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snow_lady [41]
3 years ago
9

Suppose you are taking a multiple choice exam with 61 questions, each with 4 possible answers. If you were to guess at random fo

r each question, how many questions would you expect to get right
Mathematics
1 answer:
Brut [27]3 years ago
7 0

Answer:

15.25

Step-by-step explanation:

The probability of getting a question right is 1/4 because there are 4 possible answers, and you're just guessing randomly.

You can expect to get 1/4 of the questions right.

\frac{1}{4}\times 61 =15.25

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Help find the angle of k please
Rudiy27

Answer:

k+27=180(co-interior angle)

k=180-27=153°

7 0
3 years ago
29. (09.04 MC)
lara [203]

Answer:

The center is located at (-1, -2), and the radius is 5.

Step-by-step explanation:

The general equation of a circle is given as

(x - a)^2 + (y - b)^2 = r^2

where

a and b are the centre of the circle and r is the radius

Given the equation

x2 + 2x + y2 + 4y = 20

add 1 ad 4 to both sides

x2 + 2x + 1 + y2 + 4y + 4 = 20 + 4 + 1

factorise

(x +1)^2 + (y+2)^2 = 5^2

comparing with the general equation

a = -1, b = -2, r = 5 (all measured in units)

7 0
3 years ago
Mr. Williamson bought 4 boxes of chewy granola bars and 5 boxes of crunchy granola bars. Each box contained the same number of g
Marta_Voda [28]

Answer: There were 8 granola bars in each box, x = 8.

Step-by-step explanation:

The first step is write an equation:

4x + 5x = 72

The second step is to combine like terms:

4x + 5x = 72

9x = 72

Step 3 is to use the properties of equality and inverse operations to solve the equation:

9x/9 = 72/9

x = 8

Since x = 8, there were 8 granola bars in each box.

I hope I helped and have a great day! Please mark me brainliest. ^-^

8 0
3 years ago
Read 2 more answers
Francis big just enough cookies to fill all the orders that is bakery while the cookies were calling kitchen assistant knock ove
Pavel [41]
Let's say that x = the total number of biscuits ordered.
This means that 0.12 x x = 36.
so x = 36 x 12
x = 300 - the number of biscuits ordered.

3 0
3 years ago
mason took 9.4 minutes to complete the first challenge in the champs challenge. He completed the second challenge 2.65 minutes f
Ivahew [28]
The answer to that question is 6.75 I hope I helped you.
5 0
3 years ago
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