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3 years ago

PLEASE HELP ITS THE LAST THING I NEED HELP WITH FOR THIS YEAR!

Mathematics

2 answers:

Pie3 years ago

6 0

Since you're putting the red card back in the deck, it doesn't matter what you draw, as it is trying to confuse you. There are 13 heart cards in a deck, so 13/52

irinina [24]3 years ago

3 0

The answer to ur question is
p(getting a heart card)=13/52=1/4

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A triangle has sides with lengths of 7 miles, 7 miles, and 9 miles. Is it a right triangle yes or no

evablogger [386]

Answer:

Step-by-step explanation:

6 0

4 years ago

What is the unit rate for the proportional relationship represented by the equation y=4/5x

ANEK [815]

Answer:

A: 4/5

Step-by-step explanation:

The equation for proportionality is y = kx, where k is the constant of proportionality. That is what you're looking for in this question.

So in y = 4/5x, 4/5 is the constant of proportionality/unit rate for the proportional relationship.

7 0

3 years ago

Two candidates face each other in an election. The Democratic candidate is supported by 46% of the population, and the Republica

7nadin3 [17]

Answer:

27.98% probability that less than half of them (3 or fewer) would support the Republican candidate

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they support the Republican candidate, or they do not. The people are chosen at random, which means that the probability of them supporting the republican candidate is independent from other people. So we use the binomial probability distribution to solve this problem.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

In this problem we have that:

The Republican candidate is supported by 54%. This means that $p = 0.54$

Suppose you run a poll of 8 people (randomly choose 8 people). What is the probability that less than half of them (3 or fewer) would support the Republican candidate?

This is $P(X \leq 3)$ when $n = 8$ .

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 0) = C_{8,0}.(0.54)^{0}.(0.46)^{8} = 0.0020$

$P(X = 1) = C_{8,1}.(0.54)^{1}.(0.46)^{7} = 0.0188$

$P(X = 2) = C_{8,2}.(0.54)^{2}.(0.46)^{6} = 0.0774$

$P(X = 3) = C_{8,3}.(0.54)^{3}.(0.46)^{5} = 0.1816$

$P(X \leq 3) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) = 0.0020 + 0.0188 + 0.0774 + 0.1816 = 0.2798$

27.98% probability that less than half of them (3 or fewer) would support the Republican candidate

3 0

3 years ago

How long would it take?

lutik1710 [3]

To find how long it would take, you must divide the total amount of gallons of water in the pond by the amount of gallons drained per hour. This would translate to:

4290 ÷ 78

Which would give you the total amount of hours needed to completely drain the pool, aka the answer:

4290 ÷ 78 = 55

8 0

4 years ago

The following list shows the items and prices for a restaurant order. Calculate the total amount if there is a 7% tax and the cu

laiz [17]

The total amount for food and drinks is: $51.26
The 7% tax is: 51.26 * 0.07 = $3.5882
The 20% tip is: 51.26 * 0.2 = $10.252

Your total amount is: 51.26 + 3.5882 + 10.252 = $65.1002 or rounded $65.10
Hope this helped!
Please Mark as brainliest answer if you can!

8 0

4 years ago

Read 2 more answers