Answer:
Point Form:
(6,18), (-3,-9)
Equation Form:
x=6, y=18
x=-3, y=-9
Step-by-step explanation:
Solve for the first variable in the first equation, then substitute the result into the other equation.
The value of any number multiplied by 1 stays exactly the same, right? Well, as it turns out, 1 can be written as the fraction 7/7, or the fraction 8/8, or 9/9, 10/10, 11/11... I could go on and on to infinity, but there's a pattern there. 1 simply means "1 whole," or "all of it." "All of it" looks different in different denominators, but the core idea is the same: if we split something into n pieces, "all of it" means we have all n of those pieces. The numerator and denominator will always been the same, no matter how we want to represent 1.
What does this have to do with our problem? Well, we don't want to change the <em>value </em>of our fraction, we just want to change its <em>label</em>. So what we're going to do is multiply it by 1, but we're going to make sure to pick the right <em>label</em> for that 1.
7/12 x 1 = 7/12. This will be true no matter what. Let's see which of these options actually fit the bill:
Can we get this fraction by multiplying 7/12 from some form of 1? Well, 14 = 7 x 2, so let's see what we get if we pick the form 1 = 2/2:
Nope, not quite. 14/28 is <em>not </em>equivalent to 7/12.
What about 21/36? 21 = 7 x 3, so let's give the form 1 = 3/3 a shot:
There we go! All we did there was <em>relabel </em>7/12 by multiplying by form of 1. Since we never changed its value, we can stop our search here and conclude that 21/36 is equivalent to 7/12.
Answer:
(6r+7)+(13+7r)=13r+20
(13-1/2r)-(1-r)=12-1/2r
(-8-r)+(2r-4)=-12+r
Last one is r-13/6
Step-by-step explanation:
Answer:
65°
Step-by-step explanation:
A triangle always will ad up to 180°. Therefore, if you subtract 130° from 180° you'll probably get 50° but that's the closest one to it.
Hope this helps :)
Answer:
x = 2
Step-by-step explanation:
because the pint is at the meddle the 2 sides are equal in length therfore:
29 = 9+10x
29 - 9 = 10x
20
then x = 2