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
Alecsey [184]
1 year ago
9

If x2+y2 = 12 and x2-y2=18, what is the value of x4-y4?

Mathematics
1 answer:
nataly862011 [7]1 year ago
6 0

Answer:

Step-by-step explanation: add the equations

2x² = 30

x² = 15

y² = 12 - 15

    = -3

x4 -y4 = 15² - (-3)²

           = 216

You might be interested in
Carrie is buying bulk candy for a high school fundraiser. She buys 1000 candy bars for $350. What is the unit cost per candy bar
Darina [25.2K]
B. $0.35
since to find the unit rate of one candy bar, you have to divide $350 by 1000 and you get $0.35
the rate is 350/1000 = 0.35/1
6 0
3 years ago
Can someone please help me I keep getting the same answer
beks73 [17]

Answer:

  • (5, -20)

Step-by-step explanation:

<u>Given</u>

  • - 6x + y = -50
  • y = -4x

<u>Solution</u>

  • - 6x + (-4x) = -50
  • -10x = -50
  • x = -50/-10
  • x = 5
  • y = -4*5 = -20

5 0
3 years ago
The length of each side of a triangle is increased by 30%. By what percentage is the area increased?
patriot [66]

Answer:

When sides are doubled, the area of new triangle will always be 4 times the original, the change in area will be 3 times. Hence the % change will always be 300% irrespective of the type of triangle.

Step-by-step explanation:


5 0
3 years ago
Find the area of a regular septagon (7 sided regular polygon) with side length 10.
allochka39001 [22]
A≈363.39
Your area is ^^
6 0
3 years ago
What is the square root of 5 divided by the square root of 15 and simplify and in fraction form​
ozzi

Answer:

\sqrt{\frac{1}{3} }

or

\frac{\sqrt{3} }{3}

Step-by-step explanation:

The expression \frac{\sqrt{5} }{\sqrt{15} } can be simplified by first writing the fraction under one single radical instead of two.

\frac{\sqrt{5} }{\sqrt{15} } = \sqrt{\frac{5}{15} }

5/15 simplifies because both share the same factor 5.

It becomes \sqrt{\frac{5}{15} } = \sqrt{\frac{1}{3} }

This can simplify further by breaking apart the radical.

\sqrt{\frac{1}{3} }  = \frac{\sqrt{1} }{\sqrt{3} }  = \frac{1}{\sqrt{3} }

A radical cannot be left in the denominator, so rationalize it by multiplying by √3 to numerator and denominator.

\frac{1}{\sqrt{3} } *\frac{\sqrt{3} }{\sqrt{3} }  =\frac{\sqrt{3} }{3}

4 0
3 years ago
Other questions:
  • how to solve quations using subsitution. The equation I need to solve is 2x+y=5 -3x+2y=17 please explain it in detail thank you
    8·1 answer
  • Four friends are sharing 3 oranges. what fraction of an orange will each friend get?​
    14·2 answers
  • Hellllllpppppp plleaassss
    10·1 answer
  • What is the mean number of hours that high school students spend on homework per week? It is known that the standard deviation o
    6·1 answer
  • Assume the large circle is decreased in size, but it is still larger than the middle circle. Which is true? Answers in the pic
    7·1 answer
  • 120<br> Jos<br> David has saved $9.59. His sister<br> has $3.24 less. How much does<br> she have?
    5·2 answers
  • Write in point-slope form an equation of the line through each pair of points
    15·2 answers
  • I need help ASAP please “f(x)= ?”
    10·1 answer
  • Last year direct marketing had $122,222 in sales. This year direct marketing's sales are down by 9%. What are direct marketings
    7·1 answer
  • How many 3 letter "words" can be formed from the standard 26 letter alphabet, if the first letter must be a vowel (A, E, I, O, o
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!