How many solutions does this equation have and how do you know?

{3x+y=2

{4y=12-12x

What is 98% as a fraction in its simplest form

There are 156 students at summer camp. The camp has 13 cabins. An equal number of students sleep in each cabin. How many students sleep in each cabin

Five more than the product of 14 and a number in algebraic expression

Six times a number is 45 greater than the product of the number and - 3.

The average monthly rent for a one bedroom apartment in NYC was $2,800 in 2013. A random sample of 16 apartments in NYC showed that the average rent is $2,850 with standard deviation of $50. Assume normal distribution.

Which of the following expressions is equivalent to - 9? A. 63 : 7 B. - 63 : 7 C. - 7 : 63 D. - 63 : (-7)

What is 7 2/15 + 5 2/3 + 9 13/15

Susan has $4.00 between nickels and quarters. In total she has 20 coins. How many of each coin dues susan have?

The trunk of a tree is 50 cm thick. Each year it gets thicker by 1 cm. How thick will the tree trunk be in 50 years?

Two angles form a linear pair. One angle measures 8 less than three times the other. Find the measures of the angles.