I have been racking my brains with no success. How do i do these ;(?
Directions: Use following system of equations for exercises.
{4x - 10y = -3
{.x + 12y = 3.5
1) If you want to solve the system by eliminating the x terms (with addition), by what would you multiply the second equation?
2) If you want to solve the system by eliminating the y terms (with addition), by what would you multiply the first equations?
3) What is the value of x in the solution? enter your answer as a decimal.
4) What is the value of y in the solution? Enter your answer as a decimal.
2006-10-15 12:28:51 · 6 answers · asked by udienowslave90 1 in Science & Mathematics ➔ Mathematics
all i need is how to do at least one in detail so i can do the rest. How does this all work?
2006-10-15 12:44:00 · update #1
thank you for the answers now can someone explain how he got them? Except the first two that explain i think....
2006-10-15 12:47:56 · update #2
4x - 10y = -3
x + 12y = 3.5
1) If you want to solve the system by eliminating the x terms (with addition), by what would you multiply the second equation?
-4
4x-10y=-3
-4x-48y=-14
-58y=-17
y=17/58=.239
2) If you want to solve the system by eliminating the y terms (with addition), by what would you multiply the first equations?
1.2
4.8x - 12y = -3.6
x + 12y = 3.5
5.8x=-.1
x=-1/580
3) What is the value of x in the solution? enter your answer as a decimal.
x=-.0017
4) What is the value of y in the solution? Enter your answer as a decimal.
y=.239
2006-10-15 12:53:23 · answer #1 · answered by yupchagee 7 · 16⤊ 0⤋
1) mulitiply every term in the second equation by 4; subtract the resulting equation from the first one.
2) multiply every term in the first equation by 6/5; add the resulting equation to the second one.
3) x = 0.01724
4) y = 0.2931
2006-10-15 12:43:14 · answer #2 · answered by Computer Guy 7 · 0⤊ 0⤋
4x+3=10y
y=4x/10+3/10 so simplify and put this value in for y and solve for x.
2006-10-15 12:41:39 · answer #3 · answered by Joseph 2 · 0⤊ 0⤋
1.multiply by -40
2.by 1.2
4.4x-10y=-3
4x+120y=35
110y=38 so x=35/110=0.32
3.4.8x-12y=3.6
0.1x+12y=3.5
4.9x=7.1
x=7.1/4.9=1.45
2006-10-15 12:45:42 · answer #4 · answered by raj 7 · 0⤊ 0⤋
Work them out with your teacher in detention after she finds out about this.
2006-10-15 12:50:20 · answer #5 · answered by Anonymous · 0⤊ 0⤋
this is cheating you know
2006-10-15 12:31:04 · answer #6 · answered by Max K 3 · 0⤊ 0⤋