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4 years ago

50 POINTS!!!! PLEASE HELP

Mathematics

2 answers:

Nady [450]4 years ago

5 0

Answer:

Step-by-step explanation:

Is it ok?

I only typed the values, if you want explation I can help you.

snow_lady [41]4 years ago

5 0

1. this is saying, when x is 6, what is the value of you. f(x) is y

y=3(6)-5

y=18-5

y=13

Answer is 13

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What is the simplified form of 20 times x to the sixth power over 15 times y to the fifth power times the fraction 5 times y squ

Delvig [45]

In order to easily picture out the operation involving fractions, let's write it in an algebraic equation. So, the above description is written as

20x⁶/15y⁵ × 5y²/6x⁴

The first thing to do is to simplify the easiest terms: the constants. Just multiply all the constants on the numerator and all the constants on the denominator independently. The simplified constant becomes

(20*5)/(15*6) = 10/9

So, the equation to be solved now is

10x⁶y²/9y⁵ x⁴

So, I also multiplied all the variables in the numerator and denominator independently, just like the constants. Then, you apply the laws of exponents. When you divide terms with exponents of the same value of the base, you subtract the exponent on the numerator minus the denominator. It goes like this:

10/9 * x⁶⁻⁴*y²⁻⁵ = 10/9*x²y⁻³

Now, when the exponent as written to the power of a negative exponent, just simply take its reciprocal to make it positive. So, the final answer is

10x²/9y³ or that is letter D.

8 0

4 years ago

If a spinner is spun 5 times then each event is independent <br><br> True or false?

steposvetlana [31]

Answer:

True

Step-by-step explanation:

Each time a spinner is spun, there is an equal chance that each result will occur, thus each of these spins are independent.

8 0

3 years ago

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Identify the conic that is formed by the intersection of the plane described and the double-napped cone.

Lelu [443]

Answer:

C. Parabola

Step-by-step explanation:

A line parallel will cut only one cone (upper or lower cone, not both) making it a parabola

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3 years ago

Three potential employees took an aptitude test. Each person took a different version of the test. The scores are reported below

kondaur [170]

Answer:

Due to the higher z-score, Norma should be offered the job

Step-by-step explanation:

Z-score:

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

Whoever has the higher z-score should get the job.

Norma:

Norma got a score of 84.2; this version has a mean of 67.4 and a standard deviation of 14.

This means that $X = 84.2 \mu = 67.4, \sigma = 14$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{84.2 - 67.4}{14}$

$Z = 1.2$

Pierce:

Pierce got a score of 276.8; this version has a mean of 264 and a standard deviation of 16.

This means that $X = 276.8, \mu = 264, \sigma = 16$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{276.8 - 264}{16}$

$Z = 0.8$

Reyna:

Reyna got a score of 7.62; this version has a mean of 7.3 and a standard deviation of 0.8.

This means that $X = 7.62, \mu = 7.3, \sigma = 0.8$

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{7.62 - 7.3}{0.8}$

$Z = 0.4$

Due to the higher z-score, Norma should be offered the job

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4 years ago

A ball is rolling at 4.80m/s over level ground when it encounters a ramp, which gives it an acceleration of -0.875m/s^2. If the

Yuri [45]

Given that the ball was rolling with an initial velocity of 4.80 m/s, when it encountered the ramp.

Given that the accerelation with which it rolled over the ramp was $-0.875 m/s^2$ and that the ranp is 0.750 m long.

The final velocity of an object with an initial velocity, u, with an accerelation, a, moving through a distance, s is given by

$v^2=u^2+2as$

Thus, the <span>final velocity of the ball when it reaches the top of the ramp is given by

$v^2=(4.80)^2+2(-0.875)(0.750) \\ \\ =23.04-1.3125=21.7275 \\ \\ \Rightarrow v=\sqrt{21.7275}=\bold{4.66 \ m/s}$ </span>

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3 years ago

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