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lorasvet [3.4K]
2 years ago
13

Which of the following values are zeros of x(x+5)(x-3)?

Mathematics
1 answer:
Lemur [1.5K]2 years ago
5 0

Answer:

The expression evaluates to zero when x = 0, -5, or 3

Step-by-step explanation:

As all three terms are multiplied together, only one of them needs to equal zero for the expression as a whole to do so.

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the mean of normally distributed test scores is 80 and the standard division is 5. If there are 186 test scores in the data samp
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Answer:

63

Step-by-step explanation:

score 75 is one standard dev below the mean ====>to the mean  encompasses approx 34% of scores

.34 * 186 = 63

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2 years ago
What are the solution(s) of x squared minus 4 = 0? x = negative 4 or x = 4 x = negative 2 or x = 2 x = 2 x = 4
frosja888 [35]

Answer:

Step-by-step explanation:

The expression is

x^2 - 4

This is a quadratic expression.

To find the solution, we will equate the the expression to zero. It becomes

x^2 - 4 = 0

Add 4 to the left hand side of the equation and the right hand side of the equation. It becomes.

x^2 - 4 + 4 = 0 + 4

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Take square root of the right hand side of the equation and left hand side of the equation. It becomes

√x^2 = √4

x = ± 2

x = 2 or x = - 2

7 0
3 years ago
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Step-by-step explanation:

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<span>Look at your table for a Z value of 1.55. The numbers on the far left column are your z values. See the 1.5 row, then move over to the 0.05 column to make it 1.55.
You'll see 0.9394.
That's the area under the normal curve from 1.55 to negative infinity.
But you wanted the area under the curve greater than 1.55.
Take 1-0.9394=0.0606.
You subtract from 1 because you know that the area under the whole curve is 1, so it gives you the area you need.</span>
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3 years ago
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Answer:

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Step-by-step explanation:

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