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Hatshy [7]
2 years ago
13

Holly scored an 88, 91, 89, 84, and a 98 on the last five math tests. What is her mean test score?

Mathematics
1 answer:
zaharov [31]2 years ago
7 0

Answer:the mean is 90

Step-by-step

you find the sum of the values then divide them by the amount of numbers in the set

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60 60 and 60. Hope I helped!
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3 years ago
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A system for tracking ships indicated that a ship lies on a hyperbolic path described by 5x2 - y2 = 20. the process is repeated
zysi [14]
Answer:
The ship is located at (3,5)

Explanation:
In the first test, the equation of the position was:
5x² - y² = 20 ...........> equation I
In the second test, the equation of the position was:
y² - 2x² = 7 ..............> equation II
This equation can be rewritten as:
y² = 2x² + 7 ............> equation III

Since the ship did not move in the duration between the two tests, therefore, the position of the ship is the same in the two tests which means that:
equation I = equation II

To get the position of the ship, we will simply need to solve equation I and equation II simultaneously and get their solution.

Substitute with equation III in equation I to solve for x as follows:
5x²-y² = 20
5x² - (2x²+7) = 20
5x² - 2y² - 7 = 20
3x² = 27
x² = 9
x = <span>± </span>√9

We are given that the ship lies in the first quadrant. This means that both its x and y coordinates are positive. This means that:
x = √9 = 3

Substitute with x in equation III to get y as follows:
y² = 2x² + 7
y² = 2(3)² + 7
y = 18 + 7
y = 25
y = +√25
y = 5

Based on the above, the position of the ship is (3,5).

Hope this helps :)
8 0
3 years ago
If sin(2x)=cos (x+30°), what is the value of x?
Murljashka [212]

Answer:

x=20

Step-by-step explanation:

Please mark as brainliest

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3 years ago
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Answer:

Step-by-step explanation:

Pi is a number - approximately 3.142. It is the circumference of any circle divided by its diameter. The number Pi, denoted by the Greek letter π - pronounced 'pie', is one of the most common constants in all of mathematics. It is the circumference of any circle, divided by its diameter.

First 100 decimal places

3.1415926535 8979323846 2643383279 5028841971 6939937510 5820974944 5923078164 0628620899 8628034825 3421170679 ...

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3 years ago
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I will give u brianliest
Bond [772]

Answer:

1: 3×2

2: y^6

Step-by-step explanation:

1:

Multiply the numbers: y(^3^*^2)

3*2 = 6

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2:

(y^3)^2

Apply exponent rule : (a^b)^c=a^b^c, assuming a\geq 0

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