Solve using the quadratic formula x2 - 6x - 40=0

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x = 10 or x = -4

x = 4 or x = -10

x = -7 or x = 7

x = -4 - √7 or x = -4 + √7

For the following geometric sequence, find the recursive formula. {-80, 20, -5, } i need : ')

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

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.