Simplify 2x + 5x + 4x

The average speed of a high-speed train in Japan in 162 miles per hour. At this rate how many miles would the high-speed train travel in 45 minutes. A. 40.5 miles B. 72.9 miles C. 81.0 miles D. 121.5 miles

What multiplys to be 12 but adds to be 7

Find the domain of the relation { (-4, - 1), (-2, 1), (0, 1), (2, 3), (4, 0) } answers: A:{-1, 0, 1, 3} B:{-4, 0, 2, 4} C:{-4, - 2, 0, 2, 4} D:{-4, - 2, - 1, 0, 1, 2, 3, 4}

The rockets scored 15 baskets out of 21 attempts. How many attempts will it take for the rockets to score 40 baskets?

pierre traveled down a canal by barge from the town of portage (elevations 726 feet) to the town of barrage (elevation 626 feet). on the way, he had to pass through a series of locks.

Are the expressions below equivalent 3 (4x+8) 12x+24

How many solutions are there to the following system of equations? 4x-14y=6 -2x+7y=-3 0 1 2 infinitely many

Can someone tell me how to work out this problems and ones similar to it? Jack has $16 in a savings account. The interest rate is 5% per year and is not compounded. How much will he have in 1 year?

How would you find the area of a chair?

Answer the questions about the following sets: D = x; C = x is a person allergic to cats; P = x is a person allergic to pollen How many people are not allergic to any of the three choices? How many people are allergic to all three choices?