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Ludmilka [50]
3 years ago
10

Factor: a² + 9a+20 A (a-4)(-5) B (a+2)(a +10) C (-2)(a-10) D (a+4)(a +5)

Mathematics
2 answers:
konstantin123 [22]3 years ago
8 0

Answer: is D

Answer is D

Nina [5.8K]3 years ago
6 0

Using the simple method of quadratic expression:

we find two  numbers(the first and last word) that when we multiply is the same as when we add them together.

a²+9a+20

a²+4a+5a+20

The answer is D

a(a+4)+5(a+4)

(a+4)(a+5)

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Which figure best demonstrates the setup for the box method of finding the area of a triangle
Ivanshal [37]
Hi there! The third option shows us the best setup.

We can find the area of a triangle with the standard formula area = 1/2 * base * height.

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4 years ago
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If x^3+ax^2-18x+b = (x+5)(x-4)(x+2) what is a and b
blondinia [14]

♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️

(x + 5)(x - 4)(x + 2) =

(x + 5) ({x}^{2}  - 2x - 8) =

{x}^{3}  - 2 {x}^{2}  - 8x + 5 {x}^{2}  - 10x - 40 =  \\

{x}^{3}  + 3 {x}^{2}  - 18x - 40

_________________________________

Compare :

{x}^{3}  + 3 {x}^{2}  - 18x - 40

{x}^{3}  + a {x}^{2}  - 18x + b

Thus :

a = 3

and

b =  - 40

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6 0
3 years ago
The base and corresponding height of a parallelogram are 75 cm and 25 cm. If the other base is 50 cm, find out its corresponding
aleksandr82 [10.1K]

Answer:

Height of the parallelogram = 37.5 cm

Step-by-step explanation:

As given,

Base of a parallelogram = 75 cm

Height of a parallelogram = 25 cm

As,

we know that

Area = Base × Height

        = 75 × 25

        = 1875 cm²

As the parallelogram is same

So, Area = Base × Height

⇒1875 = 50 × Height

⇒ Height = \frac{1875}{50} = 37.5 cm

So, we get

Height of the parallelogram = 37.5 cm

7 0
3 years ago
It takes a word processor 33 minutes to process and spell check 6 pages. Find out how long it takes her to process and spell che
Ronch [10]

Answer:

154 minutes to process and spell check 28 pages

Step-by-step explanation:

33 Minutes to process 6 pages

If we divide both of these numbers by 6 we will get the time taken to process 1 page

33 ÷ 6 = 5.5 minutes, and 6 ÷ 6 = 1 page

So 5 and a half minutes per page

To find out how long 28 pages will take, we multiply by 28

5.5 × 28 = 154 minutes, and 1 × 28 = 28 pages

Which gives us the time of 154 minutes to process and spell check 28 pages

3 0
2 years ago
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