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White raven [17]
2 years ago
5

Use the linear combination method to solve the system of equations. –3x + 8y = 16 3x + 4y = 8 What is the value of x? –1 0 1 2

Mathematics
2 answers:
4vir4ik [10]2 years ago
7 0

Answer:

B. 0

Step-by-step explanation:

Your welcome :)

irinina [24]2 years ago
5 0

Answer:

b.0

Step-by-step explanation:

i got it right

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At work, Brett must check and record the internal temperature of the freezer on an hourly basis. When working properly, the temp
kiruha [24]

Answer:

Zero

Step-by-step explanation:

The temperature will remain constant over time. This means the slope of the graph will be constant from one point of the graph to the other, which cancels out to zero.

8 0
3 years ago
During an experiment, some water was removed from each of the 6 water tanks. If the standard deviation of the volumes of water i
Julli [10]

Answer:

First statement is correct.

Step-by-step explanation:

If we add or subtract a constant to each term in a set:  Mean will increase or decrease by the same constant.  Standard Deviation will not change.

If we increase or decrease each term in a set by the same percent (multiply all terms by the constant):  Mean will increase or decrease by the same percent.  Standard Deviation will increase or decrease by the same percent.

For example:

Standard Deviation of a set: {1,1,4} will be the same as that of {5,5,8} as second set is obtained by adding 4 to each term of the first set.

That's because Standard Deviation shows how much variation there is from the mean. And when adding or subtracting a constant to each term we are shifting the mean of the set by this constant (mean will increase or decrease by the same constant) but the variation from the mean remains the same as all terms are also shifted by the same constant.

So according to this rule, statement (1) is sufficient to get new Standard Deviation, it'll be 30% less than the old.. As for statement (2) it's clearly insufficient as knowing mean gives us no help in getting new Standard Deviation.

6 0
3 years ago
X + 15 - 4<br> Please help ty
IrinaK [193]
x+15-4 \\ \\ =x+11
4 0
3 years ago
Solve the equation in the complex number system.
tatiyna
To get rid of x^{3}, you have to take the third root of both sides:
\sqrt[3]{x^{3}} = \sqrt[3]{1}
But that won't help you with understanding the problem. It is better to write x^{3}-1 as a product of 2 polynomials:
x^{3}-1 = (x-1)\cdot (x^{2} +x +1)
From this we know, that x-1 = 0 => x = 1 is the solution. Another solutions (complex roots) are the roots of quadratic equation.
3 0
2 years ago
Read 2 more answers
would set a new school record? A number line going from 515 to 521. An open circle is at 518. Everything to the left of the circ
Rudik [331]

Answer:

C

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
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