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MArishka [77]
3 years ago
15

When evaluated, which expression has a result that is a rational number?

Mathematics
1 answer:
emmainna [20.7K]3 years ago
5 0

Answer:

√144 * 0.25 is rational!

Step-by-step explanation:

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Anais bought 2 1/2 yards of ribbon. She had 1 foot 6 inches of ribbon left after trimming some curtains. How many inches of ribb
vlada-n [284]
2 1/2 yards = 7.5 ft
1 foot and 6 inches = 1.5 ft
7.5-1.5 = 6
6 ft = 72 inches
Anais used 72 inches of ribbon.
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3 years ago
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Plz help 20+ points<br> I’m so confused... :(
Brrunno [24]

Answer:

No image has appeared

Step-by-step explanation:

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3 years ago
A Tom bought these 3 t shirts at the sale price of $ 14. 50. How much money did he save compared to the original total of the t
lidiya [134]

Answer:

$2.47

14.6%

Step-by-step explanation:

Total of the original prices:

$3.99 + $6.99 + $5.99 = $16.97

He paid $14.50 for the 3 shirts.

$16.97 - $14.50 = $2.47

He saved $2.47.

The percent he saved is

2.47/16.97 × 100% = 14.6%

5 0
2 years ago
What is the inverse of the function h(x)=\dfrac{5}{2}x+4h(x)= 2 5 ​ x+4h, left parenthesis, x, right parenthesis, equals, start
Phantasy [73]

Answer:

The inverse of the function h(x) is h^{-1}(x)=\frac{2}{5}x-\frac{8}{5}.

Step-by-step explanation:

The given function is

h(x)=\dfrac{5}{2}x+4

Replace h(x) by y.

y=\dfrac{5}{2}x+4

Interchange x and y.

x=\dfrac{5}{2}y+4

Subtract 4 from both sides to isolate variable y,

x-4=\dfrac{5}{2}y

Multiply both sides by 2.

2x-8=5y

Divide both sides by 5.

\frac{2}{5}x-\frac{8}{5}=y

Replace y by h⁻¹(x).

h^{-1}(x)=\frac{2}{5}x-\frac{8}{5}

Therefore the inverse of the function h(x) is h^{-1}(x)=\frac{2}{5}x-\frac{8}{5}.

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3 years ago
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According to a study conducted by an​ organization, the proportion of americans who were afraid to fly in 2006 was 0. 10. A rand
algol13

According to the the concept of hypothesis testing, there is no evidence that the proportion of Americans who are afraid to fly has decreased.

Hypothesis testing:

Basically, in math hypothesis, it test the population on the basis of the sample data taken from the population using a simple random sampling.

Given,

According to a study conducted by an​ organization, the proportion of Americans who were afraid to fly in 2006 was 0. 10. A random sample of 1300  Americans results in 117 indicating that they are afraid to fly.

Now, we need to explain why this is not necessarily evidence that the proportion of Americans who are afraid to fly has.

While we looking into the given question,

Sample size, n = 1300

Number of Americans who were afraid to fly, x = 117

Now, we have to computing the sample proportion of Americans who afraid to fly,

Therefore, p = 117 / 1300 = 0.09

Then the Formulation of Hypotheses is written as,

Here the Null Hypothesis: H0: p≥0.10

And the alternative Hypothesis: Ha: p<0.10

Then the Left-tailed test of Test statistic is written as,

Here Let us assume that the level of significance, α = 0.05.

Then the Critical value, z≈−1.645

And the Decision rule is written as

If the value of  |z|<|z0.05|≈1.645: Do not reject the null hypothesis.

Otherwise If value of  |z|≥|z0.05|≈1.645: Reject the null hypothesis.

To know more about Hypothesis testing here.

brainly.com/question/28920252

#SPJ4

5 0
10 months ago
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