Sam drives to work. When she averages 20mph it takes 40 minutes. Sam needs yo get to work in 30 minutes. What is the minimum average speed she requires?

The rectangular bird sanctuary with one side along a straight river is to be constructed so that it contains 8 km2 of area. Find the dimen - sions of the rectangle to minimize the amount of fence necessary to enclose the remaining three sides.

Find two positive numbers satisfying the given requirements. the product is 156 and the sum is a minimum.

Which expression is equivalent to 16^3? a. 2^7 b. 2^11 c. 2^12 d. 2^64

What is the value of u+v+w when u = - 10, v = 4, and w = 8? a. - 22 b. 2 c. 14 d. 22

What is 378 times by 9

If 12 counters are three-fourths of a set of counters, draw a full set of these counters.

What is the answer to 7+6 / (-7+9) ^2

What is the greatest possible error for a measurement of 25 gallons

Maya uses blue and orange fabric to make identical wall decorations. The graph below shows the relationship between the amounts of blue and orange fabric used. (0.7, 0,3). What is the constant of proportionality? A:3/10, B:2/5, C: 3/7, D:1/2.

To be considered similar similar, two polygons must have corresponding side that are what?