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2 years ago

Question 1 point

Mathematics

2 answers:

Mamont248 [21]2 years ago

8 0

Answer:

6.25h ≥ 143.75; h ≥ 23; 23 hours

Step-by-step explanation:

Levi earns $6.25 per hour after school. Since he needs at least $143.75 to get a stereo the amount he wants should be equal to or greater than $143.75.

Let h = number of hours worked

The expression can be written as follows:

6.25 × h ≥ 143.75

6.25 h ≥ 143.75

divide both sides by 6.25

h ≥ 143.75/6.25

h ≥ 23 hours

ludmilkaskok [199]2 years ago

4 0

Answer:

h = 23 hours

Step-by-step explanation:

Take 143.75 and divide it by 6.25

143.75/6.25 = 23

23 is the answer

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Maksim231197 [3]

The correct option is: a female who weighs 1500 g

Explanation

Formula for finding the z-score is: $z= \frac{X-\mu}{\sigma}$

Newborn males have weights with a mean $(\mu)$ of 3272.8 g and a standard deviation $(\sigma)$ of 660.2 g.

So, the z-score for the newborn male who weighs 1500 g will be.......

$z(X=1500)=\frac{1500-3272.8}{660.2}=-2.685... \approx -2.69$

According to the normal distribution table, $P(z=-2.69)=0.0036 = 0.36\%$

Now, newborn females have weights with a mean $(\mu)$ of 3037.1 g and a standard deviation $(\sigma)$ of 706.3 g.

So, the z-score for the newborn female who weighs 1500 g will be.......

$z(X=1500)=\frac{1500-3037.1}{706.3}=-2.176... \approx -2.18$

According to the normal distribution table, $P(z=-2.18)=0.0146 = 1.46\%$

As we can see that the probability that a newborn female has weight of 1500 g is greater than newborn male, so a newborn female has the weight of 1500 g that is more extreme relative to the group from which he came.

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2 years ago

7f + g = 5, for f literal equations

DENIUS [597]

Answer:

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Step-by-step explanation:

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Maria earns $5.00 per hour. How much will she earn if she works 7 hours?

stealth61 [152]

Multiply the money * the hours

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Answer:

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Step-by-step explanation:

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120-100= $20 discount

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1 year ago

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