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Alecsey [184]
2 years ago
12

If u answer please I will mark you as brainliest answer....

Mathematics
1 answer:
Irina18 [472]2 years ago
6 0
I would say (C.) because the scientist only looked for the presence for both not just nickel or just lead.
Hope that helps.......if wrong I apologize.
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Sloan [31]
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8 0
3 years ago
Ann's first option is a plot of land adjacent to a current park.
oksian1 [2.3K]

Given:

The equation for the area of the first option is:

x^2+200x=166400

Where x is the side length of the current square park.

To find:

The side length of the current square park.

Solution:

We have,

x^2+200x=166400

It can be written as:

x^2+200x-166400=0

Splitting the middle term, we get

x^2+520x-320x-166400=0

x(x+520)-320(x+520)=0

(x-320)(x+520)=0

x=320,-520

We know that the side length of a park cannot be negative. So, the only possible value of x is 320.

Therefore, the most direct method to solve the given equation is splitting the middle term and the side length of the current square park is 320 meters.

4 0
2 years ago
If a =7 and b = 2 what is 2ab
e-lub [12.9K]

Answer:

28

Step-by-step explanation:

2(7)(2) =28

5 0
2 years ago
Read 2 more answers
Factor 4a^2-25. Please
Dmitrij [34]

Answer:

(2 a - 5) (2 a + 5)

Step-by-step explanation:

Factor the following:

4 a^2 - 25

4 a^2 - 25 = (2 a)^2 - 5^2:

(2 a)^2 - 5^2

Factor the difference of two squares. (2 a)^2 - 5^2 = (2 a - 5) (2 a + 5):

Answer: (2 a - 5) (2 a + 5)

8 0
2 years ago
Why is the absolute value of every number positive
bekas [8.4K]

Answer:

because you can't get closer to 0 on the number line than 0 units away.

Step-by-step explanation:

it's like walking if the point is 3 foot in front of you and you walk to it once you get to it then even if you keep walking you can't go a negative number of feet away from it because the closest you can get is right on it.

7 0
3 years ago
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