Answer:
add up all the numbers
Step-by-step explanation:
$3017
4x + 8y = 20
- 4x + 2y = -30
find y first
in order to find y eliminate x
add the two equations together
4x+-4x+8y+2y= 20+-30
4x-4x+8y+2y= 20-30
10y= -10
divide both sides by 10 to get y by itself
10y/10= -10/10
y= -1
find x by using the substitution method
- 4x + 2y = -30
-4x+2(-1)=-30
-4x-2= -30
move -2 to the other side
sign changes from -2 to +2
-4x-2+2= -30+2
-4x= -28
divide both sides by -4
-4x/-4= -28/-4
x= 7
answer:
(7,-1)
Answer:
A. 862.4 in^2
Step-by-step explanation:
1) (14x8.9)=124.6
124.6x4(4 sides have the same surface area)=498.4
2) 13x7(half of the 14in)=91
3) Typically, to find the surface area of a right triangle, you would divide the answer by 2, but since we have 8 right triangles, we can just multiply the 91 by 4. 91x4=364
4) 364+498.4=862.4 in^2
Answer: the answer will be that X equals 0 hope this helps
Step-by-step explanation: