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Volgvan
3 years ago
14

What does ± indicate when its used like 2±1?​

Mathematics
2 answers:
boyakko [2]3 years ago
6 0

Answer:

it is in quadratic equation meaning you use Plus or minus

stira [4]3 years ago
4 0

Answer:

I is both the plus and minus sign so and 2+1 and subtract 2-1 both answers are the answer

Step-by-step explanation:

The plus–minus sign, ±, is a mathematical symbol with multiple meanings. In mathematics, it generally indicates a choice of exactly two possible values, one of which is obtained through addition and the other through subtraction.

The sign may also represent an inclusive range of values that a reading might have.

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8-2|4-5y|=4<br><br> | | stands for absolute value
Contact [7]

Answer:

y = (2/5) OR y = (6/5)

Step-by-step explanation:

The first step is isolating the expression within the absolute value bars. The first thing we can do is subtract both sides by 8. If we do that, we get -2|4-5y| = -4. Now, to completely isolate the absolute value, we would have to divide by -2. This yields |4 - 5y| = 2. Finally, we can remove the absolute value bars. However, to do this, we need to first understand what an absolute value bar does to an equation. Lets say that |x| = 2. Absolute value describes the DISTANCE of some quantity from 0 (on the number line). Therefore, x (which is inside the absolute value bars) can be either positive or negative 2 (they are BOTH two units away from 0). Similarly, in this case, (4 - 5y) can either be 2 or -2 (because the absolute value of both is 2). Now we have two possible solutions to solve for:

4 - 5y = 2 OR 4 - 5y = -2

5y = 2 OR 5y = 6

y = (2/5) OR y = (6/5)

If we plug both of these answers back into the equation we can see that they both check out.

4 0
2 years ago
Evaluate the trigonometric funtion of the angle theta​
jeka57 [31]
The last side would be 10
8 0
3 years ago
The weights for newborn babies is approximately normally distributed with a mean of 5.4 pounds and a standard deviation of 1.8 p
Mariana [72]

Answer:

You would expect 807 babies  to weigh between 3 and 6 pounds.

Step-by-step explanation:

We are given that

Mean,\mu=5.4pounds

Standard deviation,\sigma=1.8pounds

n=1500

We have to find how  many would you expect to weigh between 3 and 6 pounds.

The weights for newborn babies is approximately normally distributed.

Now,

P(3

=P(-1.33

P(3

P(3

P(3

Number of newborn  babies expect to weigh between 3 and 6 pounds

=1500\times 0.538=807

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3 years ago
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3 0
3 years ago
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In a recent year, a letter to Europe from the United States cost $0.94 to mail. A letter mailed within the United States costs $
Ilya [14]

Answer:

She mailed 3 to Europe

Step-by-step explanation:

0.94 x 3=2.82

0.44 x 2=0.88

2.82 + 0.88=3.70

8 0
3 years ago
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