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4 years ago

What is the appropriate volume of a cylinder that has a redius of 4cm and the height of 9cm using 3.14 π

Mathematics

1 answer:

Firdavs [7]4 years ago

6 0

Answer:

50.265

Step-by-step explanation:

Sorry if its wrong

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X^2 + y^2 = 13,

Marysya12 [62]

Answer:

A, B, C and D. are solutions.

Step-by-step explanation:

x^2 + y^2 = 13

x^2 - y^2 = 5

Check which roots fit the original equations:

If x = 3, A gives

9 + y^2 = 13 giving y = +/- √4 = 2 or -2.

Now plug in x = 3 and y = 2 in the second equation:

9 - (2)^2 = 5

Therefore (3,2) is a solution of the 2 equations.

Following the same procedure for B, C and D:

B. Substituting x = 3 and x = -2 fits both equations so (3, -2) is a solution.

The same is true for C and D.

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3 years ago

Find the value of x and y

tankabanditka [31]

Answer:

x = 3, y = 10.

Step-by-step explanation:

The 2 triangles are similar so the corresponding sides are in the same ratio.

x/6 = 4/8

x/6 = 1/2

x = 6/2 = 3.

y/5 = 8/4 = 2

y = 5*2 = 10,

8 0

3 years ago

Read 2 more answers

Log5 (x squared - 9) = 0

andreev551 [17]

Answer:

$x=3,\:x=-3$

Step-by-step explanation:

Given the equation

$\log _{10}\left(5\right)\left(x^2-9\right)=0$

Divide both sides by $\log _{10}\left(5\right)$

$\frac{\log _{10}\left(5\right)\left(x^2-9\right)}{\log _{10}\left(5\right)}=\frac{0}{\log _{10}\left(5\right)}$

Simplify

$x^2-9=0$

Add 9 to both sides

$x^2-9+9=0+9$

Simplifying

$x^2=9$

$\mathrm{For\:}x^2=f\left(a\right)\mathrm{\:the\:solutions\:are\:}x=\sqrt{f\left(a\right)},\:\:-\sqrt{f\left(a\right)}$

$x=\sqrt{9},\:x=-\sqrt{9}$

$\sqrt{9}\:=3$

$-\sqrt{9}=-3$

Therefore,

$x=3,\:x=-3$

3 0

3 years ago

Help please 21/r = 15/14

Verizon [17]

Answer:

19.6 Don't ask how just give brainliest

7 0

3 years ago

Read 2 more answers

I need help I have searched everywhere and nothing

Marta_Voda [28]

Answer:

See attached

Step-by-step explanation:

All answers in one graph, refer to attached

The function we need is

C(x) = 100(2*5280 - x) + 180 $\sqrt{800 +x^2}$ , where 2*5280= 2 miles

Table included as well

The vertex is about x = 19 ft which corresponds the minimum cost

Any other value, including negative reveal greater cost

Note. there is a bit confusion over 2 miles or 2000 ft, but the graph is going to be same in shape and vertex for x, the value for cost will be different

3 0

4 years ago