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Pepsi [2]
3 years ago
13

Explain how to determine if the two expressions are equivalent using x = 6 and x = 10.

Mathematics
2 answers:
muminat3 years ago
8 0
Substitute the x for 6 then 10,

8(6)+40 8(6+5)
8(10)+40 8(10+5)
then calculate
SIZIF [17.4K]3 years ago
7 0

Sample Response: If both expressions have the same value after substituting and simplifying for x = 6 and x = 10, then they are equivalent. Substitute 6 for each variable, x, in both expressions. Use the order of operations to simplify both expressions. The value of both expressions is 88. Now, substitute 10 for each variable, x, in both expressions. Use the order of operations to simplify both expressions. The value of both expressions is 120. Therefore, the expressions are equivalent.

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mote1985 [20]

Answer:

$55.20

Step-by-step explanation:

Create a proportion where x is the cost of 12 lbs of walnuts:

\frac{3.45}{0.75} = \frac{x}{12}

Cross multiply and solve for x:

0.75x = 41.4

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So, for 12 lbs of walnuts, it will cost $55.20

8 0
3 years ago
Two thirds times a number plus fifteen totals nine. what is the number?
kondor19780726 [428]

Let x represent the number:

2/3(x)+15=9

2/3(x)= -6

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x= -6*(3/2)

x= -9

8 0
3 years ago
Whats 10x2= n nnn nnnnnnn
sasho [114]

Answer:

20

Step-by-step explanation:

10 x 1 = 10. 10 x 2 = 20.

7 0
3 years ago
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Forty-seven percent of fish in a river are catfish. Imagine scooping out a simple random sample of 25 fish from the river and ob
Romashka-Z-Leto [24]

Answer: The standard deviation is 0.0998. The 10% condition is met because it is very likely there are more than 250 fish in the river.

Step-by-step explanation:

The standard deviation of the sampling distribution = \sqrt{\dfrac{p(1-p)}{n}} , where p= population proportion and n = sample size.

Let p be the proportion of  fish in a river are catfish.

As per given , we have

p= 0.47

n= 25

The, the standard deviation of the sampling distribution will be \sqrt{\dfrac{0.47(1-0.47)}{25}}

=\sqrt{0.009964}\approx0.0998

The 10% condition : Sample sizes should be no more than 10% of the population.

But a river can have more than 250 fish [where 10% of 250 =25 (sample size)]

i.e. The 10% condition is met because it is very likely there are more than 250 fish in the river.

So the correct answer is "The standard deviation is 0.0998. The 10% condition is met because it is very likely there are more than 250 fish in the river."

7 0
3 years ago
Suppose that a company claims that its batteries last 240 hours on average.
VashaNatasha [74]

Answer:

The answer is option B. 240

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3 years ago
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