Find the number of real-number solutions of the equation below.
x2+7x−5=0

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?