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3 years ago

Select Proportional or Not Proportional to correctly classify each pair of ratios.

Mathematics

2 answers:

emmasim [6.3K]3 years ago

5 0

Answer:

Proportional

Step-by-step explanation:

Let's test this out. So for example you have the fractions: 12/30 and 18/?

Let's solve for ?

12 - 18

30 - ?

Solve: 30×18÷12=45

In the problem it also said 45 on the bottom, so yah they are proportional.

Minchanka [31]3 years ago

3 0

Proportional

Step-by-step explanation:

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Which decimal is equivalent to 6×100+7×10+4×1/10+8×1/1,000

Snezhnost [94]

The answer is 670.408, because 6x100=600, 7x10=70, 4x1/10 as a decimal is 0.4, 8x1/1,000 as a decimal is 0.008. Then, you add all of those $600+70+0.4+0.008=670.408$ .

8 0

3 years ago

The fractions 10/12 and 5/24 are equivalent fractions.<br> True or False

Nadusha1986 [10]

Answer:

No they aren't smh

Step-by-step explanation:

10/12 * 2 = 20/24 not 5/24 so not true

4 0

3 years ago

Read 2 more answers

Taylor graphs the system below on her graphing calculator and decides that f(x)=g(x) at x=0, x=1, and x=3. Provide Taylor some f

goblinko [34]

Answer:

$f(x)=g(x)$ at x= 0 and x= 1 and not at x= 3.

Step-by-step explanation:

We have the functions, $f(x)=2x+1$ and $g(x)=2x^2+1$ .

It is given that,

At x=0, x=1, and x=3, $f(x)=g(x)$

i.e. $2x+1=2x^2+1$

i.e. $2x^2-2x=0$

i.e. $2x(x-1)=0$

i.e. x= 0 and (x-1)= 0

i.e. x= 0 and x= 1.

Also, after plotting the graphs of both the functions, we see their intersection point are (0,1) and (1,3).

Thus, we get that $f(x)=g(x)$ at x= 0 and x= 1 and not at x= 3.

5 0

3 years ago

(t-distribution) A manufacturing firm claims that the batteries used in laptop computers will last an average of 50 months. To m

statuscvo [17]

Answer:

There is an 38.21% probability that we find this lifespan for our sample average, or something even shorter.

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:

A manufacturing firm claims that the batteries used in laptop computers will last an average of 50 months. This means that $\mu = 50$ .

We found that the sample had a average lifespan of 47.3 months, and a standard deviation of s = 9 months. What is the probability that we find this lifespan for our sample average, or something even shorter?

We have to find the pvalue of Z when $X = 47.3$ .