Question

help

Answer 1

what is the solution to the system of equations? Use the linear combination method 5x+2y=-4 -3+2y=12

Answer 2

@jhonyy9

Answer 3

@imqwerty

Answer 4

@F_Jayyy

Answer 5

@LegendarySadist

Answer 6

options please

Answer 7

-2,3 2,-7 0,-2 4,0

Answer 8

well this is all i got

Answer 9

.Solve, using linear combination.

5x + 2y = –4
–3x + 2y = 12

Rearrange equation 1

2y = -4 - 5x

Combine with equation 2

-3x - 4 - 5x = 12
-8x = 16

x = -2
y = (-4 + 10) / 2 = 3

Answer

C.
(–2, 3)

2.Use the graph to state the solution for the system.

x – y = 3 (line a)
x + y = 3 (line b)

Re-arrange into the form y =

y = x - 3 (line a)
y = 3 - x (line b)

Now plot these on a graph, since they are straight lines you will only need two points each

line a (0, -3) (3, 0)
line b (0, 3) (3, 0)

You will see that your two lines intersect at the point (3, 0) which is the solution

C.
(3, 0)

3.How many solutions are there to the following system of equations?

3x – 9y = 0
–x + 3y = –3

Divide the first equation by 3, and rearrange

3y = x

Rearrange the second equation

3y = x - 3

You see that on a graph these two lines would be parallel, therefore the system has no solutions

A.
0

4.Solve this system of equations using any method.

3x – y = 4
x + 2y = 13

Re-arrange equation one and substitute into equation 2

y = 3x - 4
x + 6x - 8 = 13
7x = 21

x = 3
y = 5

C.
(3, 5)

5.Which shows a system of equations to solve the following problem?
Let c be the number of child tickets and a be the number of adult tickets. Each child ticket for a ride costs $3, while each adult ticket costs $5. If the ride collected a total of $150, and 40 tickets were sold, how many of each type of ticket were sold?

Number of tickets sold is 40 therefore a+c = 40
The ride collected 150 therefore 150 = 3c + 5a

A.3c+5a=150
a+c=40

6.Each child ticket for a ride costs $2, while each adult ticket costs $6. If the ride collected a total of $148, and 38 tickets were sold, how many of each type of ticket were sold?

2c + 6a = 148
a + c = 38

Substitute equation 2 into equation 1

76 - 2a + 6a = 148
4a = 72

a = 18
c = 20

B.
20 child and 18 adult


7.How many solutions are there to the following system of equations?

6x – 9y = –9
2x – 3y = –6

Divide the top equation by 3

2x - 3y = -3

These two lines are parallel so there is no solution

D.
0

8.In a recent golf match, Tiger’s score was 4 less than Phil’s score. Their combined scores totaled 140. Which of the following pairs of equations can be used to determine their scores? Let p represent Phil’s score and t represent Tiger’s score.

Tigers score was 4 less than Phils, t = p -4
Combined score was 140, t+p=140

A.
p + t = 140
p – t = 4

9.Solve the following system of equations.

d + e = 6
d – e = 4

Substitute equation 2 into equation 1

d + d - 4 = 6
2d = 10
d = 5
e = 1

A.
(5, 1)

10.Which equation will result if the substitution method is used to solve the following system of linear equations?

x – y = 7
x = y + 3

Re-arrange equation 1 y = 7 - x, substitute into equation 2

x = (7 - x) + 3

B.
x = (7 – x) + 3


11.Solve the following system of equations by linear combination:

3x + 2y = –7
5x – 4y = –19

From equation 1 -4y = 14 + 6x

5x + 14 + 6x = -19
11x = -33

x = -3
y = 1

B.
The solution is (–3, 1).

Answer 10

thanks have to be sure

Answer 11

hope it helps

Answer 12

and really fast can you help me with somthing

Answer 13

tag me

Answer 14

what is this fan and medal thing

Answer 15

oh u medal people if they help u with something and u can fan anyone u choose that is good or whatever

Answer 16

oh cool thanks

Answer 17

but i really hope i helped im really smart and i want to put this gift to a good cause

Answer 18

so will you medal me

Answer 19

@ChantySquirrel1129**

Answer 20

i think this is wrong its someonev elses posting

Answer 21

@jhonyy9

Answer 22

@narissa are you here now ?

Answer 23

yes

Answer 24

so what is the first exercise ?

Answer 25

its the first thing that i posted some other posted all that other stuff

Answer 26

sorry i dont understand your words

Answer 27

please give this exercises - because here is in the night 1,17 minute o clock

Answer 28

what is the solution to the system of equations? Use the linear combination method 5x+2y=-4 -3+2y=12

Answer 29

next -3 you missed the x - yes ?

Answer 30

do you know what mean linear combination ?

Answer 31

so the answer is -2,3?

Answer 32

do you like learn it how to solve or directly answers ?

Answer 33

5x+2y=-4 -3+2y=12 - here where wan being x ?

Answer 34

ohhh its -3x sorry

Answer 35

@Mehek14

Answer 36

ok.

5x+2y=-4 - multiplie first equation by -1 and assume the same terms so what will get ?
-3x+2y=12

-5x-2y=4
-3x+2y=12
-------------
-8x 0 = 16

-8x=16

x = 16/(-8)

x= -2

so can you calculi now the y alone - ok- ?

Answer 37

so that was right -2,3

Answer 38

i dont know - can i check your calculi here now ?

Answer 39

yes

Answer 40

yes -2 and 3 are right sure - do you have again ?

Answer 41

i will post new one

Answer 42

ok