Question

solve the following system of equations.
3x - 2y = 6
6x - 4y = 14

Answer 1

use the elimination method...can you do that ?

Answer 2

or multiply first eqn by 2 ,see if that helps ?

Answer 3

this question is false?

Answer 4

what do you mean false ?

Answer 5

2*(3x - 2y) = 12 but second equation says that 6x-4y = 14

Answer 6

3x - 2y = 6 -->(-2)3x - 2y = 6
6x - 4y = 14
-------------
-6x + 4y = - 12 (result of multiplying by -2)
6x - 4y = 14
-------------add
0 + 0 = 2
0 = 2 (incorrect)
The solution to this equation is NO SOLUTION

Answer 7

(0,0)
(6,14)
infinitely many solutions
no solutions

Answer 8

@kelliegirl33 i think your right thanks

Answer 9

if the equation would have equaled 0 = 0, then it would have been infinite solutions, but since the equation equals 0 = 14, then there is no solution :)

Answer 10

Trevors dad decided to get him a cell phone for his birthday. cell plus has a plan that costs $24.00 per month plus an additional $0.06 per minute. cell best has a plan that costs $30.00 per month plus an additional $0.05 per minute. how many minutes can trevor talk and both cell plans cost the same amount? @kelliegirl33

Answer 11

m = months
x = minutes

24 + .06x = 30 + .05x (combine like terms)
.06x - .05x = 30 - 24
.01x = 6
x = 6/.01
x = 600

check..
24 + .06(600) = 30 + .05(600)
24 + 36 = 30 + 30
60 = 60 (correct)

Trevor can talk 600 minutes

Answer 12

forget about the m = months....I didn't need that

Answer 13

He can talk 600 minutes per month

Answer 14

there were 150 freshman and sophomores at the high school musical Reese and her friends attended. freshman tickets were $2.00 each and sophomore tickets were $3.00 each. the receipts for freshman and sophomore tickets totaled $390. how many sophomores bought tickets?

Answer 15

f = freshmen
s = sophomore

f + s = 150 --> f = 150 - s
2f + 3s = 390

now sub 150 - s in for f
2f + 3s = 390
2(150 - s) + 3s = 390
300 - 2s + 3s = 390
s = 390 - 300
s = 90

now sub 90 in for s
f + s = 150
f + 90 = 150
f = 150 - 90
f = 60

check...
2f + 3s = 390
2(60) + 3(90) = 390
120 + 270 = 390
390 = 390 (correct)

The sophomores that bought tickets were 90.

Answer 16

an airplane flew 3.5 hours with a 40 mph head wind. the return trip with a tail wind of the same speed took 2.5 hours. find the speed of the plane in still air.

Answer 17

I am not sure how to do these kinds of problems...sorry

Answer 18

its okay ill post it :) thank for your help though :)
would you mind if i asked u for help some other time?

Answer 19

you can ask me anytime....I just hope I know how to do the problem you asked

Answer 20

ok tlk to u later :)

Answer 21

ok...bye for now :)