2 years ago

Solve the system of linear equations using elimination. −2x − y = 3 −9x − y = 17

Mathematics

2 answers:

Gnom [1K]2 years ago

4 0

Answer: x=20/7 y=17

Step-by-step explanation:

1) Don't need to solve for y since y is already solved.

2) Solve for x:

-2x-17=-9x+3

-2x-17+9x=-9x+3+9x (Add 9x to both sides)

7x-17=3

7x-17+17=3+17 (Add 17 to both sides)

7x=20( Divide both sides by 7)

x=20/7, y=17

Nat2105 [25]2 years ago

4 0

Answer:

x=20/7 y=17

Step-by-step explanation:

You might be interested in

A box contains 35 coins either nickels or dimes all worth $2.90. How many dimes are in the box?

tino4ka555 [31]

Answer:

There are 23 dimes in the box

Step-by-step explanation:

Let nickels=n

Let dimes=(35-n)

Equation: 0.05n+0.10(35-n)=2.90

Multiply both sides by 100: 5n+10(35-n)=290

-5n+350=290

-5n=-60

n=12

35-12=23

Therefore, there are 23 dimes in the box

3 0

3 years ago

PLEASE HELP THANK YOU!

Vsevolod [243]

Answer:

um wow that is realy hard

Step-by-step explanation:

8 0

3 years ago

Lindsey bought 5 packages containing 4 bracelets in each. She plans to decorate the bracelets and then sell them for $3 each. Ho

ki77a [65]

Answer:she will have 60 dollars left because 5 times 4 is 20 and if she sold them for 3 dollars you just do 20 times 3 and you should get 60

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

In a bag with 3 red chips, 2 yellow chips, and 1 green chip, what is the probability of getting NO yellow chips on the first 2 t

Stolb23 [73]

Answer:

Step-by-step explanation:

total chips = 6

chips not including yellow= 4

simplify 4/6 = 2/3

7 0

3 years ago

What is the solution R-7=1?? Thank

cluponka [151]

Answer: R=8

Step-by-step explanation: R-7=1, R+7=1+7, R=8.

6 0

2 years ago

Read 2 more answers