I can't seem to figure this out: S = n/2 (a+L). Find a ...

What is 4/7 of 21 in mathematics?

On the graph of the equation 3x + 2y = 18, what is the value of the y-intercept? -9 -6 6 9

Mary has 10 yards of string. she uses 2 yards of string for a project. she wants to cut the remaining string into pieces that are 1⁄3 yard long. how many pieces can she cut from the remaining string?

A number K is decreased by eight, and the result is multiplied by eight. This product is then divided by two. What is the final result?

What is the 30 term of this sequence: -5,-2,1,4,7

Harriet plans to file using Single federal income tax return with her husband. Together, they made $145,000 last year. They also received $500 in interest from a CD they own together. They have no children.

Two identical rubber balls are dropped from different heights. Ball 1 is dropped from a height of 148 ft, and ball 2 is dropped from a height of 203 feet.

If 4+6+7=242854 6+6+7=364217 6+7+8=424828then 7+5+8=?

the numbers 30 to 74 are in a hat. If the probability of drawing a multiple of 2 is 23/45. What is the probability of not drawing a multiple of two?

What is the value of p? p+1/5-1/2=1/10