Mathematics

Math help!!!!!!!!!!!!!!!!!!!!

7/2x - 1= 2x+5 How do i get rid of the fraction??-7/2x-1=2x+5 add 1 to both sides. 7/2x=2x+6 multiply each side by 2 7x=4x+12 3x=12 x=4. to get rid of any fraction multiply that fraction by wha

Write an equation in slope-intercept form for the line that passes through (-1,2) and (3,-7)

a. y = 5/4 x - 3/4 b. y = -4/5 x - 6/5 c. y = 4/5 x - 6/5 d. y = -5/4 x - 13/4-Calculate the Slope: m = Δy/ Δx m = -2-(-7)/-1-3 m = 5/-4 Now we can solve for the y-intercept by plugging any x and

Would the point be n=100

You create a graph of cost function C=20n +500 of a new bookstore, and you also graph the revenue function, r=25n, where n is the number of books sold. On your graph would the point n= 100 be in the l

What did I do wrong, check my working, please

Sorry I keep posting questions. Financial maths is hard. A kitchen cupboard manufacturer is talking to a satisfied consumer. The consumer says he got a very good deal from the retailer, because he pa

What equation represents the cost function

Bookstore costs $75 a day to keep open, and spends $10 for each book it sells. The store charges $15 for each book it sells. If n represents the number of books sold, which equation represents the cos

Trigonometric function question

If the terminal side of an angle G lies on the line y = 3x; x -y = 3x x Find the cos(G) and the sin(G) x = -1 y = -3 sqrt(x^2 + y^2) = sqrt(10) cos(G) = x / sqrt(10) = -sqrt(10) / 10 sin(G) = y

Algebra 1 questions 10pts

A)Solve the system of equationsx+6y=7 (1)x=2-6y(2)Answer will be as an ordered pair B)Solve the system of equations 7x-9y=-369y-7x=36 What is the solution of the system? Is the system consistent or i

Solve for x: (2)/(x-2)+(7)/(x2-4) =(5)/(x)

a) x= -4/3 and x = -5 b) x= -4/3 and x = 5 c) x= 4/3 and x = -5 d) x= 4/3 and x = 5 Solve for x: (4/x)+(4/x2-9)=(3/x-3) a) x = –4 and x = –9 b) x = 4 and x = –9 c) x = –4 and x = 9 d) x = 4 and

Subtraction equations - Homework help

I need assistance in showing my son how to solve the following subtraction equations. I know that you are supposed to isolate the variable on one side.How would i do i solve the following problems. Th

Functions and compositions

http://img829.imageshack.us/img829/189/imag0146l.jpg How would you complete the problems that involve f(x) and h(x). I have never seen this before.... what do I do with them? Please do 1, 3, 5,and t

NEED help using this formula A=P(1+r/n)^nt

I keep getting different answers every time =( the problem is : henry wants to put his money in abank of cash he get 6% interest, compound semi- annually he deposit 1,000 how much will he get in one

How to get this integration

∫((x)/(x+6))dx Cannot seem to get it right using the partial fractions technique, as is the section I am doing.-∫(x)/(x+6) dx Let u = x + 6 du = dx ∫(u - 6) / u du ∫du - 6∫du/u u - 6ln|u| + C x + 6

How many real solutions does the equation x^2 + bx + 4 = 0 have if b>0

a. none b. one c. two d. cannot be determined Please help me out! I dont know how to solve this problem, so an explanation would be appreciated; it will also be great if you could supply me with an a

HELP MATH PROBLEM?? thanks!

Bookstore costs $90 a day to keep open, and it spends $13 for each book that it sells. If each book sells for $16. What is the break-even point for this bookstore? A.n=30 b.n=13 c.n=16 d.n=3-Profit =

Which equation represents the PROFIT??? HELP

Boathouse costs $2750 a month to operate and it spend $600 each month for every boat that it docks. The boathouse charges a monthly fee of $850 to dock a boat. If n is the number of boats. Which equat