Twice the difference of a number and 9 is 5

Use the variable c for the unknown number.

Find the equation of the line passing through (-7,-9) and perpendicular to 8x-9y + 2=0

Donald has x twenty-dollar bills and 1 ten-dollar bill. How much money does Donald have?

Enter the next three terms in the geometric sequence. Round to the nearest tenth value. 36, 54, 81, 121.5, ...

If a and b are the measures of two first quadrant angles and sin a = 4/9 and sin b = 2/5 find sin (a+b)

What is the radius of 30

Brianna jogs 6 laps around a track each morning. The track is 1/4 mile around how many yards does Brianna jog each morning?

Jordan and Roman travel the same route to work. Jordan leaves for work one morning and drives at a rate, r, of 56 mph. Roman leaves the house soon after, when Jordan has already traveled 2 mi. Roman drives at a rate of 60 mph.

Evaluate. XSS Submit

Least to greatest 3/4, 0.7, 1/2, 0.1

Simplify the polynomial (-8*) + * + (-2)