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zaharov [31]
3 years ago
7

What is the product? (6r-1)(- Br-3)

Mathematics
1 answer:
Andru [333]3 years ago
4 0

Answer:

-6Br^2-18r+Br+3

Step-by-step explanation:

we have the expression:

(6r-1)(- Br-3)

We need to multiply the two terms in the first parenthesis by the two terms in the second parenthesis:

(6r)(-Br)+(6r)(-3)+(-1)(-Br)+(-1)(-3)

we solve each term taking into account the law of signs

(-)(-)=+

and

(+)(-)=-

also for the first term we use that r*r=r^2

thus we have:

-6Br^2-18r+Br+3

it can be simplified a little more if we factor an r of the second and third term:

-6Br^2+r(-18+B)+3

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The diameter of a sphere is 4 centimeters. Which represents the volume of the sphere?
frosja888 [35]

Answer:

256π/3 cm³

Step-by-step explanation:

d = 2r => r = d/2 = 4cm/2 = 2 cm

V(sphere) = 4π·r³/3

= 4π·64/3 cm³

= 256π/3 cm³

7 0
3 years ago
An architect designed this scale model of a warehouse for a building contractor.
Annette [7]

tl;dr Answer is C

Here we will have to calculate 3 different areas separately.

When calculating the area of the triangle we will use the formula

A = (h*b)/2  

A = Area

h = height

b = base

To find the height we do X - Z  

23 - 15 = 8 ft

To find the base we do Y - W

19 - 13 = 6 ft

Using the formula above we can now solve for A  

A = (8*6)/2

A = (48)/2

A = 24 sq ft

Now we solve the two rectangles using the formula  

A = wl

w = width

l = length

We will calculate the area of the left most rectangle first.

We know the length of the rectangle because it's Y - W and we are given the width of the triangle.

w = 15 ft

l = 6 ft

A = 15*6

A = 90 sq ft

Second Rectangle has the width of X and length of W

w = 23 ft

l = 13 ft

A = 23 * 13

A = 299 sq ft

Now we add all the areas to give us the total area of the warehouse.

24 + 90 + 299 = 413 sq ft

Therefore, the answer is C

5 0
3 years ago
The length of a rectangle is half the width the area is 25 square meters. What’s the perimeter.
lukranit [14]
I don't like that is not a question
6 0
3 years ago
Members of a school sports team are raising money by selling custom water bottles at school activities. They plan to sell each b
andre [41]

Answer:

B. (13 - 6)n - 40

Step-by-step explanation:

If each bottle costs them $6 and they are selling each one for $13, the amount of money they make for each bottle can be represented by (13 - 6)n

This is because this finds the profit per bottle, then multiplies it by n, which is the number of bottles they sell.

Then, since they spent $40 on advertising, subtract 40 from this.

The expression will be (13 - 6)n - 40.

The correct answer is B. (13 - 6)n - 40

5 0
2 years ago
What number has the same value as 12 tens?
Sergio [31]
1,200, this is because 12 time 10 is 1,200
4 0
3 years ago
Read 2 more answers
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