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
Vikki [24]
3 years ago
15

5x-3y=18 3x+3y=30 Please help

Mathematics
1 answer:
bagirrra123 [75]3 years ago
7 0

Solve for x in 5x - 3y = 18

x = 3(6 + y)/5

Substitute x = 3(6 + y)/5 into 3x + 3y = 30

9(6 + y)/5 + 3y = 30

Solve for y in 9(6 + y)/5 + 3y = 30

y = 4

Substitute y = 4 into x = 3(6 + y)/5

x = 6

Therefore,

<u>x = 6</u>

<u>y = 4</u>

You might be interested in
I don't understand the question
sladkih [1.3K]

Answer: 7 pigeons sitting on the branches,  5 pigeons under the tree

=12 in total

Step-by-step explanation:

Upper branch has x pigeons, lower has y.

Top branch said: "If one of you flies up to us our number will be double yours":

Well, if one of the bottom branch flies up, the top branch will have x+1 birds and the bottom will have (y−1). The top will have double the bottom, so:

x+1=2(y−1)

Top branch said: "If one of us flies down to you, our numbers will be equal":

Now, the top branch will have x−1 and the bottom y+1. The numbers should be equal:

x−1=y+1

6 0
1 year ago
Why is it important to know how to interpret a remainder?
tino4ka555 [31]
I'm thinking if you are dividing an odd number you might have a remainder it's important because you need to use the remainder, you can ignore it or add it to the number, interpreting numbers means you are trying to find out what you do with the remainder but I'm not always right.
8 0
3 years ago
Read 2 more answers
Someone please help answer this question!!!!!! ​
nignag [31]
I can’t see your question
6 0
3 years ago
Find the coordinates of the point on the curve y = 2x² - x - 1 at which the gradient is 7
madreJ [45]

Answer:

See below

Step-by-step explanation:

The derivative of the function is the slope

2x^2 - x -1       take derivative  ( f ' )

4x -1                 equate to 7

7 = 4x -1

x = 2        sub into the original equation to find y = 5

5 0
2 years ago
If f(x)=3(x+5) +4/x, what is f(a+2)​
tamaranim1 [39]

Answer:

f(a+2)=3(a+7)+4/(a+2)

Step-by-step explanation:

To determinef(a+2) you need to substitute a+2 for each occurrence of x in the given function. See below for full explanation.

Explanation:

If

f(x)=3(x+5)+4/x

Then  

f(a+2)=3(a+2+5)+4/a+2

Simplifying gives:

f(a+2)=3(a+7)+4/(a+2)

5 0
3 years ago
Other questions:
  • a football team drank an entire 50-gallon cooler of water and half as much again. how much water did they drink
    11·2 answers
  • The path of a football kicked by a field goal kicker can be modeled by the equation y = –0.03x2 + 1.53x, where x is the horizont
    13·2 answers
  • In a population, 11% of people are left handed. In a simple random sample of 160 people selected from this population, the propo
    5·1 answer
  • NEED HELP NOW 25 POINTS WILL MARK BRAINLIEST ANSWER!!!!!
    5·1 answer
  • Why do you think it is important to consider both salary and benefits when applying for a job?
    9·1 answer
  • While on vacation in Rockport, Shawn went out for a dinner that
    15·1 answer
  • Are we finding the area or circumstances?
    8·2 answers
  • Helppppppp and I mark you
    15·1 answer
  • Halppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
    6·2 answers
  • A book sold 42,600 copies in its first month of release. Suppose this represents 9.2% of the number of copies sold to date. How
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!