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Temka [501]
3 years ago
14

If x^2+y^2=49,xy=7 find x^3-y^3

Mathematics
1 answer:
Vikki [24]3 years ago
4 0

Answer: 0

Step-by-step explanation: First substitute 7 for x and y

                                             7^3-7^3 = 0

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If f(x) = x² + 7, what is the value of f(4)? Enter the answer in the box. PLEASE HELP .
bazaltina [42]

Answer:

23

Step-by-step explanation:

With f(4), we plug 4 into the function.

f(4) = 4² + 7

f(4) = 16 + 7

f(4) = 23

7 0
3 years ago
If m∠2=39 and m∠3=30, what is m∠1?
satela [25.4K]

Answer:

The answer would be A.) 111

Step-by-step explanation:

The angles of any triangle must add up to 180. So you subtract ∠1 and ∠2 from 180 and you will get the 3rd angle.

7 0
3 years ago
For each of parts (a) through (d), indicate whether we would generally expect the performance of a flexible statistical learning
olga_2 [115]

Step-by-step explanation:

First, note that a flexible statistical learning method refers to using models that take into account agree difference in the observed data set, and are thus adjustable. While the inflexible method usually involves a model that has no regard to the kind of data set.

a) The sample size n is extremely large, and the number of predictors p is small. (BETTER)

In this case since the sample size is extremely large a flexible model is a best fit.

b) The number of predictors p is extremely large, and the number of observations n is small. (WORSE)

In such case overfiting the data is more likely because of of the small observations.

c) The relationship between the predictors and response is highly non-linear. (BETTER)

The flexible method would be a better fit.

d) The variance of the error terms, i.e. σ2=Var(ϵ), is extremely high. (WORSE)

In such case, using a flexible model is a best fit for the error terms because it can be adjusted.

6 0
3 years ago
I would like to know what the axis of symmetry is for this question
scZoUnD [109]

Answer:

x = –4

Step-by-step explanation:

x = –koef x / (2•koef x²)

8 0
3 years ago
GIVING BRAINLIEST
bearhunter [10]

Heyo!

l believe the answer is D.

hopefully, this helps you!!!

idqfxemo~

6 0
2 years ago
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