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professor190 [17]
3 years ago
5

Mary took a math test and she got four questions incorrect and 21 correct. What percent did answer correctly?

Mathematics
1 answer:
AnnZ [28]3 years ago
6 0

Answer:

84%

Step-by-step explanation:

21 correct + 4 wrong = 25 questions in total

\frac{21}{25} x 4 = \frac{84}{100}

\frac{84}{100} = 0.84

0.84 = 84%

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A right triangle is displayed.<br> 36 in<br> 60 in<br><br><br> The area of the right triangle is
devlian [24]

Answer:

864 in²

Step-by-step explanation:

Use the pythagorean theorem to find the missing side.

36²+x²=60² (x is the missing length of the side)

1296 + x² = 3600

x² = 2304

x = 48

Then use the area of a triangle formula: base·height/2

Substituting 36 for the height and 48 for the base, we get:

48·36/2, which is <u>864</u>.

3 0
3 years ago
which of the following best describes the bases of a cylinder? A. Congruent B. Polygons C. Parallel D. Discs (Check All That App
mrs_skeptik [129]

Answer:

A. Congruent and D. Discs

Step-by-step explanation:

You won't see a cylinder that doesn't have congruent bases

Look at the shape of the bases and look at a disc compare their shape

4 0
3 years ago
97) If the average of 3a and 4b is less than 50 and a is twice b, what
oee [108]

The average of 3a and 2b satisfies

\dfrac{3a+4b}2

Then

a=2b\implies\dfrac{3(2b)+4b}2=5b

a=2b, so if a must be an integer, then the largest integer value it can take on is 19 if b can be a rational number (in which case b=9.5) or 18 if b must also be an integer.

Given that none of the provided answer choices lists 18 or 19, I'd bet there's a typo and you're supposed to find the maximum integer value of b, in which case the answer would be B as the largest integer value would be 9.

3 0
3 years ago
Please help pre algebra it’s super hard
Rzqust [24]

Answer:

a reflection and then a translation

a translation and then a rotation

a rotation and then a reflection

Hope this helps

7 0
3 years ago
Patrick's favorite shade of purple paint is made with 4 ounces of blue paint for every 3ounces of red paint.
Elan Coil [88]
The ratio of Blue to red in the purple shade that Patrick wants is:
Blue:red=4:3
The mixtures that will create the same shade of purple is:

<span>a] 8ounces of blue paint mixed with 6ounces of red paint
because the ratio of blue to red is 4:3
and
b] </span><span>20 ounces of blue paint mixed with 15 ounces of red paint
because the ratio of blue to red is 4:3</span>
6 0
3 years ago
Read 2 more answers
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