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3 years ago

Simplify the expression x5 • x7.

Mathematics

2 answers:

Marizza181 [45]3 years ago

8 0

Answer:

x^12

Step-by-step explanation:

When multiplying exponents, the rule below is followed.

$x^a * x^b= x^{a+b}$

Basically, the base remains the same, but the numbers in the exponents are added.

We are given:

$x^5*x^7$

We leave the base (x)as is, and add the numbers in the exponents (5 and 7).

$x^5*x^7\\$

$x^{5+7$

$x^{12}$

The expression $x^5*x^7\\$ can be simplified as: $x^{12{$

Blababa [14]3 years ago

4 0

Answer:

x12

Step-by-step explanation:

When multipling numbers that are the same with exponent you can just add the exponents.

so x5*x7=x12

(It would be subtraction if there was division)

Hope this helped you and feel free to ask questions!

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frutty [35]

Answer:

0% probability cab tires depths would be shallower than 0.25cm.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

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 problem, we have that:

$\mu = 2.2, \sigma = 0.33$

What is the probability cab tires depths would be shallower than 0.25cm.

This probability is the pvalue of Z when X = 0.25. So

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

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