Graphing Linear Equations Pre-algebra
Can you help me with my ‘Pre-Algebra’ homework?
I had to do 50 problems as a review of all the chapters we did since the beginning of the school year and I have all but 11 done. Can you do them for me? I’ve been trying but I just can’t get them. They are soo tough! And I’m sleepy and can’t sleep until they are done! I have to show all of my work!
(I got the worksheets today!)
1. Simplify 7(3x + 5y) + 5(2x + 7y)
2. Find the LCM of 8xxy and 18xxyyz
3. Express 356 miles in 8 hours as a unit rate.
4. In a scale model of a boat, the tallest mast has a height of 7 inches. If the actual height of the mast is 35 feet, what is the scale of the model.
6. Solve each equation; 7.-4(x+9)= -12x – 4
7. 5n + 6 = 7(n +3) – 3n
8. Solve each inequality:: -4t > -32
9. Find two solutions for the equation 3x + 5y = 10, write the solutions as ordered pairs.
10. Graph y = 2x – 2 by plotting ordered pairs.
11. Solve the system of linear equations y= 4x + 7 and y = -3x by substitution.
THANKS!
1. 21x + 35y + 10x +35y
= 31x + 70y
4. 7 : 35 is 1 : 5
6. -4x – 36 = -12x – 4
-4x + 12x = -4 + 36
8x = 32
x = 32/8
= 4
7. 5n + 6 = 7n + 21 – 3n
5n -7n – 3n = 21 – 6
-15n = 15
n = 15/-15
n = -1
and thats all i can help with, sorry :]
Prealgebra 9.4d – Graphing Linear Equations, Part 2
