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
mafiozo [28]
3 years ago
15

3

Mathematics
1 answer:
Elanso [62]3 years ago
6 0

Answer:

Step-by-step explanation:

You might be interested in
X^2+4x+20=12x-5<br><br> Solve this equation
Scrat [10]

Answer:

4 + (or -) 3i

Step-by-step explanation:

Hi!

Alright, so we're going to move all of the variables and constants to one side. Then, using the quadratic formula, we'll find the answer.

1. Move 12x-5 to the left side of the equation by

  a. Subtracting 12x from both sides

  b. adding 5 to both sides.

1: x^2+4x+20-12x+5

2. Group the common terms

  x^2+4x-12x+20+5 --> x^2-8x+25

3. Look at the problem. We can't factor this.

Explanation for why this isn't factorable (you can skip this)

(1) 25 is positive, so its two factors will both be either positive or negative. We're looking for a negative 8, so let's go with negative.

(2) Factors of 25: 1 & 25, 5 &5

Seeing the problem? Ya, none of the factors of 25 sum to eight. So, instead, we're going to use the quadratic formula.

4.  So, the quadratic formula: \frac{-b+-\sqrt{b^2-4ac} }{2a}

Our equation is x^2-8x+25=0

a is the constant in front of the x^2

b is the constant in front of the x

c is the term without any x values

so, a=1, b=-8, and c= 25

Into equation:

\frac{8+-\sqrt{64-4(1)(25)} }{2a}=\frac{8+-\sqrt{64-100} }{2}=\frac{8+-\sqrt{-36} }{2}

8/2 = 4

sqrt(-36) = 6i

6i/2 = 3i (remember, we still have the two in the denominator)

4 + (or -) 3i

8 0
3 years ago
Read 2 more answers
The radius of a circle is 18 yards. What is the circle's area?<br> Use 3.14 for ​.
IrinaVladis [17]

Solution:

<u>We know that:</u>

  • Radius: 18 yards
  • πr² = Area of circle
  • π = 3.14

<u>Finding the area of the circle:</u>

  • (π)(r²) = Area of circle
  • => (3.14)(18²) = Area of circle
  • => (3.14)(324) = Area of circle
  • => Area of circle = 3.14 x 324 = 1017.36 yards²
3 0
2 years ago
Read 2 more answers
Directions: Evaluate the following combinations and determine the value of the
Andru [333]

Answer:

1. C(9,4) : n=9, s=4

2. C(10,5) : r=5

3. C(5,5) : n=5

4. C(7,7) : n=6

5. C(18,17) : r=3

Step-by-step explanation:

4 0
3 years ago
How many cubic centimeters of water can this paper cone cup hold?
weeeeeb [17]

Im probably wrong but 48π cubic centimeters

4 0
3 years ago
Quadrilateral ABCD is inscribed in circle O.
creativ13 [48]

Opposite angle of a quadrilateral add up to 180 degrees.

This means Angle A plus Angle C equal 180.

We can solve for X using that, then solve for Angle B.

2x-7 + x +4 = 180

Simplify:

3x -3 = 180

Add 3 to each side:

3x = 183

Divide both sides by 3:

x = 183 /3

x = 61

Now we know x, replace x with 61 in the equation for Angle B:

Angle B = 2x+3 = 2(61) +3 = 122 +3 = 125 degrees.

7 0
3 years ago
Read 2 more answers
Other questions:
  • Choose the function whose graph is given by:
    11·2 answers
  • Two angles in a triangle add up to 115° what is the size of the third angle
    5·2 answers
  • Is 99 divisible by 6
    13·2 answers
  • Given the function y = -2ex , find y if x = 3.
    11·1 answer
  • You are conducting an experiment to determine whether males and females have different emotional reactions to chocolate consumpt
    6·1 answer
  • Y = 1/2x + 2<br> What is the slope?
    8·2 answers
  • What is the exact value of tan ( 5 pi/8 )
    13·1 answer
  • • The first customer paid $12 for 14 postcards and 5 large envelopes.
    8·1 answer
  • Use the diagram to determine which is the correct net of the given figure. Then, explain why the other nets are not correct--exp
    5·1 answer
  • (SAT Prep) If two sides of a triangle measure 2 and 6, then which of the following cannot be the length of the third side?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!