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3 years ago

I need to know the answers

Mathematics

2 answers:

arsen [322]3 years ago

8 0

For answers 17-30 all you need to do is determine the quadrant the points are in. The points are in order of (x,y) , “x” is the horizontal line and “y” is the vertical. (I’m sure you know that) if you don’t know , to the left of (0,0) (where x and y intersect) , all x values are negative, and to the right they are all positive. For “y” the values on top of (0,0) are positive and below (0,0) are negative. So for example, for number 17. (-5,2) the point will be in the top left quadrant because that’s where x is negative (-5) and y is positive (2). Not sure if that’s what you are looking for, you may know all this already but from your question that’s what I assumed you needed help with. Hope this helps! If not sorry.

kkurt [141]3 years ago

7 0

Answer:

for which problems if it is all the ones you haven't done yet then say that.

Step-by-step explanation:

i dont know how to gragh pionts on this thing plz tell me how

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which set does square 7 belong to? integers and irrational numbers irrational and real numbers real and rational numbers rationa

pashok25 [27]

Answer:This number belongs to a set of numbers that mathematicians call rational numbers. Rational numbers are numbers that can be written as a ratio of two integers. ... square root of a number that is not a perfect square, for example , is irrational. ... The set of real numbers is all the numbers that have a location on the number ...

Step-by-step explanation:

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3 years ago

I need help writing an expression

zepelin [54]

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3 years ago

Solve the system of equations - 6x + 5y = 0 and -5x + 5y = -5 by combining

Anna [14]

9514 1404 393

Answer:

(x, y) = (-5, -6)

Step-by-step explanation:

The coefficients of y are the same, so we can eliminate y by subtracting one equation from the other. Here, we choose to subtract the first from the second, so that the coefficient of x ends up positive.

(-5x +5y) -(-6x +5y) = (-5) -(0)

x = -5 . . . . . . simplify

-6(-5) +5y = 0 . . . . . . substitute x into the first equation

6 +y = 0 . . . . . . . . . . divide by 5

y = -6 . . . . . . subtract 6

The solution to the system of equations is (x, y) = (-5, -6).

7 0

3 years ago

A Ferris wheel has a diameter of 380 feet and the center of the wheel is 195 feet above the ground. The wheel makes a complete t

Aleksandr [31]

Answer:

y = -190 cos(π t / 120) + 195

Step-by-step explanation:

General form of a sinusoidal function: y = A cos(Bt - C) + D

Now generally a cosine function starts at the maximum value, so to start at the minimum value, flip the cosine function by making it negative.

A is the amplitude of the curve and will be the radius of the ferris wheel. Therefore, A = 380 / 2 = 190 feet.

2π / B is the period of the curve and will be the time to complete one full rotation. The time to complete one full rotation is given as 4 minutes. Convert this into seconds to get period = 4 minutes * (60 seconds / minute) = 240 seconds. Therefore, B = 2π / period = 2π / 240 seconds = π / 120.

C/B is the phase shift, or horizontal shift of the graph. Since the negative cosine function already starts at the minimum value, there is no phase shift so C/B = 0, meaning C = 0.

D is the vertical shift and will be the height of the center of the ferris wheel. Therefore, D = 195 feet.

Your final function will be:

y = -190 cos(π t / 120) + 195

7 0

3 years ago

Find the volume of a right circular cone that has a height of 2.7 ft and a base with a diameter of 14.4 ft. Round your answer to

irina1246 [14]

Answer:

V≈146.57ft^3

Step-by-step explanation:

V=πr^2·h/3 since d is 14.4, we would divide it by 2 to find the radius which is 7.2

so V= π(7.2)^2· (2.7)/3

V≈146.57ft^3

It would be greatly appreciated if you gave me the brainlest

3 0

3 years ago