How to multiply a 2 digit number by 30

Example 20 x 30 is similar to 3x2 which is 6. Just add the zeroes on the end: 600

Put the numbers in a regular multiplication set and multiply by going down each column (first only use the number in the ones place that is on the bottom) then when you do that put a zero in the ones place on your product then do the other number

There is not enough information on this sorry can you take a picture of it and put it on here

X^2 - 4x +(4/2^2) + y^2 + 8y + (8/2^2) = -4 + (4/2^2) + (8/2^2)(x + 2)^2 + (y + 4)^2 = -4 + 4 + 16your center is (-2, -4) and the radius is the sqrt of -4 + 4 + 16 which is 4