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dalvyx [7]
3 years ago
11

Solve the system of linear equations using the substitution method.

Mathematics
2 answers:
Aloiza [94]3 years ago
7 0

Answer:

shoot this is wrong dont look

Step-by-step explanation:

If I know this...

You would have to plug in <em>y </em>in equation two for y<em> </em>in equation one. So it would become:

-2x+3(7x-2)=13

And simplifying that further it would be:

-2x+21x-6=13

Combining like terms would looks like this:

19x=7

And solving for x would looks like this:

x=7/19

Sergeeva-Olga [200]3 years ago
5 0

Answer:

x = 1; y = 5

Step-by-step explanation:

-2x + 3y = 13 ;

y = 7x - 2

Since the second equation is already solved for y, substitute y of the first equation with 7x - 2.

-2x + 3y = 13

-2x + 3(7x - 2) = 13

-2x + 21x - 6 = 13

19x - 6 = 13

19x = 19

x = 1

Now substitute x of the second equation with 1 and solve for y.

y = 7x - 2

y = 7(1) - 2

y = 7 - 2

y = 5

Solution: x = 1; y = 5

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This is based off my previous question asked. please help!
Nana76 [90]

Answer:

30

Step-by-step explanation:

just trust me A+ here you come

6 0
3 years ago
Read 2 more answers
The Science Club wants to print stickers to promote their club and an interest in science. They got a quote to print the sticker
zloy xaker [14]

Answer:

The system of equations =

25 + 0.05x = 12 + 0.09x

The number of stickers where the cost of both printers to be equal is 325 stickers

Step-by-step explanation:

Let the number of stickers = x

Printer 1

Pop Art Printing would charge a $25 setup fee and $0.05 per sticker.

$25 + $0.05× x

25 + 0.05x

Printer 2

Sticky Slogans would charge a $12 setup fee and $0.09 per sticker.

$12 + $0.09 × x

12 + 0.09x

We equate both equations together

The system of equations =

25 + 0.05x = 12 + 0.09x

Collect like terms

25 - 12 = 0.09x - 0.05x

13 = 0.04x

x = 13/0.04

x = 325 stickers

Therefore, the number of stickers where the cost of both printers to be equal is 325 stickers

3 0
3 years ago
I just need the a-b answer
slavikrds [6]

Answer:

A: volume is 12 B: Is 89.76

Step-by-step explanation:

6 0
3 years ago
Cho A là ma trận vuông cấp 2 và detA=11, Khi đó det(3A)=
RUDIKE [14]
3^2. DetA = 9.11 = 99
3 0
3 years ago
6. ItcostJustin$100tohavecableTVinstalledinhishouse.Eachmonthhepaysanaccessfeeplus a tax of 7% of his monthly bill. After 6 mont
kiruha [24]

The known is

       $100 install

       6 months

       $350.38 total

       7% of bill in taxes

Unknown

         monthly access fee = f

100 + 6( f + 0.07f ) = 350.38

100 + 6f + 0.42f = 350.38

100 + 6.42f = 350.38

- 100                - 100

-----------------------------

6.42f = 250

-------     ------

6.42       6.42

f = $39 monthly cable fee

3 0
4 years ago
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