Question

Which ordered pair (p, r) is a solution to the given system of linear equations?

Answer 1

5p-3r=1
8p+6r=4

answer choices
(-1,-2)
(-2,-1)
(2/9,1/3)
(1/2,2/9)
neep help asap

Answer 2

do you know how to apple elimination or substitution method?

Answer 3

*apply

Answer 4

make them equal to zero?

Answer 5

using the elimination method means you have to eliminate one variable in order to solve for the value of the other variable. Substitution method, you have to rearrange one of the equations in terms of a variable and substitute it to the next equation in order to solve for another variable.

Now which method do you want to use?

Answer 6

elimination

Answer 7

i think the answer is A though?

Answer 8

have you tried solving it? did you get A?

Answer 9

yes, i got A

Answer 10

i don't think it's right because i got a different one.
can you show me your solution?

Answer 11

what about this one?


Veda solves the following system of linear equations by elimination. What is the value of x of the solution?

6+4x-2y=0
-3-7y=10x

-20
-1
1
20

Answer 12

how do i take a picture? i thought it was either D or A

Answer 13

Its D! I plugged the answers in

Answer 14

first rearrange the equations:
4x-2y=-6
10x+7y=-3

let's eliminate y by multiplying eqn 1 by 7 and eqn to by 2
7(4x-2y=-6)
28x-14y=-42

2(10x+7y=-3)
20x+14y=-6

now, add the two equations you'll get: 48x=-48, so x=-1

Answer 15

wow, awesome okay! i need help with 2 more

Answer 16

this time you have to do it:) i'll check how you do it

Answer 17

André solves the following system of equations by elimination.

3a+6b=12
-3a+6b=-12
what is the resulting equation?
12b=0
6a=0
-6a=0
-12b=-24

Answer 18

okay i can try, but im on a timed test with 15 minutes remaining and one question left

Answer 19

oh wait, i can do that one

Answer 20

sorry but we are just here to guide you for you to get the answer and not to provide answer because that's considered cheating

Answer 21

Which statement correctly explains how Andre should find a solution to the following system of linear equations using elimination?

8s-9t=15
7s-2t=12
Multiply the first equation by –7 and the second equation by 8, and then subtract.
Multiply the first equation by 7 and the second equation by 8, and then subtract.
Multiply the first equation by 2 and the second equation by 9, and then add.
Multiply the first equation by –2 and the second equation by 9, and then subtract.

stuck!

Answer 22

okay well ive been plugging in for each problem and im not getting an answer for this one

Answer 23

what's the purpose of elimination? as i've mentioned before: using the elimination method means you have to eliminate one variable in order to solve for the value of the other variable. so what should you do to eliminate one variable in the equations?

Answer 24

eliminate the s or t?

Answer 25

right, so what should you do to the equations to eliminate one of them?

Answer 26

add in 0 for one of them?

Answer 27

nope. try applying the choices on the equations. If a choice eliminates one of the variables then that would be the right one, if not, try another one.

Answer 28

ive plugged them all in and i keep getting 2 for most of the answers.

Answer 29

ill keep trying

Answer 30

don't PLUG the values, APPLY them.

say for example, the last choice: Multiply the first equation by –2 and the second equation by 9, and then subtract.
so first equation multiply by -2 it will be -2(8s-9t=15) = ?
then 2nd equation multiply by 9 it will be 9(7s-2t=12) =?
then subtract the two equations and see if one variable is eliminated or not.

Answer 31

thank you! i got an 80 on the test:)

Answer 32

can i still use yall for help?

Answer 33

if we will help you, please try to help yourself also because we are not here to provide you with answers. it's against our Code of Conduct: http://openstudy.com/code-of-conduct

Answer 34

i understand, i didnt expect answeres. thank you

Answer 35

answers

Answer 36

:) welcome to openstudy

Answer 37

At a farmer’s market, a basket of strawberries costs $20 and a basket of peaches costs $18. On Saturday, $430 worth of strawberries and peaches were sold, and a total of 23 baskets were sold. If x represents baskets of strawberries and y represents baskets of peaches, how many baskets of peaches were sold on Saturday?
so so far i have written down the different variables