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
coldgirl [10]
3 years ago
12

What is the value of the expression 2x2 + 3xy – 4y2 when x = 2 and y = - 4?

Mathematics
1 answer:
Bumek [7]3 years ago
5 0
Please use " ^ " to denote exponentiation:  <span>2x^2 + 3xy – 4y^2

Now let x=2 and y= -4:

2(2)^2 + 3(2)(-4) - 4(-4)^2 = 8 - 24 -4(16) = -16 - 4(16) = -5(16) = -80 (answer)</span>
You might be interested in
I need help with 6,7 pleaaseee
antiseptic1488 [7]
6. addition property of equality (because 7 was added to each side)

7. A function has no repeating x values.....so the one that is not a function WILL HAVE repeating x values......and that would be C because it has repeating 2's
5 0
3 years ago
How do you solve and simplify
DedPeter [7]
F(x) = 1/(x+2)   & g(x) = x/(x-3)


(f(x) + g(x) = 1/(x+2) + x/(x-3). Reduce to same denominator:

1/(x+2) + x/(x-3) =(x-3) + x(x-3)/(x+2).(x-3) ==> (x²+3x-3)/(x+2).(x-3)

7 0
2 years ago
The circumference of a tennis ball is 21<br>cm. How many inches is the circumference?​
Arturiano [62]

Answer:

8.26772

Step-by-step explanation:

1 centimeter is equaled to 0.393701 in inches so multiply it by 21

3 0
3 years ago
Read 2 more answers
Find the midpoint of the segment with given endpoints k(1.7,-7.9) and l(8.5,-8.2)
zhenek [66]
I think it would be 5.2
6 0
3 years ago
HELP HELP PLEASE IM BEGGING YOUUU
Alexandra [31]

Answer:

Area=615.75

Step-by-step explanation:

A=πr2

Seriously I have helped you twice in 5 minutes.

8 0
3 years ago
Other questions:
  • What is the 6th term of the geometric sequence below?
    12·2 answers
  • Find the simple interest earned to the nearest cent for each principal, interest rate, and time. $300, 5%, 2 years
    9·1 answer
  • What is the best type of sampling for a survey?
    10·1 answer
  • Given: AB ≈ DC ; AC ≈ DB
    5·1 answer
  • Please help me guys I need your help
    8·2 answers
  • A landlady rented out her house for 24 cedis for 1 year during the year she paid 15 % of the rent as income tax she also paid 25
    15·1 answer
  • Please help! Write the intervals of the values shown on the graph below
    7·1 answer
  • Use a percent portion to solve the following problem. Omar spends $63 on souvenirs during his vacation. That is 35% of the money
    9·2 answers
  • Here is a right angled triangle work out the value of x using trigonometry
    15·1 answer
  • What is the square root of -1?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!