Evaluate 7x - y if x = 9 and y = 3

the height of a church tower is 15 meters. a man looks at the tower from a distance of 120 meters. what is the angle of elevation of the top of the tower from the man.

Solve for r. -9r = 27

Grace is standing 14 feet from a lighthouse and Kelly is standing 12 feet from Grace. The angle that Grace looks up to see the top of the lighthouse is 45°. The angle that Kelly looks up to see the top of the lighthouse is y°.

A right cylinder has a base area of 169π cm2. Its height is half the radius. Identify the lateral area and the surface area of the cylinder.

Logan bought 28 balloons. Six-sevenths of the balloons are purple. How many of the balloons are purple?

A Car costs $9,998 and you need to rent it. How much will you pay per month if you have to pay for a 5 year loan?

A group of friends are ordering food. The total amount that they can spend on their food bill is $41, including the delivery charge of $6. The equation below represents the situation, where x is the cost of each friend's meal.

Farmer brown came to town with some watermelons. He sold half of them plus half a melon, and found that he had did whole melons left. How many melons did he take to town?

The density of apple juice is 1.04 grams per cm3. The density of fruit syrup is 1.6 grams per cms The density of sparkling water is 0.99 grams per cm3.

Is 40cm and 80cm a trangle