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Nostrana [21]
3 years ago
14

A chimp is taking a multiple - choice test of course the chip can't read and his guessing for every question. If there are 4 cho

ices for each question, and there 84 questions on the test, how many questions can we expect the chimp to answer correctly? There is a25% chance that the chimp will guess correctly
Mathematics
1 answer:
tia_tia [17]3 years ago
6 0

Answer:

21

Step-by-step explanation:

He will guess correctly 25% of the time.

He has 84 questions

25% of 84

.25 * 84

21

We should expect that he will get 21 questions correct

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There are 40 boys in a computer club. The ratio of girls to boys is 2 to 5. How many girls are in the club?
Mandarinka [93]
Set up a proportion. 2/5 = x/40
to solve the equation first cross multiply.
x*5=40*2
x*5=80
now divide both sides by 5, 80 divided by 5 is equal to 16.
so the number of girls in the computer lab is 16. 
4 0
3 years ago
Read 2 more answers
: 88, 87, 89 90, 87, 85, 88, 91, 86, 86, 88, 89<br>what's is the inerquartile range​
andreyandreev [35.5K]
I think 88 i don’t really know
8 0
3 years ago
The square below represents one whole.
sergij07 [2.7K]

Answer:

Decimal: 0.23

Fraction: 23/100

Percent: 23%

Step-by-step explanation:

In this case, one whole is 100. This is because there are 100 little squares in the one big square.

The amount of shaded squares is 23.

This can be represented as the fraction 23/100. 23/100 is the same as 23 being divided by 100. 23 divided by 100 is 0.23 (our decimal). To find a percent, move the decimal point to the right 2 times. Our percent is 23%.

6 0
3 years ago
X^2 - 8x + 5 = 0
PtichkaEL [24]
<h2>Answer:</h2>

√44

2 Real Roots

<h2>Step-by-step explanation:</h2>

Looking at the image attached, the discriminant is the value under the square root.

In the equation given:

a = 1

b = -8

c = 5

The discriminant is therefore:

√(b²- 4ac) = √(-8²- (4*1*5)) = √(64-20) = √44

√44 is a positive number. Because it is positive, there must be 2 real roots.

If it were negative, there would be 2 imaginary roots.

If it were zero, there would be 1 real root.

8 0
2 years ago
Refer to the image. (Actually read it)
Korvikt [17]

Answer:

(4, 5)

Step-by-step explanation:

5x + y = 25

-3x + 2y = -2

5x + y = 25

y = 25 - 5x

-3x + 2 * (25 - 5x) = -2

-3x + 50 - 10x = -2

-13x = -52

x = 4

5 * 4 + y = 25

20 + y = 25

y = 5

Solution: (4, 5)

8 0
2 years ago
Read 2 more answers
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