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4 years ago

To find the value of an algebraic expression is what?

Mathematics

1 answer:

Mashutka [201]4 years ago

6 0

Algebraic expression means Letter Can stand for numbers. Ex: 2y+5 and Y=10

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The probability distribution histogram shows the number of days a book is checked out of the library. What is P(9≤X<18)?

aleksley [76]

Answer:

$p(9\leq{X}\leq{18})=0.6$

Step-by-step explanation:

The probability distribution provides the probabilities of occurrence of different possible outcomes, in this case we want to know what is the probability that the variable X takes any value between 9 and 18.

The probability of occurrence is shown in the vertical axis of the graph. We want to know what is the probability of finding values of X between 9 and 18, then we should add up the probabilities between these two values , which means adding $P(9\leq{X}\leq {12})+P(12\leq{X}\leq {15})+P(15\leq{X}\leq {18}) = 0.15+0.30+0.15=0.6$

4 0

4 years ago

Over the course of a week, an environmental activist randomly stopped 1,200 people on the street and asked whether they were wil

sdas [7]

Sample Size = n = 1200
Number of people who are willing to pay higher = x = 708

Proportion of people who are willing to pay higher = p = $\frac{708}{1200}= \frac{59}{100}=0.59$

Confidence Level = 99%
Z Value = z = 2.58

The confidence interval about a population proportion can be calculated as:

$(p-z \sqrt{ \frac{p(1-p)}{n} }, p+z \sqrt{ \frac{p(1-p)}{n} })$

Using the values, we get:

$(0.59-2.58 \sqrt{ \frac{0.59(0.41)}{1200} } ,0.59+2.58 \sqrt{ \frac{0.59(0.41)}{1200} }) \\ \\ 
(0.553,0.627)$

Thus, at 99% confidence level, the estimated proportion of people willing to pay higher prices for gas in order to protect the environment lies between 0.553 and 0.627.

6 0

3 years ago

Read 2 more answers

The circumference of a circle is 9.45cm.

Fudgin [204]

Answer:

D = 3 cm

Step-by-step explanation:

Given that,

The circumference of a circle is 9.45cm.

We need to find the length of the diameter.

The formula for the circumference of a circle is given by :

$C=2\pi r$

We know that, Diameter = 2r

So,

$C=D\pi\\\\D=\dfrac{C}{\pi}\\\\D=\dfrac{9.45}{\pi}\\\\D=3\ cm$

So, the length of diameter is equal to 3 cm.

8 0

3 years ago

By running the same software on a computerthat is 40% faster, how many more frames per second can be displayedthan on the slower

labwork [276]

Answer:

Step-by-step explanation:

Let the current display rate be f (in frames per second). If the new computer is 40% faster, then the new display rate will be 1.40f (frames per second).

8 0

3 years ago

On Saturday, Nikki and Tyler walked to the local farmer's market. Nikki bought 8 apples for $6. Tyler bought 3 fewer apples than

andriy [413]

$3.75 because each apple costs 75 cents and if you multiply it by 5 you get 3.75

7 0

3 years ago

Read 2 more answers