What is 1/5(10x-5)-3 in expression standard form

Find the value of the cosine for angle a

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)