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
grin007 [14]
3 years ago
14

4x²-y²=171 and 2x-y=9, value of 2x+y

Mathematics
1 answer:
11111nata11111 [884]3 years ago
8 0
So you will need to solve for x and y before evaluating 2x+y....

2x-y=9, y=2x-9  now this will make 4x^2-y^2=171 become:

4x^2-(2x-9)^2=171

4x^2-(4x^2-36x+81)=171

36x-81=171

36x=252

x=7, now we can use 2x-y=9 to solve for y...

2(7)-y=9

14-y=9

-y=-5

y=5

now we know that x=7 and y=5, 2x+y becomes:

2(7)+5

14+5

19
You might be interested in
Select the scenario that correctly represents the given graph.
Mashcka [7]

Answer:

C. The vertical distance of a roller coaster from the ground changes with respect to its horizontal distance from the beginning of the ride.

Step-by-step explanation:

See how the graph is in a "U" shape? That tells us that it first decreases and then goes back up at some point.

The way you would find this answer is to go through each scenario (A, B, C, and D) and think about which thing would make sense to go down and then up.

5 0
3 years ago
A shelter has enough food to feed an average of 80 hungry people a day for 14 days. If an average of 32 people are at the shelte
egoroff_w [7]

Multiply 80 by 14 to get how many total people they can feed.

80 times 14 is 1120.

Now, divide 1120 by 32 to get how many days the food will last if 32 people come every day.

1120/32 = 35.

The answer is B, 35 days

4 0
3 years ago
Read 2 more answers
PLEASE HELP!!!! WILL MARK BRAINLIEST IF CORRECT!!!!!!
PilotLPTM [1.2K]
-2 would be your answer
7 0
3 years ago
Write a rule to describe the transformation.
Angelina_Jolie [31]

Step-by-step explanation:

The function translation / transformation rules: f (x) + b shifts the function b units upward. f (x) − b shifts the function b units downward. f (x + b) shifts the function b units to the left

4 0
2 years ago
Which viewing window boundaries would allow you to see all the intercepts and the maximum, as closely as possible, for the funct
skelet666 [1.2K]

Answer:

-4

7

-1

23

Step-by-step explanation:

I did the assignment on Edgenuity.

8 0
3 years ago
Read 2 more answers
Other questions:
  • Sin 31 / 2 cos 59<br>evatuate with out using table​
    7·1 answer
  • Convert 6\5 into a mixed number
    11·1 answer
  • The day length in Manila, Philippines, varies over time in a periodic way that can be modeled by a trigonometric function.
    14·1 answer
  • PRACTISE NOW 11
    8·1 answer
  • What is 3 1/3 as a percentage and a decimal? Thank you!!
    13·1 answer
  • The sum of the first two and the greatest of 4 consecutive odd integers is 29. What are the integers?
    11·1 answer
  • Solve for x<br> B<br> 40°<br> 3x+10<br> A<br> С<br> Type your answer...
    14·1 answer
  • Solve each proportion 3/39= y/13
    12·2 answers
  • -8 &lt; x/4 <br> I need the answer ASAP
    10·1 answer
  • Vani bought snacks for her team's practice. She bought a bag of popcorn for $3.39
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!