Amerchant has coffee $20 a pound that she wishes to mix with 70 pounds of coffee worth $50 a pound to get a mixture that can be sold for $30 a pound. how many pounds of $20 coffee should be used ? a) 70 pounds b) 210 poundsc) 105 pounds d) 140 pounds

in 4 days he will run   12/14

step-by-step explanation:

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)