We know that:
and:
![8+(-3)[6+(-6a)]=8+(-3)*6+(-3)*(-6a)=8-18+18a](https://tex.z-dn.net/?f=8%2B%28-3%29%5B6%2B%28-6a%29%5D%3D8%2B%28-3%29%2A6%2B%28-3%29%2A%28-6a%29%3D8-18%2B18a)
if you have solve for
then:
and:
if you have solve for
A semicircle has a diameter of 17.6 cm.
1 answer:
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Answer:
x = 4
y = -3
Step-by-step explanation:
We can use substitution, elimination, or graphically.
Step 1: Rearrange first equation
2x + 4y = -4
2x = -4 - 4y
x = -2 - 2y
Step 2: Rewrite systems of equations
x = -2 - 2y
3x + 5y = -3
Step 3: Substitution
3(-2 - 2y) + 5y = -3
-6 - 6y + 5y = -3
-6 - y = -3
-y = 3
y = -3
Step 4: Find <em>x</em> using <em>y</em>
2x + 4(-3) = -4
2x - 12 = -4
2x = 8
x = 4
Graphically:
Use a graphing calc and analyze where the 2 lines intersect.
