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Bas_tet [7]
2 years ago
8

A science test has 20 questions. A student answers 80% of the questions correctly.

Mathematics
1 answer:
natita [175]2 years ago
8 0

Answer:

16 questions answered correctly

Step-by-step explanation:

Since the student answered 80% of the questions correctly, we can find 80% of 20 to answer this question.

[] First we will convert the percent into a decimal format;

80% / 100 = 0.8

[] Then we will multiply this by 20 to find our answer;

20 * 0.8 = 16 questions answered correctly

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Which of the following options have the same value as 15% of 20?
AnnZ [28]
Answers are: A, C, D

Note how
(3/20)*20 = 0.15*20 = 3
0.15*20 = 3
(15/100)*20 = 0.15*20 = 3
all expressions lead to the same result of 3

another thing to notice
3/20 = 15/100 = 0.15 = 15%
which are multiple ways to say the same thing just in a different form
5 0
3 years ago
The probability of winning a game is 40%. You play 60 times. How many times do you expect win? PLZZZZZ HELP MEEE!!!!
Molodets [167]
You espect wint the 40% of 60:
40% of 60=(40/100)*60=(40*60)/100=24

Answer: you expect win 24 times.
4 0
3 years ago
Read 2 more answers
The two triangles are similar.
prohojiy [21]
I believe it is 60 inches
3 0
2 years ago
The area in square feet of a rectangular field is x^2-100x+2400. The width, in feet is x-40. What is the length, in feet?
sattari [20]

Answer:

x-60

Step-by-step explanation:

You have to factor out the quadratic.

You know that one of the factors is x-40.

To factor:

Find a number that when added to -40, gives you -100, and also when multiplied, gives you 2400.

That such number is -60.

Add an x before it, and you get (x-60)

3 0
3 years ago
For altitudes up to 36,000 feet, the relationship between ground temperature and atmospheric
Anon25 [30]

Answer:

a=16400 feet

Step-by-step explanation:

t = -0.0035 a +g

-17.40 = -0.0035 a+40

-17.40-40=-0.0035a+40-40

-57.40=-0.0035a

a = -57.40/-0.0035

a=16400 feet

7 0
3 years ago
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