Fine the area of a circle with a radius of 7 in. write the formula, substitute, solve.

Formula: A=(pi)r^2

Substitution: A=3.14(7^2)

                     A=3.14(49)

Solve: A=153.86 in^2

*I personally like to use the pi sign on my calculator to multiply the radius squared by, but my keyboard did not have a pi sign.  Usually, the pi sign is more exact.  If you used the pi sign, your answer would be 153.94 inches^2.  Hope this helps!

arrange the equations with like terms in columns.

analyze the coefficients of x or y.

add the equations and solve for the remaining variable.

substitute the value into either equation and solve.

check the solution.

step-by-step explanation:

the length of o'p' is .

step-by-step explanation:

it is given that the quadrilateral m'n'o'p' is the image of quadrilateral mnop after dilation.

the center of dilation is origin and the scale factor is 1.5.

in dilation the image and preimge are similar figures. it means the sides of image and preimage are proportional.

the scale factor is defined as

the scale factor is 1.5.

multiply both sides by op.

note: if the value of op is given, then multiply the value of op with 1.5 to get the length of side o'p'.

therefore length of o'p' is .