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3 years ago

1\4 divides by 3/8 plz help

2 answers:

8 0

With experience you'll learn to see quickly what the LCD should be in situations like this. Here, 1/4 becomes 2/8, which has the same denominator as does 3/8.

Dividing 2/8 by 3/8 results in 2/3; the "8" in each of the two fractions cancels.

miskamm [114]3 years ago

5 0

$\bf \cfrac{1}{4}\div \cfrac{3}{8}\implies \cfrac{1}{4}\cdot \cfrac{8}{3}\implies \cfrac{8}{4}\cdot \cfrac{1}{3}\implies \cfrac{2}{1}\cdot \cfrac{1}{3}\implies \cfrac{2}{3}$

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Which pair of triangles are congruent by ASA ?

NNADVOKAT [17]

Answer:

A,D

Step-by-step explanation:

ASA or "angle-side-angle" tells us that two triangles are congruent if two angles and the side contained between them are equal. Hence, we are looking for two angles that coincide in echa triangle, this is the case for the triangles in a. and b., and that the side that lies between the two angles is also equal in both triangles, again this is the case for a. and b.

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A wire bonding process is said to be "in control" if the mean pull strength is 10 pounds. It is known that pull-strength measure

Degger [83]

Answer:

B. 0.0099

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are 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.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this roblem, we have that:

$\mu = 10, \sigma = 1.5, n = 4, s = \frac{1.5}{\sqrt{4}} = 0.75$

Probability of being out of control.

Less than 8.25 pounds, which is the pvalue of Z when X = 8.25. So

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

By the Central Limit Theorem

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

$Z = \frac{8.25 - 10}{0.75}$

$Z = -2.33$

$Z = -2.33$ has a pvalue of 0.0099.

So the correct answer is:

B. 0.0099

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RADIO TELESCOPES The cross section of a large radio telescope is a parabola. The equation that describes the cross section is y=

Minchanka [31]

Answer:

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Step-by-step explanation:

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qaws [65]

Answer:

m<1=1/2 216 =108

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Vladimir79 [104]

Answer:

This entry deals with the congruence of polygons in general. Congruent triangles are discussed in more depth in Congruent Triangles. Polygons are congruent if they are equal in all respects: 1. Same number of sides 2. All corresponding sides are the same length

Step-by-step explanation:

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