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hammer [34]
3 years ago
13

Please answer this correctly

Mathematics
2 answers:
Burka [1]3 years ago
8 0

Answer:

Step-by-step explanation:

Bring the like term together and add them

8r + 7 + 6 +r = 8r + r + 7 + 6

                    = 9r + 13

Aleksandr-060686 [28]3 years ago
5 0

Answer:

9r+13

Step-by-step explanation:

To solve this question, all we need to do is simplify the equation.

The equation is 8r+7+4+r. To simplify, we need to add like terms.

8r+r+7+4=9r+13

9r+13 is the equivalent equation to 8r+7+4+r.

Hope this helps!

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Roll a die 10 sided die 3 times. What is the probability that the sequence is strictly increasing or decreasing?
snow_lady [41]

Answer:

The probability of obtaining a sequence which is neither strictly increasing nor decreasing in 0.76.

Step-by-step explanation:

We have 10 possible outcomes on a single throw.

So, outcomes in 3 throws = 10^{3} =1000 outcomes.

Let x be the number of strictly increasing arrangements.

Let y be the number of strictly decreasing arrangements.

Let z be the number of outcomes that are neither strictly decreasing nor strictly increasing

So, we have x+y+z=1000

If we look at a strictly increasing arrangement from the other/opposite side, it will look like a strictly decreasing arrangement.

So, x = y

Hence, we can say the final equation will be :

2x+z=1000

And for strictly increasing arrangements ,all 3 numbers will be different and it can be done in 10C3 ways.

10C3=\frac{10!}{3!7!} = 120 ways

So, 2x=2\times120=240

Thus z=1000-240=760

So, the probability is = \frac{760}{1000} = 0.76

Therefore, the probability of obtaining a sequence which is neither strictly increasing nor decreasing in 0.76.

4 0
2 years ago
A company manufactures and sells mini-recorders. A survey of office supply stores indicated that at a price of $82 each, the dem
Nutka1998 [239]
The first one. Substitute both $82 and $42 to get the 4 and 9 hundreds.

Y = -1/8*82+57/4 = 4 hundreds
3 0
3 years ago
Help me please thank you
Lapatulllka [165]
All of them except TR and PH
3 0
3 years ago
109.25714 x 0.0876 = 9.56 (sales tax)<br> helppp step by step on how they did this
kati45 [8]

Answer:

9.570925464=9.56

Step-by-step explanation:

multiply the numbers:

109.25714×0.0876=9.569.570925464=9.56

(Just so you know i put this answer in the other question you asked.)

Hope this helps

7 0
2 years ago
solve The mean score of a competency test is 60, with a standard deviation of 5. Between what two values do about 68% of the val
Anna11 [10]

Answer:

Between 55 and 65

Step-by-step explanation:

The Empirical Rule states that, for a normally distributed(bell-shaped) random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

In this problem, we have that:

Mean = 60

Standard deviation = 5

Between what two values do about 68% of the values lie?

By the Empirical Rule, within 1 one standard deviation of the mean. So from 60-5 = 55 to 60+5 = 75.

5 0
3 years ago
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