13x + 5x = 3 Confused

Is (1,2) a solution to y=x+1

Identify the x-intercept and the y-intercept using the equation 14x-6y=42

Stella invested $42,000 in an account paying an interest rate of 4 7/8% compounded quarterly. Chloe invested $42,000 in an account paying an interest rate of 4 1/2% compounded annually.

Round 0.743 to the nearest hundredth

A x 10^5 + 2a x 10^4 = 7200000 and a x 10^5 - a x 10^4 = 5400000 Find the value of a

On October 17, 2006 in an article called US Population Reaches 300 million, the BBC reported that the US gains 1 person every 11 seconds. If f (t) is the US population in millions t years after October 17, 2006, find f (0) and f' (0).

A number cube with the numbers 1 through 6 is rolled. What is the theoretical probability of rolling an even number?

Nell's mom makes chocolate milk with 30 ML of chocolate syrup for every 2 ounces of milk. Nell's dad adds 65 ML of chocolate syrup for every 5 ounces of milk.

Mary is 63.5 inches tall and her sister Tonya is 70 inches tall. Tonya wants to know how many inches taller she is than Mary. Which equation and solution can be used to solve this problem?

A school received a shipment of 4 boxes of paper. The school wants to split the paper equally among its 3 printers. How much paper should go to each printer?