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erastovalidia [21]
3 years ago
14

Need help for test asap!

Mathematics
1 answer:
klio [65]3 years ago
3 0

Answer:

do the test then

Step-by-step explanation:

do the test then

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A. 3(x+2)=18
Sergio039 [100]

Answer:

you are distributing

Step-by-step explanation:

how this works is your distributing 3 into both things in () so in this case your are putting 3 into x which gives you 3x and 3 x 2 is 6. Hope this helps!

4 0
3 years ago
Read 2 more answers
The number of cigarettes smoked per day by adults forms a normal distribution. The average number of cigarettes smoked per day i
Mariana [72]

Answer:

17.3 cigarettes represent the 35th percentile

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 20, \sigma = 7

What number of cigarettes would represent the 35th percentile?

This is the value of X when Z has a pvalue of 0.35. So it is X when Z = -0.385.

So

Z = \frac{X - \mu}{\sigma}

-0.385 = \frac{X - 20}{7}

X - 20 = -0.385*7

X = 17.3

17.3 cigarettes represent the 35th percentile

6 0
3 years ago
Melanie cuts a rectangle out of a piece of scrap paper as shown. She wants to calculate the angle measure of the piece that is l
Mumz [18]
If she cuts it then the angle would become a right angle so it sould be 90º
3 0
3 years ago
Read 2 more answers
Which statement explains the relationship of sides BA and B'A' after rectangle BADC has been rotated 90° clockwise about the ori
worty [1.4K]

Answer:

Side B'A has a slope of 1 and is perpendicular to side BA

Step-by-step explanation:

When rotating clockwise 90 degrees x,y will become y,-x so lets apply this to the points.

A=(3,5) -->(5,-3)

B=(1,3)-->(3,-1)

C=(5,-1)-->(-1,-5)

D=(7,1)-->(1,-7)

Now that we have the coordinates for A'B'C'D' we will graph both rectangles, (you can do this using Geogebra you wont need an account)once graphed we can draw a long straight line using a straightedge through points BA and B'A' to see that they eventually intersect and the line through B'A' goes through 1 on the x-axis.

3 0
4 years ago
Read 2 more answers
Mr. Cornapple is the fruit & vegetable buyer for a large school district. In a given week, he has a budget of $6,550. Bushel
Nina [5.8K]

Answer:

40x + 30y ≤ 6,550

Step-by-step explanation:

Given:

Cost of each apple bushels = $40

Cost of each corn bushels = $30

Total budget = $6,550

Find:

Inequality

Computation:

Assume;

Total number of apple bushels = x

Total number of corn bushels = y

So,

40x + 30y ≤ 6,550

6 0
3 years ago
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