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zimovet [89]
2 years ago
15

Are the solutions correct?

Mathematics
1 answer:
Aloiza [94]2 years ago
4 0

Answer:

First one is wrong. x should be 16.

Second one is not completely visible, so cannot say.

Step-by-step explanation:

In the last step, the divison by 4 yields:

x/16 = 1, so x = 16

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1 point
damaskus [11]

Answer:

Step-by-step explanation:

I think the question is  card(A)=20,card(B)=15,card(A∩B)=10, then what iscard(A∪B)  

You can solve this question by drawing a picture like this to visualize the problem.

Thus the answer is  card(A∪B)=card(A)+card(B)−card(A∩B)=25

8 0
3 years ago
A smaller square park has an area 3600 square meters what is the length of one side of the park
rjkz [21]

Squares have equal side lengths, so that is why the question is only asking for one side length.

The area of a square is calculated using the formula s^2, where s stands for a side of the square.

To find the length of one side of the park, you can take the given area (3,600 m^2) and square root it. This would give you the length of one side of the square park.

√3,600 = 60

The length of one side of the park is 60 meters.

7 0
3 years ago
Use the value of the linear correlation coefficient r to find the coefficient of determination and the percentage of the total v
adoni [48]

The coefficient of determination is the square of the correlation coefficient, and the value is 0.0151

<h3>How to determine the coefficient of determination?</h3>

The given parameter is:

Correlation coefficient, r = 0.123

Rewrite as:

r = 0.123

Take the square of both sides

r² = 0.123²

Evaluate the square

r² = 0.015129

Approximate

r² = 0.0151

The coefficient of determination is represented by r²

Hence, the coefficient of determination is 0.0151

Read more about coefficient of determination at

brainly.com/question/20263006

#SPJ1

7 0
2 years ago
PLEASE HELP!!
Tems11 [23]
For 70 people i would say ab 445
4 0
2 years ago
Hey can you please help me posted picture of question :)
andriy [413]
The answer is the answer is C and F.

This is found by inserting the equation above into the quadratic formula or -b plus or minus the square root of b^2 - 4ac over 2a.

With that, you find that the first number is a -3, which eliminates choices B and D.

Then, solving the 4ac portion, you find that inside the square root the number is 29, which gives you the last two answer choices.

Hope this helps!
5 0
3 years ago
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