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3 years ago

I need help on this

Mathematics

2 answers:

Genrish500 [490]3 years ago

8 0

The answer is C. 16 since its the only number thats, when plugged into both, is equal, This is the case as parallel lines AWAYS have the same angle measurement in these specific spots. The picture will have my work, and I have added a 1 to the angles that equal 50° and a 2 to the angles that equal 130°(since the transversal is a straight line, its a 180° angle, so on BOTH sides of the transversal, the 2 angles must equal 180° when added).

luda_lava [24]3 years ago

7 0

Answer:

C. 16

Step-by-step explanation:

First of all, these two angles are corresponding angles, which means that they equal each other. So, the equation here would be: 2x+18= 4x-14.

Step 1- Move the variables to one side.

2x+18= 4x-14

-2x -2x

18= 2x-14

Step 2- Add 14 to both sides of the equation.

18= 2x-14

+14 +14

32= 2x

Step 3- Divide 2 to both sides of the equation to isolate the variable.

2 2

x= 16

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Please help...................

anastassius [24]

Answer:

I would help you

Step-by-step explanation:

But I'm really lazy and I really don't like math. I'm not good at it and I think I failed it last semester. true story bro.

7 0

3 years ago

Read 2 more answers

Dvds are for $24 each,felipe write the expression 4 times 24 to find the costin dollars of buying 4 dvds, how can i rewrite feli

Karo-lina-s [1.5K]

The distributive property states that:

a(b+c)=ab+bc.

or more generally: a(b+c+d)=ab+av+ad.

This is a very useful tool to perform multiplication.

For example, if we want to multiply 7 by 234, we can proceed as follows:

7*234=7(200+30+4)=7*200+7*30+7*4=1400+210+28=1610+28=1638

back to our problem,

4 * 24 = 4(20+4)=4*20+4*4=80+16=96 ($)

So, instead of multiplying 4 by 24, we multiplied 4 by 20 and 4, which is easier, and then added these together.

Answer:

4 * 24 = 4(20+4) [=4*20+4*4=80+16=96 ($)]

5 0

2 years ago

The question that follows this graph is:

azamat

Answer:

S'(5,-1), M'(1,-3)

Step-by-step explanation:

So, if the rotation is clockwise, the formula is (x,y)--->(-x,-y).

The original points are, (-1,3) and (-5,1).

Using the formula,

(-1,3) ----> (1,-3)

(-5,1) ----> (5,-1)

For the question in the image, the reflection over the x-axis is..

S'(-5,1) ---> (-5,-1)

M'(1,-3) ---> (-1,-3)

6 0

3 years ago

In a sample of 1000 cases, the mean of a certain test is 14 and the standard deviation is 2.5. Assume the distribution to be nor

Maslowich

Answer:

The top 20% of the students will score at least 2.1 points above the mean.

Step-by-step explanation:

When the distribution is normal, we use 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.

The mean of a certain test is 14 and the standard deviation is 2.5.

This means that $\mu = 14, \sigma = 2.5$