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KatRina [158]
2 years ago
5

(b) Factorise fully 9 b - 3 b squared

Mathematics
2 answers:
mixas84 [53]2 years ago
6 0

Answer:

9b - 3 {b}^{2}  = 3b(3 - b) \\

I hope I helped you^_^

Nezavi [6.7K]2 years ago
3 0

Answer:

36b²

Step-by-step explanation:

..............ygug

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Find the distance from the base of the ladder to the house.
True [87]

Answer:

tfeybgchhimliehbu uhuijo;k,l

Step-by-step explanation:

1.vuybcewouinjhi

2.dfbvfdsa

7 0
3 years ago
Describe the faces, edges, verticals of each three dimensional figure. Then identify it.
EastWind [94]

When you have to describe a 3D shape you have to keep the following definitions in mind:

<em>1. The face of a 3D shape is a flat surface.</em>

The shape on the picture has 3 rectangular faces and 2 triangular faces, a total of 5 faces.

<em />

<em>2. The edge is where two faces meet.</em>

For the shape on the picture, there are 3 edges, where the rectangular faces meet each other, and then three edges where the rectangular faces meet each of the triangular faces, this shape has a total of 9 edges.

<em>3. The vertex is a corner, where the edges meet.</em>

There are three vertices on each end of the shape, so it has a total of 6 vertices.

A shape that has 5 faces, 9 edges, and 6 vertices is a triangular prism.

6 0
1 year ago
A sample of bacteria is decaying according to a half-life model. If the sample begins with 800 bacteria, and after 13 minutes th
nikklg [1K]

Answer:

56.42 minutes

Step-by-step explanation:

The initial sample= y0 = 800

After 13 minutes , amount = 320

Y= y0e-kt

320 = 800e-k(13)

320/800 = e-k13

0.4 = e-k13

In0.4 = -k13

-0.91629= -k13

0.07048= k

Y = 800e-0.07048t

Minutes when the bacterial present will be 15

15 = 800e-0.07048t

15/800= e-0.07048t

0.01875 = e-0.07048t

In 0.01875 = -0.07048t

-3.97656 = -0.07048t

-3.97656/-0.07048= t

56.42 = t

56.42 minutes

3 0
3 years ago
3. A rectangular prism has dimensions of ½ 2, and 7/2 in.
sp2606 [1]

Answer:

answer c is 28 cubes

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
What's the expression for the given value of the variable. 3x+5 when x=5
Pepsi [2]

1) Let's evaluate that expression

3x+5

2) Since the value of x has been given, then let's plug that into the expression

3x+5

3(5) +5

15 +5

20

3) The answer is 20

8 0
1 year ago
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