David is twice as old as Mark. Nine years ago, David was three times as old as Mark was then. How old is David in years? Thanks!

David is twice as old as Mark. Nine years ago, David was three times as old as Mark was then. How old is David in years? Thanks!

Math homework for school. Currently using model. Need answers with equations.

Use a table of function values to approximate an x-value in which the exponential function exceeds the polynomial function. In your final answer, include the table of function values. f(x) = 2x h(x)...

Write an equation that models the scenario. Let x equal the number of hours and y equal the total cost of the rental. Make a table and find 5 points that satisfy the equation.Graph the relationship...

We're solving rational equations and we get extra credit if we have this problem answered by tomorrow! x+5/x^2-6x-27+x-17/x^2-18x+77=x+1/x^2-14x+33 Please...

Carla and Mandy are solving the inequality below. –4x ≥ 12 Carla says the solution is x ≤ –3, while Mandy says the solution is x ≥ –3. Which student is correct? What mistake was...

Help please. Thank you.

There were 600 people watching a play in a theatre. The number of adults was three times the number of children. The total amount collected from the sale of tickets for the play was $16800. The price...

Please someone help me with this problem thank you.

The center of a circle is located at the point (1,1). The point (-3,4) is located on the circle. a. What is the radius of the circle? b. What is the equation...

Suppose two adjacent endpoints of a rotated square are located at (-3,-7) and (1,-3) on the coordinate axes. a. What is the length of the side of the square? b...

Use absolute value notation to represent the following: a. All numbers x whose distance from -3 is less than 3.2 b. All numbers x whose distance from 2 is less than 2...

Let U={ a,b,c,d,e,f,g,h,I,j,k} Let A = {a,c,d,f,g,i} Let B= {b,c,d,f,g} Let C={a,b,f,I,j} Determine AՈC A. AՈC --- USE COMA TO SEPARATE ANSWERES B. AՈC is the empty set

the derivative of w(x) = 2cotx sin^2x

math question. from your opinion

can you please help me I'm in desperate need of help

How do you make 81 dollars an equal share for 9 people

I have 4320 rolls of tape 2" x 800" and need to know the m2?

The answer has to be in percentage.

Ever since Renata moved to her new home, she's been keeping track of the height of the tree outside her window. H(t)models the height of the tree (in centimeters), t years since Renata moved in...