X+3y=18 3x+9y=12 determine weather the graphs of each pair of equations are parallel, perpendicular, coinciding, or none of these

a plane descended at a rate of 400 feet per minute. what is the change in the elevation of the plane after 6 minutes.

Veronica is saving money to buy a saddle for her horse that cost $175. She plans to save $10 the first month and then increase the amount she saved by $5 each month after the first month. How many month will it take her to save $175.

What are the dimensions of the cross section formed by a plane intersecting this rectangular prism parallel to its base? The cross section is a The length of the cross section is The width of the cross section is cm. cm. ith = 4 cm

The first class had a kids in it, the second had b kids in it, and the third class had c kids in it. Kids from all three classes were equally divided between two buses. How many kids were on each bus?

the perimeter of a concession stand at the ballpark is 88 meters. the length is 4 meters longer than the width. what is the length and width?

A gram is equivalent to 0.0353 ounces. One ounce is how many grams? Round to the nearest tenth.

What is the final amount if 893 is decreased by 19% followed by a further 17% decrease? Give your answer rounded to 2 DP.

What is 18 to the 27th power?

Reduce the fraction - 20t^5u^2v^3/48t^7u4v

Suppose that 9 is a factor of a number. Which statement must be true?