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1 year ago

Find the next two terms in this sequence. 1, -3, 9, -27, 81, [ ? ],

Mathematics

1 answer:

MatroZZZ [7]1 year ago

8 0

Answer:

-243, 729

Step-by-step explanation:

$f(x) = {( - 3)}^{x}$

x = 0, 1, 2, 3, .....

$f(5) = {( - 3)}^{5} = - 243$

$f(6) = {( - 3)}^{6} = 729$

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Decide whether the equation describes a function.

Harlamova29_29 [7]

Answer: The domain is in the picture

Step-by-step explanation:

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3 years ago

1.8+3.5y+0.9+9=16.2 PLEASE HELP!!

GalinKa [24]

Solution:

$1.8 + 3.5y + 0.9 + 9 = 16.2$

subtracting 0.9 and 9 from both side

$1.8 + 3.5y + 0.9 + 9 - 0.9 - 9 = 16.2 - 0.9 - 9$

it will become

$1.8 + 3.5y = 6.3$

subtracting 1.8 from both side

$1.8 + 3.5y - 1.8 = 6.3 -1.8$

it will become

$3.5y = 4.5$

now dividing both side by 3.5

$\frac{3.5y}{3.5} = \frac{4.5}{3.5}$

$y= \frac{4.5}{3.5}$

which means

$y = 1.28$

Hope it helps!

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3 years ago

I give Braillest! 10 points!!! Write the percent as a decimal. 166% =

inysia [295]

Answer:

1.66

Step-by-step explanation:

When you have a percent, to make it a decimal you have to move the decimal point two places to the left.

3 0

3 years ago

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3 years ago

Find the surface area of the cylinder to the nearest whole number. The figure is not drawn to

Anettt [7]

Answer:

correct option is 2187

Total surface area is 2,185.44 square inches.

lateral surface area is 640.56 square inches

Step-by-step explanation:

Given

radius of cylinder = 12 inches

height of cylinder = 17 inches

we will us value of pi as 3.14

surface area for cylinder consist of two part

1. lateral surface area which is gven by $2\pi rl$

where r is radius of cylinder and l is height of cylinder

Thus, lateral surface area for given cylinder is

$2\pi rl\\ =>2* 3.14*12*17\\=> 1281.12$

Thus, lateral surface area for given cylinder is 1281.12 square inches.

_________________________________

second part of surface area is area of two base (upper and lower) of cylinder.

area of base is given by area of circle $\pi r^2$

$area \ of \base = \pi r^2 = 3.14*12^2\\=>area \ of \base = 3.14*144 = 452.16$

This, area of base is for one base of cylinder

since there are 2 base

area of both base will be = 2* area of one base

= 2*452.16 = 904.32.

Thus, area of base is 904.32 sq. in.

_______________________________________

Total surface area of cylinder = area of two base+ lateral surface area of cylinder = 1281.12 square inches + 904.32 square inches

= 2,185.44 square inches.

Thus, total surface area is 2,185.44 square inches.

lateral surface area is 640.56 square inches

but option which is closest to calculated value is 2187.

Thus, correct option is 2187

___________________________________________

Note: this problem can be directly solved using formula

total surface area for cylinder = $2\pi r^2 + 2\pi rl$

5 0

3 years ago