David keeps records of his monthly earnings. last month he worked 120 hours and earned $2700. this month he worked 100 hours and earned $2300. which equation could you use to find f(x), the amount he would earn at this rate if he worked x hours?
f(x)=120x+400
f(x)=400x
f(x)=100x+300
f(x)=20x+300
and tell me why it's the . ^-^"

The sum of two numbers is 58. the first number is 8 less than half the second number. let  c  represent the first number. let  drepresent the second number. which statements about solving for the two numbers are true? check all that apply.the equation    represents the sum of the two numbers.the equation    represents the sentence “the first number is 8 less than half the second number.”the equation    represents the relationship between the two numbers.the equation    represents the sum of the two numbers.the number  d  is 14.the number  c  is 44.the number  c  is 14.the number  d  is 44.

If 24 people have the flu out of 360 people, how many would have the flu out of 900. choose many ways you could use proportion that david would use to solve this problem

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )