Dan's business loses $9 each day. Which equation would be used to show how much money Dan's business has lost in a week?

-9 × 7
-9 × (-7)
9 × 7
9 × (-7)

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244

Benefit(s) from large economies of scale, in which the costs of goods decrease as output increases. natural monopolles perfect competition

What is the value of x in the equation 1/5x - 2/3y = 30 , when y = 15