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3 years ago

Please answer correctly! I will mark you as Brainliest! The pictures go together!

Mathematics

1 answer:

nordsb [41]3 years ago

5 0

21×pi

Step-by-step explanation:

Volume of Cone = 1/3×pi×r^2×h

1/3 × pi × (3)^2 × 7

=65.97 in^3 and in terms of pi, 21pi

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Plz help me find the answer

kap26 [50]

I think 47.1 I followed the formula.

6 0

3 years ago

Read 2 more answers

Need help!

blagie [28]

$\mathcal \pink{GIVEN:}$

Radius = 3 m
Height = 7 m

$\mathcal \purple{TO \: FIND:}$

Volume = ?

$\mathcal \blue{CALCULATION:}$

$\qquad{ \sf \: volume = \pi{r}^{2}h }$

Where,

r is radius
h is height

$\qquad{ \tt\nrightarrow \: \frac{22}{7} \times {3}^{2} \times 7}$

$\qquad{ \tt\nrightarrow \: \frac{22}{ \cancel7} \times {3}^{2} \times \cancel7}$

$\qquad{ \tt\nrightarrow \: 22 \times {3}^{2} }$

$\qquad{ \tt\nrightarrow \: 22 \times 9 }$

$\qquad{ \boxed{ \tt\Rrightarrow \: 198\: {m}^{3} }}$

➪ Henceforth, The volume of the cylinder is 198 m³...

6 0

2 years ago

How do you solve: 18(18)=x(x+15)

ehidna [41]

Hello!

$18(18)=x(x+15)$

The parentheses indicate multiplication; the 18(18) on the left side of the equation is 18 * 18. On the right side of the equation, you have x(x + 15); to simplify this, you would distribute the x--that means multiply each term inside the parentheses by x. This is the Distributive Property: $a(b + c) = ab + ac$ . Let's do that.

$18(18)=x(x+15)$
$324= x^{2} +15x$

Now, you can subtract 324 from each side to set the equation equal to 0.

$324= x^{2} +15x$
$324-324= x^{2} +15x-324$
$0= x^{2} +15x-324$

This is a quadratic equation; to solve it, we may factor (if the equation is able to be factored) or we can use the Quadratic Formula. Let's see if we can factor. To factor, find two numbers whose sum is 15 and whose product is -324. Since 324 is negative, we know one of the numbers is negative and one of the numbers is positive (a negative times a positive is always negative), and that means one of the numbers is greater than 15...

27 - 12 = 15
27 * -12 = -324

The factored polynomial is: (x + 27)(x - 12).

To find its solutions, set the factors equal to 0 and solve for x.

x + 27 = 0
x = -27

x - 12 = 0
x = 12

Answer:
The solution of $18(18)=x(x+15)$ is -27 and 12.

7 0

4 years ago

The graph shows the first 45 minutes of Darlene's bike trip. If she continues at a constant rate, how far will she travel in two

julia-pushkina [17]

the slope or average rate of change for the trip from the graph is just rise/run. Now, let's take a look at those values to get it

$\bf slope\implies \cfrac{rise}{run}\implies \cfrac{distance}{time(mins)}\implies \cfrac{9}{45}=\cfrac{8}{40}=\cfrac{7}{35}=\cfrac{6}{30}=\cfrac{5}{25}\implies \stackrel{\stackrel{slope}{\downarrow }}{\cfrac{1}{5}}$

so the slope of it is 1/5, 2 hours is 120 minutes, what would be the distance value on 120 minutes?

$\bf \cfrac{distance}{time(mins)}=\stackrel{slope}{\cfrac{1}{5}}\qquad \qquad \cfrac{\stackrel{miles}{d}}{\underset{minutes}{120}}=\cfrac{1}{5}\implies d=\cfrac{120}{5}\implies d=24$

4 0

3 years ago

= (4x3 + 7x2 – 2) (2x2 – 3x + 8) how to simplify this?

valentinak56 [21]

Answer:

24 ( 12 -3x)

Step-by-step explanation:

(4x3 + 7x2 – 2) (2x2 – 3x + 8)

(12 + 14 - 2) (4 - 3x + 8)

(26-2) (12 - 3x)

24 (12 -3x)

3 0

3 years ago