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
NemiM [27]
2 years ago
10

What is the answer to this?? thank u if u help me! :)

Mathematics
1 answer:
solong [7]2 years ago
5 0
I think it’s 3 I’m not sure
You might be interested in
There were 20 boys and 26 girls in a chess club last year. This year the number of boys increased by 30% but the number of girls
Readme [11.4K]

Step-by-step explanation:

Boys

20 + (20 \div 100)30 = \\  = 20 + 0.2 \times 30  =   \\  = 20 + 6 = \\26

Girls

26 - (26 \div 100)15 = \\  = 26 - 0.26 \times 15 =  \\  = 26 - 3.9 = \\  = 22

Total last year 46

Total this year 48

Increase

5 0
2 years ago
What is the percent increase of 40 to 65
Darya [45]

Answer:

percentage increase calculator, formula

Step-by-step explanation:

calculations to find what percent increase from, 40 to 66, 65%

4 0
3 years ago
NEED HELP ASAPPP !! find the y-intercept of the line of the graph.​
Anettt [7]

Answer:

the Y intercept is (0,-2)

Step-by-step explanation:

It is the point on the graph which the line goes through the Y axis

5 0
3 years ago
Alyssa is driving to Chicago, and she is traveling at 60 miles per hour. If Chicago is 96 miles away, how long will it take her
Leviafan [203]

Answer: C

Step-by-step explanation: 1hour 36minutea

8 0
3 years ago
Read 2 more answers
Change each of the following points from rectangular coordinates to spherical coordinates and to cylindrical coordinates.
FromTheMoon [43]

Answer and Step-by-step explanation: Spherical coordinate describes a location of a point in space: one distance (ρ) and two angles (Ф,θ).To transform cartesian coordinates into spherical coordinates:

\rho = \sqrt{x^{2}+y^{2}+z^{2}}

\phi = cos^{-1}\frac{z}{\rho}

For angle θ:

  • If x > 0 and y > 0: \theta = tan^{-1}\frac{y}{x};
  • If x < 0: \theta = \pi + tan^{-1}\frac{y}{x};
  • If x > 0 and y < 0: \theta = 2\pi + tan^{-1}\frac{y}{x};

Calculating:

a) (4,2,-4)

\rho = \sqrt{4^{2}+2^{2}+(-4)^{2}} = 6

\phi = cos^{-1}(\frac{-4}{6})

\phi = cos^{-1}(\frac{-2}{3})

For θ, choose 1st option:

\theta = tan^{-1}(\frac{2}{4})

\theta = tan^{-1}(\frac{1}{2})

b) (0,8,15)

\rho = \sqrt{0^{2}+8^{2}+(15)^{2}} = 17

\phi = cos^{-1}(\frac{15}{17})

\theta = tan^{-1}\frac{y}{x}

The angle θ gives a tangent that doesn't exist. Analysing table of sine, cosine and tangent: θ = \frac{\pi}{2}

c) (√2,1,1)

\rho = \sqrt{(\sqrt{2} )^{2}+1^{2}+1^{2}} = 2

\phi = cos^{-1}(\frac{1}{2})

\phi = \frac{\pi}{3}

\theta = tan^{-1}\frac{1}{\sqrt{2} }

d) (−2√3,−2,3)

\rho = \sqrt{(-2\sqrt{3} )^{2}+(-2)^{2}+3^{2}} = 5

\phi = cos^{-1}(\frac{3}{5})

Since x < 0, use 2nd option:

\theta = \pi + tan^{-1}\frac{1}{\sqrt{3} }

\theta = \pi + \frac{\pi}{6}

\theta = \frac{7\pi}{6}

Cilindrical coordinate describes a 3 dimension space: 2 distances (r and z) and 1 angle (θ). To express cartesian coordinates into cilindrical:

r=\sqrt{x^{2}+y^{2}}

Angle θ is the same as spherical coordinate;

z = z

Calculating:

a) (4,2,-4)

r=\sqrt{4^{2}+2^{2}} = \sqrt{20}

\theta = tan^{-1}\frac{1}{2}

z = -4

b) (0, 8, 15)

r=\sqrt{0^{2}+8^{2}} = 8

\theta = \frac{\pi}{2}

z = 15

c) (√2,1,1)

r=\sqrt{(\sqrt{2} )^{2}+1^{2}} = \sqrt{3}

\theta = \frac{\pi}{3}

z = 1

d) (−2√3,−2,3)

r=\sqrt{(-2\sqrt{3} )^{2}+(-2)^{2}} = 4

\theta = \frac{7\pi}{6}

z = 3

5 0
3 years ago
Other questions:
  • What is the greatest common factor (GCF) of 51 and 68?<br>A. 12<br>B. 3<br>C. 17<br>D. 2
    8·2 answers
  • What is the area of of this tile 6 in and 2 in
    11·2 answers
  • Find an equation of the line with the given slope that passes through the given point. Write the equation in Ax+By=C M=7/5 and t
    8·1 answer
  • A fraction has a denominator that is 4 greater than its numerator. It is equivalent to 9/15. What is the fraction?
    12·2 answers
  • I need answers to these problems
    12·1 answer
  • Which ratio is equivalent to 7:3<br>A. 12:8 <br>B. 49:9<br>C. 28:12<br>D. 21:7
    10·2 answers
  • Someone please help<br> serious answers only!!!!
    7·2 answers
  • 98 POINTS PLEASE HELP! How does the graph of f(x) = (x − 1)^2 relate to the basic function f(x) = x^2?
    8·2 answers
  • -2.7f + 0.8f -14 -5 please help
    14·1 answer
  • Select Proportional or Not Proportional to correctly classify each pair of ratios.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!