<span>3(7x+ 1) = 21
21x + 3 = 21
21x = 18
x = 6/7
hope this helps!</span>
Answer:

Step-by-step explanation:
Distance Formula: 
Simply plug in your 2 coordinates into the distance formula to find distance <em>d</em>:






The answer is f(x)=x²+2x when evaluated with -3 gives you the value of 3
If we use similar triangles ( as shown in the attachment ) we will see that the line CM is also 1/4 *( yC-yD)= 1/4*(2+2) = 1/4*4 =1
Answer: y-value of that point is A)
y=1.
2x+6 = 20
take 6 from both sides
2x = 14
divide by 2 on both sides
x = 7