Solve the following equation for the unknown: 7x - 3 = 18
Graph the following equations; calculate the slope, x-intercept, and y-intercept, and label the intercepts on the graph.
3. y = x + 3
4. y = -2x - 7
5. (5 points) 2x + 3y = 9
6. (5 points)
A consumer electronics company sells 6.7 million MP3 players per month at a price of $100 apiece; when the price is lowered to $80, the company sells 10.2 million players per month. How many MP3 players can the company expect to sell per month at a price of $75?
7. (3 points)
The points (1,5), (4,5), and (1,0) represent three corners of a rectangle; find the coordinates of the fourth point.
8. (5 points)
Seven inches are equivalent to 17.78 cm. Find the equation converting length in cm to length in inches. What is the length in inches of a 96.2 cm bar?
9. (4 points)
Find an equation in slope-intercept form passing through the points (2,5) and (7,-3).
10. Sales tax in Pennsylvania is 6%. Create an equation for the total
2006-10-12 19:01:55 · 9 answers · asked by pmgstudios 1 in Science & Mathematics ➔ Mathematics
hmm, urgent... is it due tomorrow?
2006-10-12 19:10:18 · answer #1 · answered by chris perdall 2 · 1⤊ 0⤋
1.5x=20
x=20/5=4
2.7x-3=18
7x=21
x=21/7=3
3.slope=1
x intercept=(-3,0)
y intercept=(0,3)
4.slope=-2
x intercdept=(-7/2,0)
y intercept=(0,-7)
5.3y=-2x+9
y=(-2/3)x+3
slope=-2/3
x intercept=(9/2,0)
y intercept=(0,3)
6.tunover @$100=6.7^10^8
turnover @$80=8.6^10^8
slope=2.1*10^8/20
calculate for $75 price the turnover
7.letthe points be A(1,5),B(4,5),C(1,0) and D(x,y)
D=(4,0)
8.17.78cm=7"
1cm=7/17.78
96.2 cm=96.2*7/17.78
9.equation=(y-5)/(-3-5)=(x-2)/(7-2)
5(y-5)=-8(x-2)
5y-25=-8x+16
5y=-8x+41
y=(-8/5)x+(41/5)
10.total=P*1.06
2006-10-12 19:20:13 · answer #2 · answered by raj 7 · 2⤊ 0⤋
6)slope = (100-80)/(6.7-10.2) = -40/7
100 = -(40/7)x+c => c = 968/7
c-75 = (40/7)x => x=11.075
7) (4,0)
8) x*7=17.8 => x = 17.8/7 = 89/35
x*89/35 = 96.2 => x = 37.83inches
9)slope = (-3-5)/(7-2) = -1.6
y = -1.6x+c => 5 = -3.2 + c => c = 8.2
=> y = -1.6x+8.2
2006-10-12 19:22:51 · answer #3 · answered by superfly 1 · 0⤊ 0⤋
You must be really bored. Some of the answer you seek such as graphing cannot be responded unless it is descriptive writing. The reply is not designed to show graphic answers. Do your homework and stop
lallygagging
on the Internet.
2006-10-12 19:21:07 · answer #4 · answered by Anonymous · 0⤊ 1⤋
This is just what I need to sort out my chaotic life. At last some sort of a system to things ... a real bedtime treat !
2016-05-21 22:14:17 · answer #5 · answered by Anonymous · 0⤊ 0⤋
I didnt go my math homework in hs so im not doing urs sorry
2006-10-12 19:13:40 · answer #6 · answered by Ain't my baby gorgeous 2 · 1⤊ 0⤋
You slack sh*t - do you homework yourself. You'll thank us in 5 years time.
2006-10-12 19:04:22 · answer #7 · answered by mmasseychase 1 · 1⤊ 0⤋
pre-algebra homework? and your asking on yahoo answers? psh it would be way faster to just do it yourself. lol.
2006-10-12 19:06:18 · answer #8 · answered by band_being 2 · 1⤊ 0⤋
Do your own homework . Who ask you not to pay attention in class? You were asking for it !
2006-10-12 19:11:32 · answer #9 · answered by Wide Ruled Paper 3 · 1⤊ 2⤋