Answer:
(2x - 5)(2x +5)
Step-by-step explanation:
4x^2 is a perfect square with a square root of 2x, and 25 is also a perfect square with a square root of 5. The difference of two perfect squares a and b can be written as 
. So, 4x^2 - 25 can be factored into (2x-5)(2x+5).
Hope that helped! ;)
1) Draw the triangles JKL and J'K'L' in a same coordinate system.
When I did that, I realize the if you translate the triangle JKL 1 unit left and then you reflects the image across the x-axys you get the you get the triangle J'K'L'.
So, select the boxes in that same order:
1) translation 1 unit left
2) reflection across the x - axis.
2) The answer ot the second question is line r.
That is called the line of reflection because if you reflect the figures through it you will have the same figure.
Answer:
1 hundred and 3 tens
Step-by-step explanation:
I assume you mean 130 as hundreds and tens and the answer to that would be 1 hundred and 3 tens.
Answer:
Step-by-step explanation:
- The Z-score allows you to decide if your sample is different from the population mean. In order to use z, you must know four things:
- The population mean.
- The population standard deviation.
- The sample mean.
- The sample size.
- Usually in stats, you don’t know anything about a population, so instead of a Z score you use a T-Test with a T Statistic.
- The major difference between using a Z score and a T statistic is that you have to estimate the population standard deviation. The T test is also used if you have a small sample size (less than 30).
Answer:
x= -10
Step-by-step explanation:
So because the angle 55 is part of the same line as one of the unknown angles you can do 180-55 to find that first angle at the top, which is 125.
Next add all three angles (125 + x + 35 + x + 40)=180
Combine the x values to get 2x and subtract the three values from 180
Then 2x= -20, x should be equal to -10
You can plug x back into the values and check your work by adding all the values again, making it all equal to 180 degrees again
