Answer:
x = 20
Step-by-step explanation:
-7 (2) = -14 so...
10 (2) = 20
To solve this problem, we first must rewrite each term in the form k times a^n so that we can compute the multiplication afterwards. To do this, we must remember that the square root of a is equivalent to a^(1/2) and that variables in the denominator have negative exponents. Using this knowledge, we can rewrite the given expression as:
a^(1/2) * (2a² - 4a^(-1))
Now, we must recall that when terms with the same base are multiplied together, we must add the exponents when simplifying. This step is shown below.
2a^(1/2 + 2) - 4a^(1/2 - 1)
The next step is to perform the addition of the exponents and obtain our final answer.
2a^(5/2) - 4a^(-1/2)
The above expression is your final answer.
Hope this helps!
Look at the remaining trees and the number of oranges they produced.
41790 oranges were produced.
Each tree produced 210 oranges.
The number of remaining trees is 41790/210.
Originally, there we 5 more trees.
The original number of trees is 41790/210 + 5
The equation is
t = 41790/210 + 5
Now we evaluate the right side.
t = 199 + 5
t = 204
The original number of orange trees is 204,
Three students want to estimate the mean backpack weight of their schoolmates. To do this, they each randomly chose 8 schoolmates and weighed their backpacks. Then as per the given sample data,
(a) The sample means of the backpacks are: 6.375,6.375,6.625
(b) Range of sample means: 0.25
(c)The true statement is: The closer the range of the sample means is to 0, the less confident they can be in their estimate.
For the first sample, mean= 6.375
For the second sample, mean= 6.375
For the third sample, mean= 6.625
Range of sample means=Maximum Mean- Minimum Mean
= 6.625 - 6.375
= 0.25
The students will estimate the average backpack weight of their classmates using sample means, the true statement is:
The closer the range of the sample means is to 0, the more confident they can be in their estimate.
Learn more about range here:
brainly.com/question/24326172
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Answer:
1. 1/4
2. -3
3. 3
4. -3/2
5. -2
6. -3/4
Step-by-step explanation: