation:

If you divide 180 by 3, you get 60.

Now, find all the y's to x's up until you get to 11 and plot the points on the graph.

7 0
3 years ago
Find the mean, median, mode, and range of this data: 49, 49, 54, 55, 52, 49, 55. If necessary, round to the nearest tenth. A. 51
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The answer is A.

Hope I helped.
3 0
3 years ago
Computers and calculators are being sold at 25% off. Jean buys a calculator that is regularly priced at $75. How much does he pa
Pavlova-9 [17]

Answer:

25% of $75

25% ÷$75

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8 0
3 years ago
An urn contains six red balls numbered 1, 2, 3, 4, 5, 6, two white balls numbered 7, 8, and two black balls numbered 9, 10. A ba
Svetradugi [14.3K]

Answer:

2/10 = 1/5

Step-by-step explanation:

To figure out the probability of something, we can take

(number of outcomes of that something) / (number of total outcomes)

Here, we are trying to find the probability that the ball is white. The number of outcomes that are possible with the ball being white is 2, as there are two white balls and you can only pick one. You can pick either of the two white balls, but there is no way to pick one of them two times, pick two of them at once, or pick any other ball and have it be white.

The number of total outcomes is 10. There are 10 balls, and you can only pick one ball at a time. There are only 10 options to choose from.

Therefore, we can plug our numbers into the formula above and get 2/10 = 1/5 as our probability

8 0
2 years ago
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