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Dmitry [639]
3 years ago
5

A culture started with 2,000 bacteria. After 2

Mathematics
1 answer:
xenn [34]3 years ago
3 0

Answer:

2450

Step-by-step explanation:

First you will divide;

200÷4=50

Then you multiply;

50×9=450

Last you add;

2000+450=2450

Hope this helps :D

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Question 1 (5 points): Consider the system of linear equations x1 − 4x2 − x4 = −7 x2 − 2x4 = 3 x4 + 2x5 = 3 (a) Write down the c
Alika [10]

Answer:

Step-by-step explanation:

Given is a system of equations as

x1-4x2 - x4 = -7\\ \\x2 - 2x4 = 3 \\\\x4 + 2x5 = 3

We have 5 variables and 3 equations

a) coefficient matrix of this system is

1   -4   0   -1   0\\

0    1   0   -2   0\\

0    0   0    1    2\\

We find that x3 has no coefficient in any of the equations so we can omit x3 and write as equations for 4 variables as

1   -4     -1   0\\

0    1     -2   0\\

0    0     1    2\\

b) Augmented matrix is

1   -4     -1   0\\  7

0    1     -2   0\\ 3

0    0     1    2\\3

c) For row operations to ehelon form

we can do R1+4R2 = R1

We get

1   0   -9  0 \\  19

0   1  -2   0 \\   3

0   0   1   2  \\   3

Now let us do R1 = R1+9R3 and R2 = R2+2R3

1  0   0   0  \\ 46

0  1   0   0   \\  9

0   0  1   2   \\  3

d) We find that there are infinite solutions to  the system in parametric form, since x4 and x5 are linked with only one equation

e) x1 = 46, x2 = 9, x4+2x5 =3

Or x1 =46, x2 =9, x4 = 3-2x5, x5 = x5 is the parametric solution

 

8 0
3 years ago
A rental company charges costumers a 14.75 fee plus $0.15 per smile to rent a moving van after returning the moving van a custom
kumpel [21]

Step-by-step explanation:

I guess, the question is, how many miles were driven ?

if that is the case, then

we need to deduct the basic fee of $14.75, as this would have been paid, even if they did not drive a single mile.

so, 50.45 - 14.75 = $35.70

that is the actual cost for the driven miles.

how many miles ?

well, how often do $0.15 fit into $35.70 ?

35.7 / 0.15 = 238 miles.

this customer had been driving the moving van for 238 miles.

8 0
2 years ago
6c^3 +30c / 3c^2 + 15
mario62 [17]
Hello there,

6c^{3} +30c/ 3c^{2} +15 = 16c^{3}+15

Hope this answer has helped you. If it has, Please help me out by marking it as brainliest. Thanks

Have a BRAINLY day.
7 0
3 years ago
What is The exact value of 5.3 million × 2.7 thousand
ipn [44]
Fourteen billion three hundred ten million
6 0
3 years ago
2x-4=10 reverse order algebra
hjlf

Answer:

7

Step-by-step explanation:

2x-4=10

2x=10+4

2x=14

x=14/2

x=7

8 0
2 years ago
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