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3 years ago

Quiz What is a solution for this system of equations? y= 7x + 2 y = x + 8

Mathematics

2 answers:

Sever21 [200]3 years ago

6 0

If you are looking for the intersect between the two lines, the answer is (1, 9)

PolarNik [594]3 years ago

3 0

Answer:

subtract them is with i think

Step-by-step explanation:

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Can someone please help me on this one

Artemon [7]

Answer: 78.5 units^2

Step-by-step explanation:

The area of the circle is equal to pi*radius^2.

The diameter is double the radius, which means the radius is 10/2 = 5.

Therefore, the area is pi*5^2 = 25pi.

We use 3.14 for pi and we get 25*3.14 = 78.5 units^2

7 0

2 years ago

The base of an isosceles tiangle has a length of 25. what can you say about the lengths of the legs?

lidiya [134]

The sum of the lengths of any two sides of a triangle must be greater than the length of the third side (or else, it can't be a closed polygon). Since we know that the two sides in question are both of the same length in this case (since the triangle isosceles), their individual lengths must be greater than 25/2 = 12.5.

7 0

3 years ago

Solve the triangle.<br> B = 36°, a = 41, c = 17 (5 points)

8090 [49]

Answer:

b = 29.0, A = 123.9°, C = 20.1°

6 0

2 years ago

Read 2 more answers

Of 560 samples of seafood purchased from various kinds of food stores in different regions of a country and genetically compared

frutty [35]

Answer:

a) (0.5256,0.5944)

c) Criticism is invalid

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 560

Proportion of mislabeled = 56%

$\hat{p} = 0.56$

a) 90% Confidence interval:

$\hat{p}\pm z_{stat}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$z_{critical}\text{ at}~\alpha_{0.05} = \pm 1.64$

Putting the values, we get:

$0.56\pm 1.64(\sqrt{\dfrac{0.56(1-0.56)}{560}}) = 0.56\pm 0.0344\\\\=(0.5256,0.5944)$

b) Interpretation of confidence interval:

We are 90% confident that the true proportion of all seafood in the country that is mislabeled or misidentified is between 0.5256 and 0.5944 that is 52.56% and 59.44%.

c) Validity of criticism

Conditions for validity:

$np > 10\\n(1-p)>10$

Verification:

$560\times 0.56 = 313.6>10\\560(1-0.56) = 246.4>10$

Both the conditions are satisfied. This, the criticism is invalid.

8 0

3 years ago

Primula Brandybuck is sampling the family harvest of tomatoes. She randomly selects 446 tomatoes and inspects them for cracking.

Marta_Voda [28]

Answer:

Step-by-step explanation:

5 0

3 years ago