28 a toy is made
rings stacked on a base, as shown in the diagram. the
ameter of ring 1 is 87% of the diameter of the base. for ring 2 through ring
her of each ring is 87% of the diameter of the ring directly below it.
base
the diameter of the base is 5 inches. which function can be used to find the diameter in
inches of ring r, where 1 f
d(r) = 5(0.87)

Simplify the expression. -2/5(10+15m-20n)

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.