Question

Write an inequality for the given statement: The product of 5 and a number is at least –25.

Answer 1

If I said "z is at least -25", how would you write that?

Answer 2

z≤−25 says that z is "less than or equal to" -25, which doesn't make it "at least" -25, does it? It would mean that z is NO BIGGER THAN -25. You want the opposite: z is AT LEAST AS MUCH AS -25....

Answer 3

Remember, "at least -25" means that it could be =-25, or it could be MORE than -25, but it CAN'T BE LESS than -25.

Answer 4

z≥−25 means that z is AT LEAST -25, right?

Do you understand?

Answer 5

just replace the "z" with an expression for "the product of 5 and a number".