Graph systems of linear equations?

X+y=-3

5x-y=-3

A preacher would like to establish that of people who pray, less than 80% pray for world peace. In random sample of 110 persons, 77 of them said that when they pray, they pray for world peace. Test at 10% level of significance.

James wants to tile his floor while using tiles in the shape of a trapezoid. To make the pattern a little more interesting he has decided to cut the tiles in half along the median.

Today, gasoline prices are $3.44 per gallon. One year ago, gasoline prices were $3.75 per gallon. Determine the percent of change in the gasoline price from a year ago to today.

Write the word sentence as an inequality. Four times a number X is at most - 32

The ratio of green marbles to total marbles in a bag is 2:9. The ratio of red marbles to total marbles in the same bag is 1:3. Which of the following statements is true? There are more green marbles in the bag.

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.