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
Ymorist [56]
3 years ago
12

Please answer this! It confuses me. 20 points for it.

Mathematics
2 answers:
Norma-Jean [14]3 years ago
7 0
X + 1 = 3
x + 1 - 1 = 3 - 1
x = 2


x + 1 = -3
x + 1 - 1 = -3 -1
x = -4

Answer: x = 2 or x = -4
KATRIN_1 [288]3 years ago
3 0
Since x is in an absolute value equation, it means it could be negative or positive. In order to get three from adding to 1, 2 is one, but because of the absolute value, if you make x -4 then it would be -3 but the absolut value would make it 3. Your answer is both -4 and 2

You might be interested in
Janelle wants to learn to play the piano. Her friends recommended three different music schools. Make Music charges $525 for 10
gulaghasi [49]
Music World give the best deal
5 0
1 year ago
Express the equation in rectangular form<br> a) r = 2sin(2Θ)<br> b) r = 4cos(3Θ)
Dafna11 [192]

Answer:

a.  sqrt(x^2+y^2) * (x^2+y^2) = 4xy

b.  (x^2+y^2)^2 = 4x{ (x^2 - 3 y^2}

Step-by-step explanation:

a) r = 2sin(2Θ)

r* = 2 sin 2 theta

We know  sin 2theta = 2 sin theta cos theta

r = 2 * 2 sin theta cos theta

sin theta = y/r  and cos theta = x/r

r = 4 y/r * x/r

r = 4xy / r^2

Multiply each side by r^2

r^3 = 4xy

r * r^2 = 4xy

We know r = sqrt(x^2+y^2)  and r^2 = (x^2+y^2)

sqrt(x^2+y^2) * (x^2+y^2) = 4xy

b) r = 4cos(3Θ)

we know that cos 3 theta = cos^3(theta) - 3 sin^2(theta) cos(theta)

r = 4 *cos^3(theta) - 3 sin^2(theta) cos(theta)

Factor out a cos theta

r = 4 *cos(theta){ cos^2 (theta) - 3 sin^2(theta) }

We know that  sin theta = y/r  and cos theta = x/r

r = 4 (x/r) { (x/r)^2 - 3 (y/r)^2}

r = 4 *(x/r) { (x^2/r^2 - 3 y^2/r^2}

Multiply by r

r^2 = 4x { (x^2/r^2 - 3 y^2/r^2}

Multiply by r^2

r^2 *r^2 = 4x { (x^2 - 3 y^2}

r^4 = 4x{ (x^2 - 3 y^2}

We know  r^2 = (x^2+y^2)

(x^2+y^2)^2 = 4x{ (x^2 - 3 y^2}

5 0
3 years ago
Oliver had $50 on the day before his birthday. After he recived some money for his birthday , he had $75. Write and solve eqauti
Doss [256]

Answer:

X=25

Step-by-step explanation: 25+50=75


3 0
3 years ago
The length of an edge of a cube is 5 inches. What is the volume of the cube? Enter your answer in the box.
adelina 88 [10]

Answer:

125 cubed inches

Step-by-step explanation:

The length of the sides of a cube are all the same, since it’s just a 3D square. The formula for volume is length times width times height.

5*5*5=125

8 0
3 years ago
Help! how do you do q2?
sineoko [7]
Negative is infinite
positive is dependent on whether or not a can = b etc.
4 0
2 years ago
Other questions:
  • Please solve this math question
    6·2 answers
  • I néed to know wich of thé staments are true
    8·2 answers
  • Can someone help me please??? Four questions!
    7·1 answer
  • I really need help with this. Extra points for answer. Please help ASAP!
    7·1 answer
  • Last year, the average American used 167 disposable water bottles (16.9 oz or 0.132 gallons). If the cost of 1 gallon of tap wat
    11·1 answer
  • The entire stock of backpacks at hats and packs is on sale for 30% off Marybeth purchase a backpack that regularly cost $25 her
    13·1 answer
  • Jane used a total of 7 1/4 gallons of gas while driving her car. Each hour she was driving, she used 5/6 gallons of gas. What wa
    5·1 answer
  • You might need: Calculator
    11·1 answer
  • An object has a potential energy of 14 J and a mass of 17 kg , how far above the ground is the object? An object moving with a s
    12·1 answer
  • Identify the vertex of the parabola and tell whether it is a minimum or a maximum.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!