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3 years ago

61/2×(8/9÷13/18)+(3/4) of 31/5

Mathematics

1 answer:

liberstina [14]3 years ago

8 0

Answer:

$\frac{10969}{260}$

Step-by-step explanation:

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HELP ME PLZZZZ!!!!!!!!!!!!!!!!!!

Alekssandra [29.7K]

the radius of the distance between the middle point of the circle and the outside, we have the diameter which is 6 so the radius will be 3

slant height is

$\sqrt{r^2+h^2}$

h is 4.7 and r is 3

$\sqrt{3^2+4.71^2} \\5.58427$

slant height is 5.58427

lateral surface area

$\pi r\sqrt{h^2+r^2}$

$\pi (3)\sqrt{4.71^2+3^2} \\52.63053$

lateral surface area is 52.63053

total surface area

$\pi r(r+\sqrt{h^2+r^2})$

$\pi 3(3+\sqrt{4.71^2+3^2})$

$80.90486$

total surface area is 80.90486

8 0

3 years ago

ramon ate at a restaurant and gave the server a $4 tip the tip was 20% of the cost of the meal how much was the meal

Tomtit [17]

Answer:

The meal was $20

Step-by-step explanation:

20%= 1/5

1/5=4/? ---> one converts to four by multiplying it by 4 so you should do the the same with the denominator which is five.

5×4= 20

5 0

2 years ago

Simplify square root of (1-cos)(1+cos)/cos^2

Pavel [41]

I hope this helps you

(1-cosx)(1+cosx)=1+cosx-cosx-cos²x=1-cos²x=sin²x

sin²x
____
cos²x

tg²x

3 0

3 years ago

A cuboid with a volume of 924cm^3 has dimensions 4cm, (x+1)cm and (x+11). Show clearly that x^2+12x-220=0 solve the equation by

garik1379 [7]

Answer:

$x^2+12x-220=0$ -- Proved

$x = 10\ \ \ x = -22$

Step-by-step explanation:

Given

$Volume = 924cm^3$

$Dimension: 4cm; (x+1)cm; (x+11)cm$

Required

Show that $x^2+12x-220=0$

The volume is calculated as:

$4 * (x + 1) * (x + 11) = 924$

Open the brackets

$(4x + 4) * (x + 11) = 924$

$4x^2 + 44x + 4x + 44 = 924$

$4x^2 + 48x+ 44 = 924$

Collect Like Terms

$4x^2 + 48x+ 44 - 924=0$

$4x^2 + 48x -880=0$

Divide through by 4

$\frac{4x^2}{4} + \frac{48x}{4} -\frac{880}{4}=0$

$x^2+12x-220=0$

Solving further:

Expand the expression

$x^2 + 22x - 10x - 220 = 0$

Factorize:

$x(x + 22) - 10(x + 22) = 0$

$(x - 10)(x + 22) = 0$

Split:

$x - 10 = 0;\ \ \ x + 22 = 0$

$x = 10\ \ \ x = -22$

5 0

3 years ago

Please help will mark brainly

Serga [27]

Answer:

its c

Step-by-step explanation:

because 6 divided by 2 is three

7 0

3 years ago

Read 2 more answers

61/2×(8/9÷13/18)+(3/4) of 31/5​

61/2×(8/9÷13/18)+(3/4) of 31/5