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3 years ago

8

What is the simplified form of the following expression? 6c^2 + 2.5d - d + 2c^2 - 3d

1 answer:

Airida [17]3 years ago

4 0

Simplify the Expression.

8c^2 - 1.5d <span />

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Please help figure out I will give brainliest!

noname [10]

Answer:

40 student 110 adult

this is using desmos

but to smash the equation you can go like basically we have to cancel out each variable to solve for the other

3x + 8y = 1000

x + y < =150

-3(x + y <= 150)

-3x -3y = -450

3x + 8y = 1000

5y = 550

y= 110

3x + 8 y = 1000

-8(x+y<=150) = -8x - 8y <= -1200

-5x = -200

$\frac{ - 5x}{ - 5 } = x$

$\frac{ - 200}{ - 5} = 40$

x= 40

40 kids 110 adults

7 0

2 years ago

A lampshade has a height of 12cm and upper and lower diameters of 10cm and 20cm A)what area of material is required to cover tha

netineya [11]

Answer:

$(a)\ Area = 195\pi$

$(b)\ Volume = 700\pi$

Step-by-step explanation:

Given

$h = 12$

$d_1 = 10$ --- lower diameter

$d_2 = 20$ --- upper diameter

Solving (a): The curved surface area

This is calculated as:

$Area = \pi l(r_1 + r_2)$

Where

$r_1 = 0.5 * d_1 = 0.5 * 10 = 5$ --- lower radius

$r_2 = 0.5 * d_2 = 0.5 * 20 = 10$ --- upper radius

And

$l = \sqrt{h^2 + (r_1 - r_2)^2$ ---- l represents the slant height of the frustrum

$l = \sqrt{12^2 + (5 - 10)^2$

$l = \sqrt{12^2 + (-5)^2$

$l = \sqrt{144 + 25$

$l = \sqrt{169$

$l = 13$

So, we have:

$Area = \pi l(r_1 + r_2)$

$Area = \pi * 13(5 + 10)$

$Area = \pi * 13(15)$

$Area = 195\pi$

Solving (b): The volume

This is calculated as:

$Volume = \frac{1}{3}\pi * h * (r_1^2 + r_2^2 + (r_1 * r_2))$

This gives:

$Volume = \frac{1}{3}\pi * 12 * (5^2 + 10^2 + (5 * 10))$

$Volume = \frac{1}{3}\pi * 12 * (25 + 100 + (50))$

$Volume = \frac{1}{3}\pi * 12 * (175)$

$Volume = \pi *4 * 175$

$Volume = 700\pi$

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2 years ago

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ch4aika [34]

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3 years ago

Need help with this question

Veronika [31]

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2 years ago

When someone donated 14 gallons of paint to Rosendale Elementary School, the fifth grade decided to use it to paint murals. They

Naddika [18.5K]

Answer:

Answered

Step-by-step explanation:

Total amount of paint = 14 gallons

the paint was distributed equally among 4 classes

a. therefore each class would get $\frac{14}{4}$ gallons of paint

= $3\frac{1}{2}$ gallons each

b.Three classes will use 3× paint of each class

= $3\times3\frac{1}{2}$ = 10(1/2) gallons

c. 4 student paint 30 square-foot wall the each student would paint

$\frac{30}{4}$ = 7(1/2) square-foot wall.

d. each student will paint $\frac{1}{4}$ of the wall since there are 4 students.

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3 years ago