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3 years ago

Can anybody please help how to do these!! NO LINKS

Mathematics

1 answer:

Masja [62]3 years ago

3 0

Answer:

22.

$rcos \theta = rsin \theta$

23.

$(rcos \theta) ^{2} + (rsin \theta) ^{2} = 25$

Step-by-step explanation:

To change the equation to polar form replace x with $rcos\theta$

and y with $rsin\theta$

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I need help asap!!!!!

Sladkaya [172]

The surface area of the trash can = 25.12 ft²

Solution:

The given image is splitted into two shapes.

One is Cylinder and the other is hemisphere.

Radius of the cylinder = 2 ÷ 2 = 1 ft

Height of the cylinder = 4 – 1 = 3 ft

Curved surface area of the cylinder = $2\pi rh$

$=2\times 3.14 \times 1 \times 3$

= 18.84 ft²

Curved surface area of the cylinder = 18.84 ft²

Curved surface area of the hemisphere = $2 \pi r^2$

$= 2\times 3.14 \times 1^2$

= 6.28 ft²

Curved surface area of the hemisphere = 6.28 ft²

Surface area of the trash = CSA of cylinder + CSA of hemisphere

= 18.84 ft² + 6.28 ft²

= 25.12 ft²

The surface area of the trash can = 25.12 ft²

6 0

4 years ago

If 2 and 4 are the factors of a number than is 8 always a factor? true or false

kotegsom [21]

Answer:

hmmm I think it's true, if it's not my bad.

4 0

3 years ago

The vertices of figure BCDE have coordinates B(4, 4) , C(−4, 4), D(−4, −4) , and E(4, −4) . The vertices of figure B'C'D'E' have

Fiesta28 [93]

The transformation used was a translation because the numbers changed. Since the x is becoming a smaller number the figure is moving to the left and since the y is getting larger the figure is also moving up. So the answer is: translation, 2 units to the left and 2 units up

4 0

3 years ago

In circle P, diameter QS measures 20 centimeters.

kari74 [83]

check the picture below.

the line QS is just a flat-line and therefore it has 180° on either side, so the angle QPR is 57°, as you see there, and since we know the diameter is 20, that simply means the radius of the circle is 10.

$\bf \textit{arc's length}\\\\ s=\cfrac{\theta \pi r}{180}~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad degrees\\ ------\\ r=10\\ \theta =57 \end{cases}\implies s=\cfrac{(57)(\pi )(10)}{180}\implies s=\cfrac{19\pi }{6}$

6 0

4 years ago

Read 2 more answers

1) y = 2x – 17<br> -3x – y=-13

scoray [572]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}y=2x-17&\text{subtract}\ 2x\ \text{from both sides}\\-3x-y=-13\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}-2x+y=-17\\-3x-y=-13\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad-5x=-30\qquad\text{divide both sides by (-5)}\\.\qquad\boxed{x=6}\\\\\\\text{Substitute the value of x to the first equation}\\\\y=2(6)-17\\y=12-17\\\boxed{y=-5}$

8 0

3 years ago

Can anybody please help how to do these!! NO LINKS​

Can anybody please help how to do these!! NO LINKS