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kondor19780726 [428]
3 years ago
14

Which property is used in the problem below? 2(x+4)=2x+8 the associative property the commutative property the distributive prop

erty the additive identity property
Mathematics
2 answers:
Serga [27]3 years ago
6 0
The answer is C) The Distributive property.
2(x+4) got turned into 2x+8.

The distributive property does this:
2 times x plus 2 times 4.

2 times x = 2x
2 times 4 = 8.

So the answer is 2x+8.

C) Distributive property is right.
mina [271]3 years ago
3 0

Answer: I took a test, the answers C.

Step-by-step explanation:

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The answer would be 21,000,000.00
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3 years ago
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program that generates two random numbers between one and 11. what is the probability that both values will be more than 7? numb
katovenus [111]

Answer:

1/9

Step-by-step explanation:

The numbers between 1 and 11 are:

2, 3, 4, 5, 6, 7, 8, 9, 10

There are 9 numbers.

Of the 9 numbers, 8, 9, and 10 are greater than 7, so there are 3 numbers greater than 7.

p(number greater than 7) = 1/3

p(>7) = 1/3

Each time a number is selected, the probability it is greater than 7 is 1/3.

For two numbers, you have two independent events, so the overall probability is the product of the individual probabilities.

p(>7 then >7) = p(>7) * p(>7) = 1/3 * 1/3 = 1/9

6 0
3 years ago
Find the time required for an object to cool from 280°F to 220°F by evaluating the following where t is time in minutes. (Round
blsea [12.9K]

9514 1404 393

Answer:

  5.8496 min

Step-by-step explanation:

  \displaystyle t=\frac{10}{\ln{2}}\int_{220}^{280}{\frac{1}{T-100}}\,dT=\frac{10(\ln{(280-100)}-\ln{(220-100)})}{\ln{2}}=\frac{10\ln{(3/2)}}{\ln{2}}\\\\\boxed{t\approx5.8496\quad\text{min}}

__

Modern calculators can perform integration with high accuracy. This one gives the same result.

4 0
3 years ago
You deposit $300 in a savings account. The account earns 2% simple interest per year. What is the interest and balance earned af
kenny6666 [7]

Answer:

$365.70

Step-by-step explanation:

The formula to find this is y = a(1+r)^t\\

For this, a is the initial amount, r is the growth rate percentage (but displayed as a decimal), and t is time.

So to solve, you would do

y = 300(1+0.02)^10\\y = 300(1.02)^10\\y = 365.698325998\\OR\\y = $365.7 in interest

6 0
3 years ago
How many 3-letter sequences can be formed if the second letter must be a vowel (A, E, I, O, or U), and the third letter must be
erica [24]

Answer:

120 ways

Step-by-step explanation:

Given that, 3-letter sequences should be formed, where the second letter must be a vowel (A, E, I, O, U) and the third letter must differ from the first letter.

There are 26 alphabets in English,

so, firstly let us fix the second letter to be one of the vowels

now we are left with 25 alphabets and now let us fix the third letter to be an alphabet from the remaining 25 alphabets.

now, we are left with 24 alphabets and the first letter can be any of these 24 alphabets.

so, there are 24 ways to fill the sequence.

The same thing can be done with the other 4 vowels.

so, total number of ways =   5 × 24 = 120 ways.

 

8 0
3 years ago
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