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3 years ago

6

ewan makes chess boards from wood each bored has 3 different kinds of wood he has 5 kinds of wood in his workshop maple cherry w

alnut poplar and birch how many different types of chess board can he make

2 answers:

salantis [7]3 years ago

7 0

He can make 15 chess boards.

All you need to do is multiply 3 by 5.

lina2011 [118]3 years ago

7 0

Answer: 10 types

Step-by-step explanation:

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if the store purchased a kitchen appliance for $42 and sold it for $58.80, what was the percent markup?

oksano4ka [1.4K]

Answer:

40%

Step-by-step explanation:

Percent markup = new price - original price/original price

Do the subtraction first.

58.80 - 42.00 = 16.80

Now do the division

16.8/42 = 0.40

Change the decimal to a percent by moving the decimal two place to the right.

0.40 = 40%

6 0

2 years ago

The length of each side of a triangle is increased by 30%. By what percentage is the area increased?

patriot [66]

Answer:

When sides are doubled, the area of new triangle will always be 4 times the original, the change in area will be 3 times. Hence the % change will always be 300% irrespective of the type of triangle.

Step-by-step explanation:

5 0

3 years ago

Find the recursive formula.<br> 8, 12, 16, 20, ...

ArbitrLikvidat [17]

First term, a
1

=4
Second term, a
2

=8
Common difference, d=a
2

=a
1

d=8−4=4
∴ The common difference is 4

7 0

3 years ago

Which of these ordered pairs is a solution to the inequality

bezimeni [28]

Answer:

(1, -1)

Step-by-step explanation:

If you replace y and x with (1 and -1) you have -1 - 2^1 < -3

And that equals -3 if solved. The sign says equal to or less than, so you answer is (1, -1)

7 0

3 years ago

For a binomial process, the probability of success is 40 percent and the number of trials is 5. Find the standard deviation.

Yakvenalex [24]

Answer:

$Sd(X) =\sqrt{1.2}=1.095$

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

$X \sim Binom(n=5, p=0.4)$

The probability mass function for the Binomial distribution is given as:

$P(X)=(nCx)(p)^x (1-p)^{n-x}$

Where (nCx) means combinatory and it's given by this formula:

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

The mean for the binomial distribution is given by:

$E(X) =np=5*0.4=2$

And the variance is given by:

$Var(X) = np(1-p) =5*0.4*(1-0.4)=1.2$

And the deviation is just the square root of the variance so we got:

$Sd(X) =\sqrt{1.2}=1.095$

7 0

3 years ago