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3 years ago

Maths quiz answer with logic ok? ok? ok

Mathematics

1 answer:

tamaranim1 [39]3 years ago

3 0

Answer:

nepal = 11

Step-by-step explanation:

english = 4

Pakistan = 9

Australia =25

9×4 =36-25 =11

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Freddie is at chess practice waiting on his opponent's next move. He notices that the 4-inch-long minute hand is rotating around

ale4655 [162]

Answer:

Part 1: $\frac{2\pi}{3}$ radians

Part 2: The minute hand travels $\frac{8\pi}{3}$ inches.

Part 3: The minute hand travels $\frac{3\pi}{4}$ radians.

Part 4: The coordinate point is $(-\frac{\sqrt{2}}{2},\frac{\sqrt{2}}{2})$

Step-by-step explanation:

Part 1:

There are 60 minutes in an hour. 1 hour is 1 revolution (1 circle), which is 360°.

So each minute represents $\frac{360}{60}=6$ degrees

From 3:35 to 3:55 is 20 minutes. Hence, 20 minutes is $6*20=120$ degrees.

To convert from degrees to radians, we multiply the degrees by $\frac{\pi}{180}$

120° is equal to $120*\frac{\pi}{180}=\frac{2\pi}{3}$ radians

Part 2:

We want to find the "arc length" of this.

Formula for arc length is $s=r\theta$

Where,

s is the arc length
r is the radius (here the minute hand was given as 4 inches)
$\theta$ is the angle in radians (we found it to be $\frac{2\pi}{3}$ )

So, $s=r\theta\\s=(4)(\frac{2\pi }{3})=\frac{8\pi}{3}$

The minute hand travels $\frac{8\pi}{3}$ inches.

Part 3:

Here we use the arc length formula where we want to find $\theta$ given that $s=3\pi$ and radius is 4 inches. So we have:

$s=r\theta\\3\pi=(4)(\theta)\\\theta=\frac{3\pi}{4}$

The minute hand travels $\frac{3\pi}{4}$ radians.

Part 4:

The coordinate point associated with a specif radian is given by the formula:

$(x,y)=(cos(\theta)sin(\theta))\\(x,y)=(cos(\frac{3\pi}{4})sin(\frac{3\pi}{4}))\\(x,y)=(-\frac{\sqrt{2}}{2},\frac{\sqrt{2}}{2})$

Thus the coordinate point is $(-\frac{\sqrt{2}}{2},\frac{\sqrt{2}}{2})$

3 0

4 years ago

Read 2 more answers

Create a matrix. use a graphing calculator to solve the system using the rref function.

zloy xaker [14]

Answer:

$x=-\dfrac{44}{7}$

$y=\dfrac{58}{7}$

Step-by-step explanation:

Arrange the equations so that all the variables are in columns (x as the first column, y as the second, equals a number as the third):

-11x - 4y = 36

5x + 5y = -10

Define and edit Matrix A. We need a 3 x 2 matrix. Input the coefficients and constant:

$\left[\begin{array}{ccc}-11&-4&36\\5&5&-10\end{array}\right]$

Find rref function, enter matrix A: rref([A]) (press enter)

This gives you:

$\left[\begin{array}{ccc}1&0&-\frac{44}{7}\\0&1&\frac{58}{7}\end{array}\right]$

which means:

$x=-\dfrac{44}{7}$

$y=\dfrac{58}{7}$

8 0

2 years ago

Colin earned 46 raking leaves if he worked 1.5 hours yesterday and 4.25 hours today how much did he earn per hour

KonstantinChe [14]

1.5 + 4.25 = 5.75 total hours worked

46/5.75= 8

4 0

4 years ago

Just question 6 i keep getting the same answer that is wrong

Kipish [7]

What is the question????????????????????????????????????????????

3 0

4 years ago

Y=-x-5 graph this equation

sergejj [24]

Negative slope and shifted 5 down on the y axis with a root at x=-5

5 0

3 years ago

Maths quiz answer with logic ok? ok? ok​

Maths quiz answer with logic ok? ok? ok