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3 years ago

(D) Work out 1/4 of 28

Mathematics

2 answers:

galben [10]3 years ago

8 0

Answer:

Step-by-step explanation:

$\left(\frac{1}{4}\right)\cdot28$

$\frac{\left(1\right)\cdot\left(28\right)}{\left(4\right)\cdot\left(1\right)}$

$\frac{\left(28\right)}{\left(4\right)}$

You should divide both the numerator and the denominator by 4 and get 7 as a result of that.

MAXImum [283]3 years ago

7 0

Answer:

1/4 ×28=7 ::*^ jghjnryh

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In a recent study on world happiness, participants were asked to evaluate their current lives on a scale from 0 to 10, where 0

uysha [10]

Answer:

a) A response of 8.9 represents the 92nd percentile.

b) A response of 6.6 represents the 62nd percentile.

c) A response of 4.4 represents the first quartile.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 5.9

Standard Deviation, σ = 2.2

We assume that the distribution of response is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

a) We have to find the value of x such that the probability is 0.92

P(X < x)

$P( X < x) = P( z < \displaystyle\frac{x - 5.9}{2.2})=0.92$

Calculation the value from standard normal z table, we have,

$P(z$

$\displaystyle\frac{x - 5.9}{2.2} = 1.405\\x = 8.991 \approx 8.9$

A response of 8.9 represents the 92nd percentile.

b) We have to find the value of x such that the probability is 0.62

P(X < x)

$P( X < x) = P( z < \displaystyle\frac{x - 5.9}{2.2})=0.62$

Calculation the value from standard normal z table, we have,

$P(z$

$\displaystyle\frac{x - 5.9}{2.2} = 0.305\\x = 6.571 \approx 6.6$

A response of 6.6 represents the 62nd percentile.

c) We have to find the value of x such that the probability is 0.25

P(X < x)

$P( X < x) = P( z < \displaystyle\frac{x - 5.9}{2.2})=0.25$

Calculation the value from standard normal z table, we have,

$P(z$

$\displaystyle\frac{x - 5.9}{2.2} = -0.674\\x = 4.4172 \approx 4.4$

A response of 4.4 represents the first quartile.

4 0

3 years ago

23 ones x 2 tens= answer

shutvik [7]

23 and 2 tens is 23 and 20 which equals 53

53

5 0

3 years ago

The factors of 5y^2-2y-7 are (5y-7) and ???

gladu [14]

If we expand bx to jx and kx we have:

5y^2-2y-7

5y^2-7y+5y-7 then factor...

y(5y-7)+1(5y-7)

(y+1)(5y-7)

So the other factor is:

(y+1)

4 0

3 years ago

Please help me, im desperate

Arada [10]

Answer: C. “BEC”

Step-by-step explanation:

5 0

2 years ago

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Bond [772]

Answer is X > 18

1. Group all constants on the right side of the inequality
X/3 - 2 > 4
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2 years ago