Multiply, then you get 2a - 10 = -2. Then isolate the variable by adding 10 on both sides. you get 2a = 8. divide both by 2 and you get a = 4
1) find the lcd the lcd is 12
2)rewrite the fractions 1/4 and 2/3 using 12 as the denominator (second column) you get 3/12 and 8/12
3) since its confusing to subtract 8/12 from 3/12 you need to borrow one form the 126 doing so is the same as taking 12/12 from 126 this change to 125 and the 12/12 adds to the 3/12 making it 15/12
4) subtract 8/12 form 15/12 to get 7/12
5) subtract 78 form 125 to get 47
6) the answer is 47 7/12
8.5-2.2=6.3/2=3.15/2=1.575+2.2=3.775 which is your answer, 3.775
Answer:
49n^2-70n+25
Step-by-step explanation:
(7n-5)(7n-5)
FOIL it: 49n^2-35n-35n+25
combine like terms: 49n^2-70n+25
In each graph, they give you a line.
For part A, they want you to use the <u>Distance Formula</u> which is:
![\sqrt{(x2 - x1)^{2}+(y2 - y1)^{2}}](https://tex.z-dn.net/?f=%5Csqrt%7B%28x2%20-%20x1%29%5E%7B2%7D%2B%28y2%20-%20y1%29%5E%7B2%7D%7D)
(x2 is supposed to be x sub 2, but I can't put subheadings in the equation tool)
x1, x2, y1, and y2 are the coordinates of the endpoints of the segment.
For part B, they want you to use the <u>Midpoint Formula</u>, which is:
![(\frac{x1 + x2}{2}, \frac{y1 + y2}{2})](https://tex.z-dn.net/?f=%28%5Cfrac%7Bx1%20%2B%20x2%7D%7B2%7D%2C%20%5Cfrac%7By1%20%2B%20y2%7D%7B2%7D%29)
The coordinate pair you get from the Midpoint Formula is your midpoint.
Hope this helps! :)