Why Aren’t the expressions 5+5+5+ X plus X plus X plus X equivalent

1 answer:

6 0

I don’t know what you mean. Are you talking about the fact that x is an unknown number or the fact that there are 4 “terms” in one and 3 in the other?

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I have to find the length of the angle indicated for the trapezoid

Stels [109]

That is not a trapezoid, it is a general quadrilateral. All 2-dimensional, 4-sided figures have an internal angle sum of 360 (triangles are 180). So if you assume angles P and Q are right, they are each equal to 90 degrees, for a total of 180.
Subtract: 360 - 180 = 180. We know that S + R must equal 180. If you subtract 180 - 65, you get 115, which is obtuse (greater than 90 degrees). This matches the drawing as the unknown angle is clearly greater than 90. So the answer is 115 degrees.

6 0

3 years ago

Check my Work: Factoring for 2y^+9y-18 is (2y-3) (y+6) true or false?

Alexxandr [17]

It is true because when you separate 2y^2 +9y -18, you are supposed to get the factors (2y-3)(y+6), when you multiply this it gives you the first equation, we know this because when we multiply the first term it gives us exactly 2y^2 and if we multiply the last ones it gives you -18, now here is the tricky part, when we multiply the middle part we get 12y and -3y, when we add these up we get 9y, now is that the same middle as in the equation? Yes… then our factors are correct making this true

Hope this helps

7 0

3 years ago

What is the square root of 25? =7

nataly862011 [7]

Square root of 25 is 5

4 0

3 years ago

Read 2 more answers

Assuming a normal distribution, families spends an average of $500 on their monthly cell phone bills with a standard deviation o

lara [203]

The probability is 0.69.

We find the z-scores that correspond with each end of the range we're looking for. To find a z-score, we use the formula:
$z=\frac{X-\mu}{\sigma}
\\
\\=\frac{350-500}{75}=\frac{-150}{75}=-2$

$z=\frac{400-500}{75}=\frac{-100}{75}=-1.33$

Using a z-table (http://www.z-table.com) we see that the area under the curve left of the score 350 would be 0.228. The area under the curve left of the score 400 would be 0.918. To find just the range between 350 and 400, we subtract the area left of 350 from the area left of 400; this will give us just from 350 to 400:

0.918-0.228 = 0.69.

8 0

3 years ago

Can someone help me really quick?<br> Which is the graph of y = ⌊x⌋ – 2?

Alex787 [66]

Answer:

the 3rd one

Step-by-step explanation:

6 0

3 years ago