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3 years ago

7

On a science exam, Jackson scored 85 out of 100 possible points. There were 20 questions on the exam. Each question was worth th

e same number of points. How many questions did Jackson answer correctly on the science exam?

1 answer:

d1i1m1o1n [39]3 years ago

4 0

Do 85÷20 and then add it to 100

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|x−y+z|, if x=3; y=−2; z=−6

Finger [1]

Answer:

1

Step-by-step explanation:

Try the question without the absolute value brackets first.

Then it would be 3+2-6

Since it states "x-y" and y is -2, then it would be 3+2 since a negative times a negative becomes a positive

Same thing for "z", instead of +6 it would be -6 because a negative times a positive is still a negative

Now, 3+2-6 is -1 but MAKE SURE to put the absolute value brackets back. Making the answer a positive number. Therefore, it would be 1

3 0

2 years ago

Can someone please help me on this one.

zvonat [6]

The answer is choice C

The angles GQI and IQM combine to form the straight angle GQM which is 180 degrees. This angle is essentially a straight line. It is the line GM.

5 0

3 years ago

The number of text messsages that teenagers send per month is normally

ki77a [65]

Answer:

$z=\frac{4415-3400}{450}=2.26$

And the explanation of this number is:"The number of text messages for Kendra it's 2.26 deviations above the mean"

Step-by-step explanation:

1) Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

2) Calculate the z score

Let X the random variable that represent the number of text messages per month, and for this case we know the distribution for X is given by:

$X \sim N(3400,450)$

Where $\mu=3400$ and $\sigma=450$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$z=\frac{4415-3400}{450}=2.26$

And the explanation of this number is:"The number of text messages for Kendra it's 2.26 deviations above the mean"

6 0

3 years ago

How how is 1/2 + 1/4 solve differently than 1/2 + 1/3?

yulyashka [42]

1/2 + 1/4 =
2/4 + 1/4 =
3/4 <===

7 0

2 years ago

Read 2 more answers

Which function is increasingnon the interval (negative infinity, positive infinity)

BlackZzzverrR [31]

Answer:

h(x) = 2^(x) - 1.

Step-by-step explanation:

Let's look at each equation:

f(x) = -3x +7, Well as x increases, since it's multiplication, there are "going to be more" -3's, so it's going to be decreasing.

g(x) = -4(2^x). While 2^x is increasing, because "there are going to be more 2's multiplied by each other" as x increases, it's being multiplied by a negative number, so it's actually going to be decrasing

h(x) = 2^(x) - 1. Here's it's going to be increases as x goes towards infinity because "there are going to be more 2's multiplied by each other", and there isn't any negative sign, while there is a negative 1, it's constant, so the overall value will be increasing

3 0

1 year ago