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Alborosie
3 years ago
12

Use this system of linear equations to solve for x. 3x+5y=6 and 2x+y=4​

Mathematics
2 answers:
Oduvanchick [21]3 years ago
8 0

Answer:

x=2

HPT 3x+5y=6 (1) và 2x+y=4 (2)

Nhân phương trình (2) với 5 để hệ số y của 2 phương trình bằng nhau. Ta có:

(2)⇔ 10x+5y=20(3)

Trừ (3) cho (1), có: 7x+0y=14⇒x=2

svp [43]3 years ago
4 0

Answer:

3x+5y=6.....eqn 1

2x+y=4.......eqn 2

y=4-2x.....eqn 3

Step-by-step explanation:

substitute eqn 3 into eqn 1

3x+5(4-2x)=6

3x+20-10x=6

-7x = -14

x=2

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Joanna purchased four boxes of cookies for a party. Each box cost $3.28, including tax. PLEASE HELP!!! 100 POINTS!!! Which expre
Olegator [25]

Answer:

4 / ($3.28)   is the correct answer

Step-by-step explanation:

As cost of  one box is  $3.28

the cost of four boxes will be  4 divided by the cost of one box....so that why the  4/($3.28) is correct option

7 0
3 years ago
The Taylor family went on vacation. They traveled 412 miles on Monday. At the end of the day Tuesday, the average speed of the c
mixer [17]

Answer:

d = 56x + 412

Step-by-step explanation:

To find the total number of miles traveled on Monday and Tuesday, use a linear equation to write the function.

y = mx+b where m is the speed or rate of change and b is the starting point.

The starting point on Tuesday is 412 miles. This is b.

The number of miles traveled on Tuesday is found by calculating 56 miles times the number of hours traveled.  This is the slope or m.

So the equation is d = 56h + 412.

7 0
3 years ago
Use two points to write an equation for the fuction shown.​
Rama09 [41]

Answer:

Step-by-step explanation:

100 is 4 times 25

25*4=100

so if we just multiply 26/25 we can find the percent

4*26/25=104/100

104%

8 0
2 years ago
Are the graphs of the lines in the pair parallel? Explain.<br><br> y = 3/7x + 11<br> –3x + 7y = 13
Kobotan [32]
Yes they will be parallel. Now you try to solve it.
5 0
3 years ago
Read 2 more answers
While backpacking today, Mia climbed up 985 ft to the peak of the mountain and then climbed down 320 ft to a campsite. If she st
Flauer [41]
The elevation of Mia's campsite is 5,244 ft. Just add the elevation in which she started in the morning plus the 985 ft and then subtract it by 320.
6 0
3 years ago
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