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3 years ago

Select the 2 expressions that would be equivalent to the following:

Mathematics

1 answer:

evablogger [386]3 years ago

3 0

Answer:

D. -2(x + 7)

Step-by-step explanation:

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WILL GIVE BRAINLIEST! A ball rolling down an inclined plane travels, in successive seconds, k feet, 2.5k feet, 4k feet, etc… . F

SVETLANKA909090 [29]

Answer:

Step-by-step explanation:

this is an arithmetic series

and to find out the 9th term

1 second ....................... k feet

2 second...........................2.5 feet

3 sec.....................................4 feet

4 sec....................................5.5 feet

difference 1.5

5 sec................................7 feet

6 sec................................8.5

7 sec.................................10 ft

9second .............................................13 ft

6 0

2 years ago

Difference of two whole numbers is 33 and its ratio is 2:5 then find those<br> numbers.

S_A_V [24]

Answer:

Step-by-step explanation:

Let the two whole numbers be 5x and 2x then

by the question

5x - 2x = 33

3x = 33

x = 33/3

x = 11

Therefore the numbers are

5x = 5*11 = 55
2x = 2*11 = 22

hope it helps:)

8 0

2 years ago

What is the equation of a line that passes through the points (3, 6) and (8, 4) in slope intercept form?

MrMuchimi

Answer:

$y=-\frac{2}{5}x +8.4$

Step-by-step explanation:

Gradient

$m =\frac{y-y1}{x-x1}$

$m = \frac{6-4}{3-8}$

$m=-\frac{2}{5}$

Equation of a line

$(y-y1)=m(x-x1)\\$

- Sub one set of points into equation

$(y-6)= -\frac{2}{5} (x-6)$

$y=-\frac{2}{5}x +8.4$

6 0

3 years ago

Find the value of 9 - 6x when x = -9.

sergij07 [2.7K]

Answer:

-63 is the answer.

7 0

3 years ago

Read 2 more answers

Use differentials to estimate the amount of paint needed (in m3) to apply a coat of paint 0.04 cm thick to a hemispherical dome

pogonyaev

The amount of paint is the volume of paint needed.

The amount of paint needed is 0.065312 cubic meters

<h3>How to determine the amount of paint needed</h3>

The volume of a hemisphere is:

$V = \frac 23\pi r^3$

Differentiate the above equation

$V' = 2\pi r^2 r'$

The above equation represents the estimate of the amount of paint needed.

Where:

r represents the radius (r = 52/2 m)
r' represents the thickness (r' = 0.04 cm)

So, we have:

$V' = 2\pi r^2 r'$

$V' = 2 * 3.14 * (52/2\ m)^2 * (0.04cm)$

$V' = 2 * 3.14 * (26\ m)^2 * (0.04cm)$

Express cm as m

$V' = 2 * 3.14 * (26\ m)^2 * (0.0004m)$

$V' = 0.065312 m^3$

Hence, the amount of paint needed is 0.065312 cubic meters