In which step did leticia make her first mistake

four red boxes and two black boxes cost $40. Five red boxes cost $20. All red boxes cost the same. All black boxes cost the same. What is the ratio of the cost of a red box to the cost of a black box.

You have four bills that need to be paid this week. The electric bill is $182.17, the water bill is $92.55, the cell phone bill is $225.82, and the cable bill is $127.94.

If (x + yi) + 6=2, what is x+yi?

Benito has 6 dollars to spend. A sundae cost 3.25 plus 0.65 per topping. How many toppings can he order

From 12 teachers to 48 percent increase or decrease

Simplify [2 (cos 210 + i sin 210) ]^2

An online store is offering 15% off all items in your order. Before the discount is applied, the items in your cart are: shampoo for $6.35, conditioner for $6.35, granola bars for $12.50, dish soap for $13.40, and toothpaste for $2.50.

Classify the type of this chemical reaction: 2H2 (g) + O2 (g) → 2H2O (g) A) combustion B) decomposition C) neutralization D) synthesis

a cruise ship has a large, circular window. It has a diameter of 6 meters. What is the windows area?

Suppose y varies directly with x write a direct variation equation that relates x and y when y = 6 and x=12 then find the value of y and x=10