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
Vladimir79 [104]
3 years ago
10

Please help, I'll mark Brainiest. It's 8th grade math

Mathematics
2 answers:
yawa3891 [41]3 years ago
7 0

Answer:

(-5, 2)

Step-by-step explanation:

<u>plug x into the equation x - 5y = -15</u>

-5 - 5y = -15

add 5 to both sides: -5y = -10

divide by -5: y = 2

svetlana [45]3 years ago
7 0

Correct Answer:

(5, 4)

You might be interested in
What does this mean 3^4
nirvana33 [79]
3^4 means 3 to the 4th power.
This means that you would multiply 3 by itself 4 times
It would look like this...3*3*3*3
3^4=81
4 0
2 years ago
Read 2 more answers
A skateboarding club randomly surveyed 200 people who visited the club's website about their favorite skateboard brand. The data
denis-greek [22]

Answer: 36/200 = 18/100 = 18%

Step-by-step explanation:

5 0
3 years ago
Find the real numbers x and y if -3+ix^2y and x^2+y+4i are conjugate of each other. Pls solve with the steps
Firdavs [7]
ANSWER
x = ±1 and y = -4.
Either x = +1 or x = -1 will work

EXPLANATION
If -3 + ix²y and x² + y + 4i are complex conjugates, then one of them can be written in the form a + bi and the other in the form a - bi. In other words, between conjugates, the imaginary parts are same in absolute value but different in sign (b and -b). The real parts are the same

For -3 + ix²y
⇒ real part: -3
⇒ imaginary part: x²y

For x² + y + 4i
⇒ real part: x² + y (since x, y are real numbers)
⇒ imaginary part: 4

Therefore, for the two expressions to be conjugates, we must satisfy the two conditions. 

Condition 1: Imaginary parts are same in absolute value but different in sign. We can set the imaginary part of -3 + ix²y to be the negative imaginary part of x² + y + 4i so that the 

   x²y = -4 ... (I)

Condition 2: Real parts are the same

   x² + y = -3 ... (II)

We have a system of equations since both conditions must be satisfied

   x²y = -4 ... (I)
   x² + y = -3 ... (II)

We can rearrange equation (II) so that we have

   y = -3 - x² ... (II)

Substituting into equation (I)

   x²y = -4 ... (I)
   x²(-3 - x²) = -4
   -3x² - x⁴ = -4
   x⁴ + 3x² - 4 = 0
   (x² + 4)(x² - 1) = 0
   (x² + 4)(x-1)(x+1) = 0

Therefore, x = ±1.
Leave alone (x² + 4) as it gives no real solutions.

Solve for y:

   y = -3 - x² ... (II)
   y = -3 - (±1)²
   y = -3 - 1
   y = -4

So x = ±1 and y = -4. We can confirm this results in conjugates by substituting into the expressions:

   -3 + ix²y 
   = -3 + i(±1)²(-4)
   = -3 - 4i

   x² + y + 4i
   = (±1)² - 4 + 4i
   = 1 - 4 + 4i
   = -3 + 4i

They result in conjugates
4 0
3 years ago
Read 2 more answers
What is the y-intercept of a line that has a slope of 1 over 4 and passes through point (8, 3)? 1 3 5 11
Sindrei [870]

Sorry, my answer was wrong. I can't delete it so as not confuse anybody i changed it to this.

4 0
3 years ago
Read 2 more answers
An 8 oz box of cocoa puffs costs $1.59 and a 2-pound box costs $6.79. which box is a better buy
VikaD [51]

Answer: 8 oz..

1 pound= 16oz if 8oz=1.59 so add it up 4 times 8+8+8+8= 32 which = 2 pounds total 8=1.59 8+8= 1.59x2=3.18 8+8+8=1.59x3=4.77 8+8+8+8/ 1.59x4= 6.36 so all of them eights will = up to 2 pounds and 8 is obviously less

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • So then which one is the answer??
    6·1 answer
  • If you have seven classes take 3 test a week what’s the probability of you passing all of your test
    14·1 answer
  • The exponent on variable z is _____
    12·1 answer
  • PLEASE HELP ILL GIVE BRAINLIEST
    5·1 answer
  • Gustavo is the league’s home run leader. The probabilities for his total number of home runs for the season are follows:
    6·2 answers
  • What is the volume of this cube?<br><br> Enter your answer as a decimal in the box
    5·2 answers
  • Solve each system by graphing.
    7·2 answers
  • Find the surface area of the triangular prism below.
    12·2 answers
  • Product of two numbers is 13832 one of the number is 76 find the difference between two numbers​
    12·1 answer
  • David ha fabricado una caja de cartón sin tapa para guardar sus cromos la caja tiene una base cuadrada cuyos lados miden 30 cm y
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!