1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Novay_Z [31]
3 years ago
8

2X plus Y equals 7 3X minus 4Y equals five

Mathematics
1 answer:
Dvinal [7]3 years ago
7 0
\left \{ {{2x+y=7\ \ | *4} \atop {3x-4y=5}} \right. \\\\ \left \{ {{8x+4y=28} \atop {3x-4y=5}} \right. \\+----\\Addition\ method\\\\
11x=33\ \ \ | divide\ by\ 11\\
x=3\\\\y=7-2x\\
y=7-2*3=7-6=1\\\\Solution:\\ \left \{ {{y=1} \atop {x=3}} \right.
You might be interested in
Hans bought 3 CDs that were each the same price. Including sales tax, he paid a total of $53.40. Of that total, $3.60 was tax. W
Jet001 [13]

Answer:

$16.6

Step-by-step explanation:

x is the price of each CD before tax

so 3x + 3.60 = 53.40

3x = 53.40 - 3.60 = 49.80

x = 49.80/3 = 16.6

3 0
2 years ago
Someone help me with this.
Mandarinka [93]

Answer:

2x² + 13x + 15

Step-by-step explanation:

| 2x | 3

x | 2x*x = 2x² | 3*x = 3x

5 | 2x*5 = 10x | 3*5 = 15

We have, 2x² + 3x + 10x + 15

Combining like terms, we would have the final expression as:

2x² + 13x + 15

3 0
2 years ago
What’s the slope of a line that passes through the points (-3,7) and (-3, 4)?
Dmitry_Shevchenko [17]

Answer: The slope should be infinity.

Step-by-step explanation: I hope this helps you!

4 0
3 years ago
Read 2 more answers
1/4 of a pizza is split equally between three sisters. How much of a whole pizza will each sister get?
sattari [20]

Answer:

1/12 of the pizza

Step-by-step explanation:

6 0
3 years ago
Members of the cooking club would like to learn how to make peach ice cream. There are 14 people in the club. Each member will n
ohaa [14]

Answer:

Step-by-step explanation:

Total members = 14

Each member:

Peaches = 3

Pint of cream = 1

Cost

Peaches = x cent

Pint of cream = 46 cent

46 cent = $0.46

Cost per member = 3(x cent) + 0.46

= 3x cent + 0.46

Total cost for all members = 14(3x cent + 0.46)

= 42x cent + 6.44

8 0
3 years ago
Other questions:
  • Round 3,062.845 to 2 decimal places
    14·1 answer
  • Landon and Keira are preparing refreshments for a party. To make fruit punch, they will mix 2 gallons of grape juice with 1 cup
    12·2 answers
  • If x=y-7 what is the value of 3x-3 in terms of y
    5·1 answer
  • What is 6/11 in decimal form, to the nearest hundredth?
    15·2 answers
  • What is 51⁄6 as an improper fraction? For Seneca Learning:
    13·2 answers
  • 17. Let A denote the event that the next request for assistance from a statistical software consultant relates to the SPSS packa
    10·1 answer
  • If f(x) = 1/9x-2, what is f^-1(x)?
    14·1 answer
  • Pls help me 20 points
    10·2 answers
  • Find P(C|Y) from the information in the table. A 5-column table has 4 rows. The first column has entries A, B, C, Total. The sec
    8·1 answer
  • Which ordered pair is a solution of y= 2x + 5?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!