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
Vedmedyk [2.9K]
3 years ago
15

If 3x^2+3y^2=42 and xy =-15.Find the value (x-y)^2

Mathematics
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

44

Step-by-step explanation:

Given, 3x^2 + 3y^2 = 42

=>3(x^2 + y^2) = 42 =>x^2 + y^2 = 42/3= 14

Thus,

= (x - y)^2

= x^2 + y^2 - 2xy

= (x^2 + y^2) - 2xy

= 14 - 2(-15)

= 14 + 30

= 44

You might be interested in
Beth is purchasing chocolate and vanilla ice cream cups for a birthday party. She needs a total of 24 ice cream cups and twice a
frez [133]
constraint 1
 let
 x = number of cups of chocolate
 y = number of cups of vanilla
 The equation that represents the total number of ice cream is:
 x + y = 24
 constraint 2
 the ratio of the number of chocolate cups to vanilla cups is
 y = (1/2) x
 Using equations 1 and 2, you can find the number of cups of each favor required.
 answer:
 x + y = 24
 y = (1/2) x
6 0
3 years ago
Solve the proportion. 8/3 = g/3
Semmy [17]
Expression: 8/3 = g/3

Denominators are same, so cancel them from each other.

g = 8

In short, Your Answer would be: 8

Hope this helps!
5 0
3 years ago
Problem Ari thinks the perfect milkshake has 333 ounces of caramel for every 555 scoops of ice cream. Freeze Zone makes batches
Diano4ka-milaya [45]

Answer:

That their milkshakes need more caramel or less ice cream.

Step-by-step explanation:

We can see that Ari's numbers for a perfect milkshake gives us a caramel to ice cream ratio of 333 / 555 = 0,6.

But the Freeze Zone uses a caramel to ice cream ratio of 666 / 888 which is equal to 0,75.

Their milkshakes have less caramel and more ice cream than Ari's perfect milkshake so Ari will think that Freeze Zone's milkshakes are not sweet enough.

I hope this answer helps.

8 0
3 years ago
10
FromTheMoon [43]

The total amount shared by the friends illustrates mean and average, and the amount spent by each friend is $11.5

<h3>How to determine the amount?</h3>

The given parameters are:

  • Total = $76
  • Tip = $16
  • Number of friends = 8

The amount spent by each friend is calculated using:

Amount = (Total + Tip)/Number of friends

So, we  have:

Amount = (76 + 16)/8

Evaluate

Amount = 11.5

Hence, the amount spent by each friend is $11.5

Read more about mean and average at:

brainly.com/question/20118982

#SPJ1

8 0
2 years ago
Simplify −2xy + 3x − 2xy + 3x <br><br> A. 4xy +6x B. 2xy C. −4xy + 6x D. 4xy − 6x
marysya [2.9K]
First you must combine like terms, the two terms I this expression are x, and xy. So by adding -2xy to -2xy you get -4xy. Next you must add 3x to 3x. This gives you the simplified expression -4xy+6x. Hope this helps
4 0
3 years ago
Read 2 more answers
Other questions:
  • 13.If triangle ABC IS CONGRUENT TO TRIANGLE ADC , which is true by CPCTC?
    10·1 answer
  • I need help asap send in answers please idk what this is
    5·1 answer
  • Which is equal to x^3-8
    9·1 answer
  • Please help so I cna graduate !
    14·1 answer
  • Plot the point (2, 2)
    15·2 answers
  • What is the difference of the mass of the plants from week 1 to week 2?
    14·1 answer
  • If the figure is translated 4 units and 2 units down what are the coordines
    8·1 answer
  • (-1)x2x3 <br> Please answerrrrrrr
    7·2 answers
  • 2x – бу = 12<br> -5x - 15 = -30
    14·1 answer
  • A baseball team played 75 games and lost 20% of them. How many games did the team lose?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!