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3 years ago

What is the value of -42 +(5-2)(-3)?

Mathematics

1 answer:

SpyIntel [72]3 years ago

6 0

Answer:

=-42+3-3

=-42-3+3

=-45+3

=-42

Step-by-step explanation:

this is the correct answer

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A sleep time of 15.9 hours per day for a newborn baby is at the 10h percentile of the distribution of sleep times for all newbor

Step2247 [10]

The mean time in hours per day for newborn babies is 16.5 hours ⇒ D

Step-by-step explanation:

A sleep time of 15.9 hours per day for a newborn baby is at the 10th

percentile of the distribution of sleep times for all newborn babies

Assuming the distribution is normal with a standard deviation of

0.5 hour

To find the mean time let us do that

1. Use the normal distribution table to find the corresponding z-score

for 10th percentile

2. Use the rule μ = x - zσ, where μ is the mean, σ is the standard

deviation and x is the score

3. Substitute the values of x, σ and z in the rule to find μ

Look to the normal distribution table to find z-score that equivalent

to the area = 10/100 = 0.1 (10th percentile)

∵ z-score = -1.28

∵ σ = 0.5 hour

∵ x = 15.9

∵ μ = x - zσ

- Substitute the values in the rule

∴ μ = 15.9 - (-1.28)(0.5)

∴ μ = 15.9 + 0.64

∴ μ = 16.54 ≅ 16.5 hours

The mean time in hours per day for newborn babies is 16.5 hours

Learn more:

You can learn more about the normal distribution curve in brainly.com/question/8799684

#LearnwithBrainly

6 0

2 years ago

What fraction of an hour is 15 minutes? Give your answer in its simplest form.

Salsk061 [2.6K]

Answer:

1/4

Step-by-step explanation:

15/60 = 1/4

8 0

2 years ago

Read 2 more answers

Simplify. 8(12 - p) 20 - (8+p) 96 - 8p 96 - p 96p

Romashka [77]

So the right answer is of option C

Look at the attached picture

Hope it will help u ..

6 0

2 years ago

What is the image of the point (3,2)(3,2) after a rotation of 90^{\circ}90 ∘ counterclockwise about the origin?

BARSIC [14]

Answer: = (-2,3)

Step-by-step explanation:

Rotation is a transformation of a figure by rotating it for a specific angle about a fixed point.

Here, fixed point = origin = (0,0)

Transformation rule for rotation of $90^{\circ}$ counterclockwise about the origin:

$(x,y)\to (-y,x)$

Then, the image of the point (3,2) = (-2,3)

Hence, the image of the point (3,2) after a rotation of $90^{\circ}$ counterclockwise about the origin = (-2,3)

4 0

3 years ago

I need help 8 1/4 x 4 1/2 x 6 1/2

Vesnalui [34]

Answer:

$241\frac{5}{16}$

Step-by-step explanation:

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2 years ago