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zzz [600]
3 years ago
13

a student earned a grade of 80% on a math test that had 20 problems how many problems on this test did the student answer correc

tly
Mathematics
1 answer:
ki77a [65]3 years ago
4 0

Answer:

16

Step-by-step explanation:

To find 80% of 20, multiply .80 x 20

.80×20 = 16

This is how you multiply percentages--put the decimal point 2 places to the left, then multiply.  In this case, you're looking at 80%, so move the decimal point two places to the left

80.0 becomes .80

Then multiply that by the number you're trying to find the percentage of

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An object has the mass of 900 g and a volume of 1,875 cm3.
romanna [79]

If the mass of the object is 900 g and the volume is 1,875 cm³. Then the density of the object is 0.48 g/cm³.

<h3>What is density?</h3>

Density is defined as the mass per unit volume. It is an important parameter in order to understand the fluid and its properties. Its unit is kg/m³.

The mass and density relation is given as

Density = mass / volume

An object has a mass of 900 g and a volume of 1,875 cm³.

Then the density will be

Density = 900/1875

Density = 0.48 g/cm³

Then the density of the object is 0.48 g/cm³.

To learn more about the density refer to the link;

brainly.com/question/952755

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7 0
3 years ago
In AABC shown below, L is the midpoint of BC, M is the midpoint of AB, and N is the midpoint of
sergij07 [2.7K]

Answer:

<h3>35</h3><h3 />

Step-by-step explanation:

see attached image.

perimeter of trapezoid = sides (6 + 8 + 5 + 8 + 8)

                                     = 35

8 0
4 years ago
In the figure below, if sin x=5/13, what are cos x and tan x
Afina-wow [57]
Please show the figure
4 0
3 years ago
The mean of the following data is 509.
Ganezh [65]

If the mean value of the data set is 509. Then the mean absolute deviation (MAD) for the data set will be 51.5.

<h3>What is the mean absolute deviation?</h3>

It is the average distance between each data point and the mean.

The mean of the following data is 509.

{419, 450, 462, 499, 520, 521, 589, 612}

Then the mean absolute deviation (MAD) for the data set will be

\rm MAD =\dfrac{1}{n}\sum_{i=1}^{n}\left|x_i - \mu \right|

We have

μ = 509

n = 8

Then

\rm MAD =\dfrac{1}{8} \times (|419 - 509| + |450- 509| + ..... + |612 - 509|) \\\\MAD = 51.5

More about the mean absolute deviation link is given below.

brainly.com/question/10258446

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5 0
2 years ago
Help me with this and give the correct answer and get 25 points
love history [14]

Answer:

x =6.0

The base is 6x  = 35.8

The side is 3x =  17.9

Step-by-step explanation:

We can use the pythagorean theorem

a^2 + b^2 = c^2

(6x)^2 +(3x)^2 = 40^2

36x^2 + 9x^2 = 1600

Combine like terms

45x^2 = 1600

Divide each side by 45

45x^2 /45 =1600/45

x^2 =35.555555555

Take the square root of each side

sqrt(x^2) = sqrt(35.555555555)

x =5.96284794 = 6.0

The base is 6x = 6*5.9628479 =35.77708 = 35.8

The side is 3x = 3*5.9628479 =17.88854382= 17.9

7 0
3 years ago
Read 2 more answers
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