The sum of two unknown numbers is -40. The difference of those same two numbers is 25. What is the product of those two unknown numbers?

243.75

Step-by-step explanation:

Let the numbers be x and y

x+y = -40 …(1)

x-y = 25…(2)

Add (1) and (2) using the elimnation method

2x=-15

x=--15/2 = -7.5

-15/2-y=25

y=-65/2 = -32.5

The product of the two numbers = xy = -7.5*-32.5 = 243.75

.

step-by-step explanation:

30 miles

step-by-step explanation:

we know that 60 seconds equals 1 minute and 60 minutes 1 hour

44 ft       60 sec     60 min     158400   ft

  *   *   =

1 sec       1 min       1 hour         hour

we know that there are 5280 ft per mile

158400   ft       1 mile         30 miles

  *   =

1   hour               5280 ft     1 hour

so in 1 hour   it can travel 30 miles