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vivado [14]
3 years ago
9

What is the factores form of (2x^2+11x-40)?

Mathematics
1 answer:
Cerrena [4.2K]3 years ago
7 0

{2x}^{2}  + 11x - 40 \\  = (2x  -  5)(x + 8)

Hope this helps. - M
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The circumference of a circle is 23π m. What is the area, in square meters? Express your answer in terms of \piπ
LenaWriter [7]

Answer:

Area of the circle =   \frac{529}{4}  π  m²    or      132.25 π  m²

Step-by-step explanation:

To find the area, we will follow the steps below.

First write down the formular for the circumference of a circle, then use the formula to find the radius of the circle after which you can now find the area of the circle.

That is;

C = 2πr

where c is the circumference of the circle and   r is the radius of the circle

From the question given, circumference C = 23π

23π = 2π r

Divide both-side of the equation by 2π

23π/2π  =  2πr/2π

23/2   =  r

radius =   \frac{23}{2}  m

Formula for calculating the area of a circle is given by;

A = πr²

where A= area of the circle   and   r is the radius of the circle

A = π ( \frac{23}{2} )²

A = \frac{529}{4}  π  m²    or      132.25 π  m²

Area of the circle =   \frac{529}{4}  π  m²    or      132.25 π  m²

6 0
3 years ago
Which is the measure of angle C ?
zubka84 [21]

Answer:

A

Step-by-step explanation:

if the triangles are similar the ange B and E are the same, A and D are the same and C and F are the same.

B=77 and E=77

F=31 and C=31

A=72 and D=72

8 0
3 years ago
Andreas wants to estimate how many fish there are in a lake. One day he catches 20 fish,marks them,and returns them to the lake.
tensa zangetsu [6.8K]

Answer:

50

Step-by-step explanation:

The ratio of marked fish to caught fish is 4:10, we need to solve for x in 20:x, since 4 * 5 = 20, 10 * 5 = x so x = 50 fish.

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3 years ago
Which of the sequences is an arithmetic sequence? ​
PilotLPTM [1.2K]

Answer:

D

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
K^2+8k-9=0 can you help me solve with showing work
givi [52]
Using the PSN method:

P = -9
S = 8
So N = 9,-1

Using 9 and -1 in the original equation gives:

k^2+9k-k-9=0
\\k(k+9)-1(k+9)=0
\\(k-1)(k+9)

\\\\k=1,-9
7 0
2 years ago
Read 2 more answers
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