In a school experiment the temperature of a substance is changed from 42 degrees F to - 54 degrees F at an average rate of 12 degrees per hour. Over how many hours does the change take place?

Given the perimeter of a rectangle and either the length or width, find the unknown measurement using the appropriate formula. The perimeter is 76 cm and the length is 20 cm. What is the width of the rectangle? Show all your work

What is 8/9+5/6-3/4 in a irreducible fraction form

A hexagon has a radius measuring 23 cm. What is the approximate area of the hexagon? 686.6 square cm 793.5 square cm 1374.4 square cm 1587.0 square cm

What's the x intersect of the equation 4 - 8x = - 1 + 1 - 9x + 8

First to answer is brainliest: Diego is going to design a kite. Two of the opposite angles are congruent. One of the other angles is half the congruent angles, and the other is twice the congruent angles. Create and solve and equation.

Find the discriminant of x^2+4x-32=0

Jamil has 3 pet lizards. The pet store owner said that Jamil will need to buy a total of 36 crickets to feed his lizards. If each lizard eats the same number of crickets, how many crickets does each lizard eat?

Fatima wants to purchase a scarf for $45 and a sweater for $77.50 if she currently has $100 how much more money does she need to purchase the two items

The perimeter of a rectangle is 48 inches. If the width of the rectangle is 8 inches, what is the length?

Y=5-2x what is y equals five minus two x