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
Ede4ka [16]
3 years ago
10

Solve x^2 - x = 2 using the quadratic formula. Show your work.

Mathematics
1 answer:
lesya [120]3 years ago
8 0
The quadratic formula is the result of completing the square for ax^2+bx+c=0 when a,b, and c are unknown values.  This result is:

x=(-b±√(b^2-4ac))/(2a), we have x^2-x-2=0 so

x=(1±√(1+8))/2

x=(1±√9)/2

x=(1±3)/2

x=-1 and 2
You might be interested in
Find the area of the following shape, given its curves are made from parts of circles with diameters indicated on the diagram.
Alexxandr [17]

Answer:

222.51 (when rounded)

Step-by-step explanation:

Pi x r squared is the formula to find the area of a circle

153.94 + 12.57 + 56

= 222.51

You basically find the area of each circle by find their diameters. So half of the length shown on each circle.

7 0
2 years ago
Write and solve a proportion to answer the question. (Skills Review Handbook) 22. 30 is 15% of what number?
algol13

Answer:

The answer is 148.6666667

Step-by-step explanation:

1) Set a linear quation

\frac{22.30}{x}  =  \frac{15}{100}

2) Cross multiply

15x = 22.30 \times 100

3) Multiple the right side

15x = 2230

4) Divide both side by 15

\frac{15x}{15}  =  \frac{2230}{15}

5) Solve the linear equation

x = 148.6666667

3 0
2 years ago
A wheel turns through 200 revolutions per minute. How fast does it turn in radians per second?
lana [24]

Answer:

In one second it turns 200 / 60 = 3 1/3 revolutions. Since one revolution is 360°, the answer is 6 2/3 π radians.

6 0
3 years ago
Read 2 more answers
Is 13.48 irrational or rational? ​
S_A_V [24]

Answer:

It is irrational

Step-by-step explanation:

Rational numbers do not have decimals.

7 0
3 years ago
Read 2 more answers
A carpenter is constructing staircase in a house. The distance from the floor to the basement is 10.8 feet. The staircase will b
konstantin123 [22]

Answer:

\theta = 40.59^\circ

Step-by-step explanation:

Given

The question is illustrated with the attached image

Required

Find \theta

To do this, we use sine formula

i.e.

\sin(\theta) = \frac{Opposite}{Hypotenuse}

So, we have:

\sin(\theta) = \frac{10.8}{16.6}

\sin(\theta) = 0.6506

Take arc sin

\theta = \sin^{-1}(0.6506)

\theta = 40.59^\circ

4 0
3 years ago
Other questions:
  • What is my number? my number is a multiple of 2 and 7. My number is less than 100 but greater than 50. My number is a product of
    14·1 answer
  • What is the difference between 450.2 and 6.957
    12·1 answer
  • Which has the greater area a rectangle that measures 7meters by 9 meters or a square with a side length of 8 meters how do you k
    14·2 answers
  • Find the volume of the cylinder in terms of pi.
    10·1 answer
  • Express angle 37 in radian​
    10·1 answer
  • 9. a = b = c = 12 m.​
    5·1 answer
  • Find the measures of the numbered angles in each rhombus. (PLEASEEEE HELP ME OUT BRO PLEASE ANYONE) DUED BY 10 tonight
    10·1 answer
  • PLEASE HELP ASAP HURRY
    9·2 answers
  • For the given triangle let a = 14.3, b = 16.4, c = 11.7, d = 19.0. Find the perimeter of the triangle.
    10·1 answer
  • Ariana is writing a poem. She writes 30 words on the first line, 30 words on the second line, 30 words on the third line, and 30
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!