A scientist is measuring the temperature change in a chemical

compound. The temperature dropped 11 °F per hour from the

original temperature. After 4 hours, the temperature was

90 °F. Find the compound's original temperature.

two trains leave los angeles simultaneously traveling on the same track in opposite directions at speeds of 50 and 64 mph. How long will it take before they are 285 miles apart.

Write an equation of the line with the given slope, m, and y-intercept (0, b) m=-3/5 b=7/10

Y=2x+3 what type of graph represents the solutions of the equation?

The length of a is 3 times its width if the perimeter is 400ft what is the length and width of the fence

What is the value of the expression? 53/5+7/10-22/3

Jeff is meeting billy at the park to play basketball at 2:30 p. m on the way to the park Jeff took 5 minutes stop and talk to his neighbor then it took him 13 more minutes to get to the park. how long did it take Jeff to get to the park

Based on what you know about rotations, what do you think the mapping rule is for a rotation of 270 degrees clockwise? Explain.

Erica's cell phone bill for July was $82. She sent a check for $50 and then made $37 worth of calls in August. How much did she owe on her cell phone bill?

you spin a spinner that has 8 equal sized sections numbered 1 to 8 find each probability P (perfect squared or odd)

Twenty-three thousand and four hundred six thousand in standard form