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Pani-rosa [81]
3 years ago
6

Each year, the Department of Water Works measures the chloride concentration level in the water. The first year, they found the

chloride concentration changed by −1 and 3/5 mg/L . It is estimated that the chloride concentration will change −2 and 1/15 mg/L the next year.
What is the total change that will likely occur in 2 years?

Enter your answer as a simplified mixed number in the box.
Mathematics
1 answer:
Elan Coil [88]3 years ago
8 0
I think the answer is 3 1/4
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Please answer hurry!!!!
lutik1710 [3]
The best way to solve this problem is by plugging in each answer choice for both equations and seeing which one works. You can already see that choice A doesn't work because -1 is not greater than or equal to 4. That means you just need to test choices B and C!

Choice B (4, -2)
x + y  \geq 6\\
4 + -2  \geq 6\\
2  \geq  6 

2 is not greater than or equal to 6, so choice B doesn't work.

Choice C (4, 2)
x + y \geq 6\\ 
4 + 2 \geq 6\\ 
6 \geq 6 \\\\
x  \geq 4\\
4 \geq 4
Since 6 is equal to 6 and 4 is equal to 4, choice C works!

-------

Answer: C) (4, 2)
6 0
3 years ago
Natalia sawed five boards of equal links to make a school each was 9/10 of a meter long what is the total length of the board sh
Alexxandr [17]
5×9/10=4.5
        9/10          1 8/10         2 7/10        3 6/10             4 5/10
---------------l--------------l---------------l----------------l----------------
5 5/10=4 1/2=4.5
6 0
3 years ago
Find the constant of variation k for the direct variation 2x +6y = 0
scoray [572]
<span>A relationship between two variables in which one is a constant multiple of the other. The constant here is also called the constant of variation. In order to obtain this value, we manipulate the equation by isolating the variables. We do as follows:

</span><span>2x +6y = 0
y = -x/3

Therefore, the constant of variation is -1/3. Hope this answers the question. Have a nice day.</span>
5 0
3 years ago
a primary school budgeted for $16200.00 to renovate the school the school raised 25%and applied for the rest of the amount from
frutty [35]

Answer:

Step-by-step explanation:

a primary school budgeted for $16200.00 to renovate the school the school raised 25%and applied for the rest of the amount from a bank how much did the school apply from the bank? ​

a primary school budgeted for $16200.00 to renovate the school the school raised 25%and applied for the rest of the amount from a bank how much did the school apply from the bank? ​

6 0
3 years ago
A rectangle is inscribed with its base on the x axis and its upper vertices on the parabola y=cos x. What is the maximum area th
tresset_1 [31]

Answer:

-3-3x=12

-3x=15 add 3 to both sides

x=-5 divide by -3 on both sides

x is equal to -5

if it helps plz mark brainliest

Step-by-step explanation:

7 0
3 years ago
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