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4 years ago

Selina is playing a game that uses the spinner below.

Mathematics

1 answer:

MatroZZZ [7]4 years ago

4 0

Answer:

A) 12.5%

B) 50%

C) 50%

Step-by-step explanation:

For A, 7 is one of the 8 possibilities (1/8). 1/8 of 100 is 12.5, so your chance of spinning a 7 is 12.5%

For B, even numbers are 4/8 or 1/2 of your options. 1/2 of 100 is 50, so your chance of spinning an even number is 50%

For C, there are 4 out of 8 numbers that are prime (2,3,5, & 7).

4/8 or 1/2 of 100 is 50, so your chance of spinning a prime number is 50%

hope this helps

You might be interested in

Select the correct answer from the drop-down menu.

saul85 [17]

For this case we have the following factorized expression:

$(2y-9) (2y-9)$

Applying distributive property we have:

$(2y) (2y) - (2y) (9) - (9) (2y) + (9) (9) =\\4y ^ 2-18y-18y + 81 =$

We add similar terms taking into account that: Equal signs are added and the same sign is placed.

$4y ^ 2-36y + 81$

ANswer:

$4y ^ 2-36y + 81$

3 0

3 years ago

The measures of the angles of a triangle are shown in the figure below. Solve for x. (7x-12)° 60° O here to search

Andrei [34K]

Answer:

x = 6

Step-by-step explanation:

Based on the triangle sum theorem, the sum of the interior angles of a triangle = 180°

Given the following, right angle (90°), 60°, and (7x - 12)° as interior angles of the triangle, therefore:

7x - 12 + 90 + 60 = 180

Add like terms

7x + 138 = 180

7x + 138 - 138 = 180 - 138 (subtraction property of equality)

7x = 42

7x/7 = 42/7 (division property of equality)

x = 6

4 0

3 years ago

What fraction divided by 3 equals 3/24

podryga [215]

the fraction 8/1 because when dividing fractions you want to flip the second fraction aka 8/1 and multiply the two together.

ex:

3 ÷ 8/1

3/1 × 1/8

answer- 3/24

hope this helps bb ♡

6 0

4 years ago

4x – 4 – 3x > 13 – 7x – 1 + 8

Rashid [163]

If you would like to solve the inequation 4 * x - 4 - 3 * x > 13 - 7 * x - 1 + 8, you can do this using the following steps:

4 * x - 4 - 3 * x > 13 - 7 * x - 1 + 8
4 * x - 3 * x + 7 * x > 4 + 13 - 1 + 8
8 * x > 24 /8
x > 24/8
x > 3

The correct result would be x > 3.

4 0

4 years ago

Computers from a certain manufacturer have a mean lifetime of 62 months, with a standard deviation of 12 months. The distributio

Goryan [66]

Answer:

Between 38 and 86 months.

Step-by-step explanation:

Chebyshev Theorem

The Chebyshev Theorem can also be applied to non-normal distribution. It states that:

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

An in general terms, the percentage of measures within k standard deviations of the mean is given by $100(1 - \frac{1}{k^{2}})$ .

In this question:

Mean of 62, standard deviation of 12.

Between what two lifetimes does Chebyshev's Theorem guarantee that we will find at least approximately 75% of the computers?

Within 2 standard deviations of the mean, so:

62 - 2*12 = 38

62 + 2*12 = 86

Between 38 and 86 months.

6 0

3 years ago