I won't answer them all for you (don't want to cheat - need to learn something).
But for the first one given:
<span>-2x-9y=-25
-4x-9y=-23
you set up either x or y (which ever one you want to eliminate) so that one of them cancels.
So this one is easy - you just have to multiply an entire row by negative (doesn't matter which one) - so that the y's will be + and -
Since they're both 9 and they're subracting NOW - you can eliminate the y value. Now add/subtract the x's. So it'd be -2 or 2 depending on how you eliminated y. Then add the number outside of the = sign. Now just solve for x. After that plug in whatever you got for x into both of the rows. Then find the y value.
Hopefully this wasn't confusing -- reply if it is and I will try to simplify. I can give you contact if you need help with the rest
Good luck!</span>
Answer:
1. <
2. <
Step-by-step explanation:
Have a good day :)
Answer:
The measure of <TRU is 72 deg.
Step-by-step explanation:
<QRU is a right angle, so it measures 90 deg.
Since m<QRT = 18 deg, then m<TRU must be 72 deg since 72 + 18 = 90.
Answer: The measure of <TRU is 72 deg.
A>2.8
start at 2.8 on the number line, using the last symbol move it to the right
----------->
1. 1/2
2.2/3
3. 1
4. 1/3
5. 2/7
6. 1/4
7. 4/3
8. 3/2
<h3>How to evaluate the value</h3>
To find 2x of the vale of x, we have to multiply the value of 'x' by 2
1. x = 1/4
⇒ 
⇒
2. x = 1/3
⇒
3. x = 1/2
⇒ 
⇒ 
4. x= 1/6
⇒ 
⇒ 
5. x = 1/ 7
⇒ 
6. x = 1/8
⇒ 
⇒ 
7. x = 2/3
⇒ 
8. x = 3/4
⇒ 
⇒ 
Learn more about algebraic expressions here:
brainly.com/question/723406
#SPJ1
