All categories

3 years ago

How do I work out this equation?

Mathematics

1 answer:

Annette [7]3 years ago

4 0

$a_{11}=2\cdot11^2+3\cdot11-2=2\cdot121+33-2=242+31=273$

You might be interested in

An experiment requires the population of the bacteria to reach 2 million before the experiment can begin. The reproduction rate

Furkat [3]

Answer:

about 6 hours

Step-by-step explanation:

$8( {7}^{x} ) = 2( {10}^{6} )$

${7}^{x} = 250000$

$x = \frac{ ln(250000) }{ ln(7) } = 6.39$

6 0

2 years ago

Hi , step by step please

Zigmanuir [339]

Answer:

Eldest: $335,500 Middle: $182,750 Youngest: $167,750

Step-by-step explanation:

Let's represent the amount of money the youngest sibling received as x.

The amount the eldest received can be represented as: 2x

The amount the middle sibling received can be represented as: x + 15,000

If we combined the amount of money that all of the siblings received, it would be $686,000. We can write this as an equation:

686,000 = 2x + (x + 15,000) + x

Now let's solve for x. First, combine like terms

686,000 = 4x + 15,000

Subtract 15000 from both sides to isolate the 4x

671,000 = 4x

Divide both sides by 4 to isolate the x

167,750 = x

Now we know that the amount of money the youngest received is $167,750. We can use this amount to figure out how much the other two siblings received.

Eldest: 2 * 167,750 = $335,500

Middle: 167,750 + 15,000 = $182,750

We can check to make sure these answers are correct by adding them all together to make sure that they equal 686,000

167,750 + 335,500 + 182,750 = 686,000

7 0

3 years ago

Researchers wanted to see which species of lizard (A, B, or C) is most likely to survive a bacterial infection. So they infected

Slav-nsk [51]

Answer:

A) attached below

B) 0.61

C) 0.47

Step-by-step explanation:

Given data:

Total number of lizards infected = 38

Of the 15 species B lizards 40% survived

For specie C one more survived than died

Out of the 24 lizards that died 1/3 were species A

A) contingency table

attached below

B) Determine the proportion of these lizards in this study that were either specie A or Specie B

P ( A or B ) = ( 8 + 15 ) / 38 = 0.605 ≈ 0.61

C) determine the probability that specie C lizard did not study

P ( not surviving | C ) = 7 / 15 = 0.466 ≈ 0.47

7 0

2 years ago

What number is 5 more than -4

Fantom [35]

1 because negative 4 plus 5

4 0

2 years ago

Read 2 more answers

Please help me with this

Lisa [10]

100%-26%
426000*(1-0.26)^t, yearly
(0.74^(1/12))=0.74^0.083 monthly rate of decrease
Equation for calculation population
426000*(0.74^0.083)^12t

I think it should look like this 0.74^0.083 monthly rate of decrease

5 0

3 years ago

Read 2 more answers