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Alex17521 [72]
3 years ago
8

Had to do it to em

Mathematics
2 answers:
ohaa [14]3 years ago
6 0

Answer:

A is the correct answer

Step-by-step explanation:

When x =4 and y =-5, and you want to evaluate equation -3x+2y, you just have to apply it into the equation.

We got the equation as:

= -3x + 2y

= -3*4 + 2*(-5)

= -12 + (-10)

= -12 - 10

= -22

Hope this help you :3

oksian1 [2.3K]3 years ago
6 0

Answer:

Step-by-step explanation:

First you plug in the numbers 4 into x and -5 into y.

-3(4) + 2(-5)

-3(4) is -12, 2(-5) is -10

-12 - 10

the answer is a) -22

Hope this helped ! ;)

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Tanya [424]

Answer:

A

Step-by-step explanation:

8 0
3 years ago
A Ferris wheel has a radius of 10 m, and the bottom of the wheel passes 1 m above the ground. If the Ferris wheel makes one comp
Morgarella [4.7K]

Answer:

y = 11 - 10cos(0.1\pi t)

Step-by-step explanation:

Suppose at t = 0 the person is 1m above the ground and going up

Knowing that the wheel completes 1 revolution every 20s and 1 revolution = 2π rad in angle, we can calculate the angular speed

2π / 20 = 0.1π rad/s

The height above ground would be the sum of the vertical distance from the ground to the bottom of the wheel and the vertical distance from the bottom of the wheel to the person, which is the wheel radius subtracted by the vertical distance of the person to the center of the wheel.

y = h_g + d_b = h_g + R - d_c (1)

where h_g = 1 is vertical distance from the ground to the bottom of the wheel, d_b is the vertical distance from the bottom of the wheel to the person, R = 10 is the wheel radius, d_c is the vertical distance of the person to the center of the wheel.

So solve for d_c in term of t, we just need to find the cosine of angle θ it has swept after time t and multiply it with R

d_c = Rcos(\theta(t)) = Rcos(\omega t) = 10cos(0.1\pi t)

Note that d_c is negative when angle θ gets between π/2 (90 degrees) and 3π/2 (270 degrees) but that is expected since it would mean adding the vertical distance to the wheel radius.

Therefore, if we plug this into equation (1) then

y = h_g + R - d_c = 1 + 10 - 10cos(0.1\pi t) = 11 - 10cos(0.1\pi t)

7 0
3 years ago
⚠️PIC INCLUDED⚠️ I MARK BRAINLIST PLEASE HELP I AM BEING TIMED The table represents an exponential function.
Rus_ich [418]

Answer:

We know that that x represents (1)

2/5 is the answer because if you add, multiply them together you will get 2/5=40/100%

Hope this helps

Mark As Brainllest

7 0
3 years ago
Need help don’t understand
seraphim [82]
1. 2x and 6y Because
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3 years ago
Linear Equations In Any Form. Help ASAP Please
Ronch [10]

The answer is y = 3/4 x + 2



<em>Explanation:</em>


Basically, the formula for a linear equation is y = mx + b

b = y-intercept

mx = slope


slope = rise/ run (pos.)

it can also be fall/ crawl (neg.)


In the graph the line meets at the y-int. at 2, the line rises 3 and goes right 4 each time.

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