Solve system of linear equations by substitution - 2x+9y=15

x+7=4

A golf ball can travel 170 mph this is 10/7 times the fastest speed rerecorded for a hockey puck. what is the record speed for a hockey puck

Divide 59 divided by 2550

A number z plus 2.2 is at least 5. Write this word sentence as inequality

Find the slope of (2,0) (-6,8)

How many solutions does the equation 3x + 6 = - 1 - 3 + 4x have

A square pyramid has a base area of 25 ft2. The pyramid's total surface area is 105 ft2. What is the area of each triangular face?

I have 7 cowry shells. If a dozen eggs (12 eggs) cost 3 cowry shells, how many dozens can I purchase?

Is h (x) = 23 a linear function or no? Explain.

If 12 people walk in a meeting and all of them shake hands how many handsshakes are there

Sarah earns $20 per hour during the week and $30 per hour for overtime on the weekends. One week she earned a total of $650. She worked 5 times as many hours during the week as she did on the weekends. How many hours of overtime did she have?