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
Naddik [55]
2 years ago
15

Helppppppppppppp!!!!!!

Mathematics
2 answers:
n200080 [17]2 years ago
8 0

Question 1:

For this case, let the variable "x" be the number of girls in the classroom. Let the variable "y" be the number of boys in the classroom.

We propose the equations:

x + y = 22\\x = y + 12

We substitute the second equation in the first:

y + 12 + y = 22\\2y = 22-12\\2y = 10\\y = 5

So, in the classroom there are 5 boys.

x = 5 + 12\\x = 17

So, there are 17 girls.

Answer:

5 guys

17 girls

Question 2:

For this case we have to:

Let x be the variable that represents the amount of money Jamie has.

Let y the variable that represents the amount of money that Kristen has

We have to:

x = 2y\\x + y = 36

We substitute the first equation in the second:

2y + y = 36\\3y = 36\\y = \frac {36} {3}\\y = 12

Looking for the value of x:

x = 2 (12)\\x = 24

Answer:

So, Jaime you have $ 24 and Kristen you have $ 12.

Question 3:

For this case we have to:

Let "x" be the variable that represents the number of dogs in the Pet Stop.

Let "y" be the variable that represents the number of cats in the Pet Stop.

We have to:

x + y = 15\\4x = y

We substitute the second equation in the first:

x + 4x = 15\\5x = 15\\x = \frac {15} {5}\\x = 3

We look for the value of y:

y = 4x\\y = 4 (3)\\y = 12

So, there are 12 cats and 3 dogs.

Answer:

12 cats

3 dogs

Anon25 [30]2 years ago
6 0

Answer:

<h2>There are 17 girls and 5 boys.</h2>

Step-by-step explanation:

Let b and g represent the number of boys and the number of girls respectively.

Then b + g = 22 (students), and g = b + 12.

Substituting b + 12 for g in b + g = 22 yields:

b + (b + 12) = 22

or:

2b + 12 = 22, or 2b = 10, so that b = 5.

Then g = b + 12 = 5 + 12 = 17.

There are 17 girls and 5 boys.

You might be interested in
I NEED HELP PLEASE WITH PART 2, THANKS!
EleoNora [17]

Steps to solve:

-6w - 8 + 15w = 2w - 8 + 7w

~Combine like terms

9w - 8 = 9w - 8

~Add 8 to both sides

9w = 9w

~Divide 9 to both sides

0 = 0

All real numbers are solutions.

Set builder notation: {x | R}

Best of Luck!

8 0
2 years ago
What is the inverse of y=x+5/3
fenix001 [56]

Answer:

x= -5/3

Step-by-step explanation:

6 0
2 years ago
Please help guys ❤❤❤❤​
steposvetlana [31]

Answer:

Area will be 397.54

Step-by-step explanation:

See attachment.....

7 0
2 years ago
Solve the following system by using substitution:<br> x = -3y - 17<br> 2x + 3y = -7
lana [24]

Answer:

x=10 and y=−9

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
12+[2-(4x5)]divided by 7+1
kodGreya [7K]

Answer:

10.4285714286

5 0
3 years ago
Read 2 more answers
Other questions:
  • WILLL GIVE BRAINLIEST + 50 POINTS FOR HELP!!!!<br><br><br>PLZZZZZZ IM TIMED
    11·2 answers
  • (15,-9) is dilated by a scale factor of 3 what is its new location
    13·1 answer
  • What times what equals 90 ?
    8·2 answers
  • 28.) Find the slope of the line that passes through the pair of points.
    5·1 answer
  • Please answer asap!!!!
    6·1 answer
  • -2x + 3y =-9<br> X+y = 2
    9·1 answer
  • Consider the diagram and angle measurements shown below.
    11·2 answers
  • Which situation would be represented by the integer -8? A hole 8 feet deep. An 8-yard pass. You earn $8. A temperature of 8°F.
    10·2 answers
  • It's due in 30 minutes!!
    15·1 answer
  • Not sure I understand 23-26. Can someone explain?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!