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3 years ago

How would I solve this problem-6.3n=-8.19

Mathematics

1 answer:

Gre4nikov [31]3 years ago

5 0

-6,3n=-8,19, so n=8,19/6,3,
hence n=1,3.

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Jordan built her cat Tuna a new scratching post. She needs to cover the post with carpet. How much carpet does Jordan need to co

Marrrta [24]

Answer:

Jordan needs $3,800\ cm^2$ of carpet to cover the surface area of the post

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The surface area of a prism is equal to

$SA=2B+Ph$

where

B is the area of the base of the prism

P is the perimeter of the base of the prism

h is the height of the prism

<em>Find the area of the base B</em>

$B=10^2=100\ cm^2$

<em>Find the perimeter of the base P</em>

$P=4(10)=40\ cm$

we have the height h

$h=90\ cm$

substitute the values

$SA=2(100)+40(90)$

$SA=3,800\ cm^2$

5 0

3 years ago

Read 2 more answers

Pete, Chris, and Dina realized that the number of A’s they each received on their report cards were in a ratio of 4:2:5. If Pete

Fiesta28 [93]

Answer:

A's received by Dina is 35.

Step-by-step explanation:

Given

number of A’s received by Pete, Chris, and Dina on their report cards were in a ratio of 4:2:5.

Let the

A's received by Pete = 4x

A's received by Chris = 2x

A's received by Dina = 5x

This, is done so that ratio of 4:2:5 remains intact.

Now, given Pete got 14 more A’s than Chris got

Thus, writing it mathematically

A's got by Pete = A's got be Chris + 14

we will be using A's got Pete and Chris in term of x as defined above

4x = 2x+ 14

=> 4x - 2x = 14

=> 2x = 14

=> x = 14/2 = 7

A's received by Dina = 5x = 5*7 = 35( Answer).

6 0

3 years ago

Factorise x2 - 38x + 72

Julli [10]

Answer:

Step-by-step explanation:

x² - 38x + 72 = (x-2)(x-36)

5 0

3 years ago

Can someone please help me with part B?

Ira Lisetskai [31]

Y = - 20x + 100

Slope is -20, y-intercept is 100.

4 0

3 years ago

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