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Gemiola [76]
2 years ago
10

PLZ HELP ME AND I WILL MARK BRAINLIEST!!!

Mathematics
2 answers:
iragen [17]2 years ago
7 0
1. 0 + -21.5 = -21.5 2. -20 + -1.5 = 21.5
lesya692 [45]2 years ago
6 0

Answer:

-315 + 100 & -230 + 15

Step-by-step explanation:

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What's faster 240 miles over 4 hours or 330 miles over 6 hours
Sergio [31]
60 miles per hour and 55 miles per hour it will be 240 miles over 4 hours because if you divide 240 by 4 it is 60 miles faster than the other which is 55 miles per hour.
5 0
3 years ago
Read 2 more answers
What is the z-score of a newborn who weighs 4,000 g?.
vagabundo [1.1K]

The z-score of the considered newborn having 4,000 g weight is \dfrac{4000 - \mu}{\sigma}

<h3>How to get the z scores?</h3>

If we've got a normal distribution, then we can convert it to standard normal distribution and its values will give us the z score.

If we have

X \sim N(\mu, \sigma)

(X is following normal distribution with mean \mu and standard deviation  \sigma)

then it can be converted to standard normal distribution as

Z = \dfrac{X - \mu}{\sigma}, \\\\Z \sim N(0,1)

(Know the fact that in continuous distribution, probability of a single point is 0, so we can write

P(Z \leq z) = P(Z < z) )

Also, know that if we look for Z = z in z tables, the p value we get is

P(Z \leq z) = \rm p \: value

For the considered case, the statement in the problem is missing the mean weight of the newborn and standard deviation of the data set of weights of newborn.

Thus, for them, we can consider variables in place of their actual values.

Let we have:

  • X = weights of newborns for some considered system (in grams)
  • \mu = mean weight of newborns (in grams)
  • \sigma = standard deviation of the data set of weights of newborns

Then, the z-score for X = 4000 is

z = \dfrac{x - \mu}{\sigma} = \dfrac{4000 - \mu}{\sigma}

Thus, the z-score of the considered newborn having 4,000 g weight is \dfrac{4000 - \mu}{\sigma}

Learn more about z-scores here:

brainly.com/question/13299273

3 0
2 years ago
5) The graph of the parent linear function f(x) = x is shown in black on the coordinate grid. Write the function that represents
djyliett [7]

Answer:

(m) increased, (b) unchanged.     g(x)

(m) decreased, (b) unchanged.   m(x)

(m) unchanged, (b) increased.      h(x)

(m) unchanged, (b) decreased.    n(x)

f(x): m = -1/2  b = 2

g(x): m = 1/3  b = -3

h(x): m = 2  b = 0

8 0
2 years ago
Which property of real numbers is Illustrated below<br> 12(x +4)=12x +48
tensa zangetsu [6.8K]

Answer:

distributive property

Step-by-step explanation:

In this equation, distributive property is used.

6 0
3 years ago
An earthquake with a magnitude of about 2.0 or
stepan [7]

Answer: 100 times greater

Step-by-step explanation:

6 0
3 years ago
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