Witch ones are mathematical sentences?

5g=9

4x

8r=12

R+7=4

34

X=1

A recipe calls for 1 cup of sugar and 5 cups of water. How much sugar is used per cup of water?

Solve "cos 3x = - 1" algebraically given the domain [0,2pi)

Expression below? (14x - 7) + (10 - 2x)

3. Jacob and Sarah are saving money to go on a trip. They need at least $1975 in order to go. Jacob mows lawns and Sarah walks dogs to raise money. Jacob charges $25 each time he mows a lawn and Sarah charges $15 each time she walks a dog.

Jeff subscribed to cable for 75.00 a month and 140.00 installation andrew has another cable co. For 20.00 installation and 90.00 a month. In how many months will we be paying the same amount for their service.? And what will be the amount they pay?

Write an equation in slope-intercept form of the line that passes through (6, - 2) and (12,1)

How are models and number line alike

sheila went to court 12 times a month for the first year. for the next 10 years she went to court twice a month. for the last year she went to court three times a month. how many times didnshe go to court in all in the twelve years

A second number is 5 less than a first number. a third number is three times the first number. if the sum of the three numbers is 555, find the numbers. (a) 110 / 105 / 330 (b) 105 / 100 / 315 (c) 125 / 120 / 375 (d) 112 / 107 / 336

the combined enrollment in the three grades at Jefferson Middle School is 977. there are 356 students in the 7th grade 365 in the 8th grade write and solve an equation to find how many students are in the ninth grade find an equation and a solution