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
Taya2010 [7]
3 years ago
11

- 2x + 5y = 17 \\ x + y = 9" alt=" - 2x + 5y = 17 \\ x + y = 9" align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
Vika [28.1K]3 years ago
6 0

Hello from MrBillDoesMath!

Answer:

x = 4, y = 5

Discussion:

-2x + 5y = 17          (*)

x     +  y  = 9            (**)

Multiplying (**) by 2 gives

2x + 2y = 18            (***)

Adding (*) and (***) gives

(-2x + 5y) + (2x + 2y) = 17 + 18              =>

(-2x + 2x) + (5y + 2y)  =35                    => as -2x + 2x = 0 and 5y +2y = 7y

0 + 7y = 35                                           => divide both sides by 7

y = 35/7 = 5

Substituting y = 5 in (**) gives x + y = 9 or x + 5 = 9 => x = 9-5 = 4

Thank you,

MrB

You might be interested in
I'll give you brainlies if you help me on this!
ryzh [129]

Answer:

5/4 ounces.

Step-by-step explanation:

There are 4 marks. So 1/4 is the smallest one. There are 5 of them. 5x1/4 is 5/4 or 1 1/4

3 0
2 years ago
Read 2 more answers
I need help with number 2 please.
Vedmedyk [2.9K]
The answer is 73.33333333 (repeated). You can also write it as 73 or 73.3 with a line over the 3 (after the decimal point) to indicate it being repeated.
8 0
3 years ago
The​ day's high temperature in St. Louis comma Missouri was recorded as 77 degrees' F. Use the formula Upper C=5/9(F-32) to writ
ludmilkaskok [199]

Answer:

The​ day's high temperature written as degrees Celsius is 25 degrees' Celsius.

Step-by-step explanation:

The​ day's high temperature in St. Louis ,Missouri was recorded as 77 degrees F.

We are supposed to find the​ day's high temperature written as degrees Celsius.

Formula : C=\frac{5}{9}(F-32)

Substitute the value of F is 77 degrees

So,C=\frac{5}{9}(77-32)

C=\frac{5}{9}(45)

C=25

Thus, The​ day's high temperature written as degrees Celsius is 25 degrees' Celsius.

6 0
2 years ago
I need to know the answer to number one
Law Incorporation [45]
Supplementary angles are two angles whose measures sum to a 180 degrees and complementary are the sum have to add up to 90 degrees.So 180÷2=90;90÷2=45;180÷6=30 and 90÷6=15.Altough the answer is A.
5 0
3 years ago
Each tile costs 80 cents how much change would i get back if i bought 192 tiles with 200 dollars
Maksim231197 [3]
Cost of 192 tile at $0.80 =   192 x .80 = $153.60
       Change due from $200.00     =$200 - $153.60= $46.40

3 0
3 years ago
Other questions:
  • Greta made the following scores on her first semester history tests: 60, 84, 88, 94, 94, 96. Which measure would she use in summ
    15·2 answers
  • Simplify the expression.
    10·1 answer
  • 50 points
    13·1 answer
  • Write an equation for the translation of y = |x|.
    7·1 answer
  • What percentage of the total hours was spent jogging
    13·1 answer
  • How do you ratify the denominator for 2/ 2(sqrt2)? When I multiply by sqrt2/sqrt 2 I'm still left with a radical in the denomina
    11·1 answer
  • Who knows the answer to do this with full work
    7·1 answer
  • tavyon can ride his bike at a constant rate of 12 miles per hour. how long would it take him to ride 66 miles
    12·1 answer
  • How many adult tickets were sold if each adult ticket sold was $6 and each student ticket was $4.50 and 260 tickets were sold fo
    5·1 answer
  • What is 57,640 rounded to the nearest thousand
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!