<h2>
Greetings!</h2>
Answer:
y =
and x = ![\frac{50}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B50%7D%7B7%7D)
Step-by-step explanation:
To solve simultaneous equations, you need to have the number in front of both x's or y's the same. (signs doesn't matter)
To get -x to -10x we simply need to multiply the first equation by 10:
-x * 10 = -10x
-9y * 10 = -90y
16 * 10 = 160
-10x - 90y = 160
Now we can add the two equations:
-10x + 10x = 0
-90y + 20y = -70y
160 + 20 = 180
-70y = 180
70y = -180
7y = -18
y = ![\frac{-18}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B-18%7D%7B7%7D)
Now plug
into the second equation:
10x + 20(
) = 20
10x -
= 20
Move the
over to the other side, making it a positive:
10x = 20 + ![\frac{360}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B360%7D%7B7%7D)
10x = ![\frac{500}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B500%7D%7B7%7D)
Divide both sides by 10:
x = ![\frac{50}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B50%7D%7B7%7D)
So y =
and x = ![\frac{50}{7}](https://tex.z-dn.net/?f=%5Cfrac%7B50%7D%7B7%7D)
<h2>Hope this helps!</h2>
Answer:
I think it is D
Step-by-step explanation:
256
Just keep muliplying the number
8*2
16*2
32*2
64*2
128*2
Answer:
1176in^2
Step-by-step explanation:
find the surface area of the cube
(14*14)6=1176 inches cubed
14*14 is finding the area of one side and then we multiply it by six because that's how many congruent sides there are
Answer:
a. distribution is uniform
Step-by-step explanation:
Given that a sample of 150 were asked whether or notthey supported capital punishment.
3)
we prepare contingency tab
Expected = 50 50 50
Chisquare = 4
chi square 2 2 0 4
p value 0.135
Since p >0.05 we accept H0
a. distribution is uniform