Solve the system by substitution. 5x+2y= 5 y=-2x + 3

1 answer:

3 0

5x+2(-2x+3)=5
5x-4x+6=5
x=-1

Then plug back into either to solve for y.

y=-2(-1)+3
y=2+3
y=5

Substitution means you just replace one variable with the other equation so only one variable is showing. That’s how you solve for the first variable.

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Read 2 more answers

Suppose the radius of a circle is three units what is the circumference

SpyIntel [72]

Answer:

$6\pi$ or $18.84$ units

Step-by-step explanation:

The circumference of a circle can be found using the formula $C=2\pi r$ , where $C$ is the circle's circumference and $r$ is the circle's radius. We know that $r=3$ and that we are solving for $C$ . Therefore: