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alexandr402 [8]
3 years ago
13

David is looking for the best deal on a laptop that regularly costs $719. Help him compare the price of the laptop at a

Mathematics
1 answer:
NemiM [27]3 years ago
6 0

Answer:

A) $287.60.

B) $323.55.

C) David would pay more for the laptop at the store.

Step-by-step explanation:

A) Given that the store's website is offering the laptop at a 60% discount off the regular price of $ 719, ignoring tax and shipping, the sale price is obtained through the following calculation:

100 - 60 = 40

719 x 0.40 = X

287.6 = X

Therefore, in this case the sale price would be $ 287.6.

B) Since the store is having a sale, offering a 50% discount off the regular price of the laptop, and David also has an in-store-only coupon for an additional 10% off the sale price, ignoring tax, the price of sale is obtained through the following calculation:

(719 x 0.5) x 0.9 = X

359.5 x 0.9 = X

323.55 = X

Thus, the sale price in the present case would be $ 323.55.

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A contractor has submitted bids on three state jobs: an office building, a theater, and a parking garage. State rules do not all
german

Answer:

The following are the answer to this question:

Step-by-step explanation:

In the given question the numeric value is missing which is defined in the attached file please fine it.  

Calculating the probability of the distribution for x:

\to f(x) = 0.19\  for \ x=14\\\\\to  f(x) = 0.29 \ for\ x=7\\\\\to f(x) = 0.38\  for \ x=1\\\\\to f(x)=0.14 \ for \ x=0\\

The formula for calculating the mean value:

\bold{ E(X)= x \times f(x)}

          =14 \times 0.19+7 \times 0.29+1 \times 0.38+0\times 0.14\\\\=2.66 + 2.03+0.38+ 0\\\\=5.07

\bold{E(X^2) = x^2 \times f(x)}

           =14^2 \times 0.19+7^2 \times 0.29+1^2 \times 0.38+0^2 \times 0.14 \\\\=196 \times 0.19+ 49 \times 0.29+1 \times 0.38+0 \times 0.14\\\\= 37.24+ 14.21+ 0.38+0 \\\\=51.83

use formula for calculating the Variance:

\to \bold{\text{Variance}= E(X^2) -[E(X)]^2}

                  = 51.83 - (5.07)^2\\\\= 51.83 -  25.70\\\\=26.13

calculating the value of standard deivation:

Standard Deivation (SD) = \sqrt{Variance}

                                          = \sqrt{26.13} \\\\=5.111

6 0
3 years ago
I WILL GIVE U BRAINLIEST AND THANKS AND 5 STARS
Damm [24]

Answer:

or what does it mean that eu only portuguese phallus translate for portuguese please

8 0
3 years ago
Read 2 more answers
Any help with this question please?
taurus [48]

Answer:

B.a=b, c≠0

C.a=b, c=0

D.a-b=1, c≠1

Step-by-step explanation:

The equation given is c = ax - bx. We can factor the right-hand side to obtain an equivalent equation which is c = (a-b)x

Let’s explore each answer choice given. We are looking for cases where there is no one solution for the equation.

A

a-b = 1 so the right-hand side becomes 1x and we have x=c. Since c is 0 we have one solution that is x=0

B

a=b so a-b =0 and the equation becomes 0=c but the answer choice says c does not equal zero. So in this case there is no solution. This is a correct answer to the problem.

C

This is the same as choice B but since C =0 both sides of the equation equal zero. We get 0=0 but notice that this is true no matter what the value of x is so this equation is called identity and any value of x will do so there isn’t one solution but rather infinitely many. This is another right answer.

D

Here a-b=1 so we end up with x = c and since c doesn’t equal one any value of x except 1 is a solution so there isn’t one solution but infinitely many. This too is an answer to the question.

E

Since a doesn’t equal b and since c = 0 we have (a-b)x = 0 so. Either a-b is zero but since a and b are different this can’t be or x is zero. This there is one solution: x=0.

<em>From the above, the answer to the question is choices </em><em>B, C, and D</em>

8 0
3 years ago
Technology required. A function f gives the number of stray cats in a town t years since
8090 [49]

This means that the number of stray cats in a town when the town started the animal control program is 729.

<h3>Exponential function</h3>

An exponential function is given by:

y = abˣ

Let y, x are variables, a is the initial value and b is the multiplication factor.

Where f is the number of stray cats in a town t years since the town started an animal control program.

Since f(t) = 729(\frac{1}{3} )^t

f(0) = 729(1/3)° = 729

This means that the number of stray cats in a town when the town started the animal control program is 729.

Find out more on Exponential function at: brainly.com/question/12940982

4 0
2 years ago
How do you multiply and divide decimals ?
valina [46]
Multiplying Decimals

If you already know how to multiply, then multiplying decimals will be easy, there is just one extra step you need to take.
First, you multiply the numbers just like normal, as if the decimal point wasn't there.
Next, you need to add in the decimal point to the answer. This is the only tricky part. You add up the decimal places there are in the numbers you multiplied. Then you put that many decimal places in the answer.
Let's try some examples:

1) 4.22 x 3.1 = ?

If you first just multiply 422 x 31 you get

422
x 31
13082


Now, there are 2 decimal places in 4.22 and 1 decimal place in 3.1. This is a total of 3 decimal places. We then put three decimal places in 13082 and we finally get the answer:

13.082

1) 4.220 x 3.10 = ?

To show how the decimal part works, we'll solve the same problem again, but this time we will add a zero to the right of each number we multiply. This doesn't change the value of the numbers, so it shouldn't change the answer we get.

First we multiply without worrying about the decimals:

4220
x 310
1308200


Now, we count the total amount of decimals. There are 5 total decimals places this time. If we count over 5 decimal places from the end of 1308200 we get the same answer:

13.08200

Note: the extra zeros to the right of the decimal point do not change the value of the number.

Dividing Decimals

When you are dividing a number with a decimal point by a whole number, dividing decimals is pretty simple.
Divide the number as you normally would, using long division.
Bring the decimal point directly up from the dividend.
Example:

9.24 ÷ 7 = ?



If both divisor and dividend are decimals:

If the divisor is a decimal number rather than a whole number, then you need to take an extra step. In this step you convert the divisor from a decimal number to a whole number. You do this by moving the decimal point to the right in the divisor until there are no more numbers other than zero to the right of the decimal point. Then you move the decimal point to the right the same number of places in the dividend.

Example of moving the decimal point for division:

9.24 ÷ 7.008

You want the divisor 7.008 to be a whole number, so you need to move the decimal point 3 places to the right:

7008

Now you need to move the decimal point for the dividend 3 places to the right:

9240

In this case you have to add a zero to move it 3 places.

Now you divide 9240 by 7008 to get the answer:

Example:

0.64 ÷ 3.2 = ?

First move the decimal points so the divisor is a whole number:

6.4 ÷ 32 = ?



Important things to remember:
Move the decimal point directly up in your long division.
Always move the decimal points on BOTH to divisor and the dividend to where the divisor is a whole number.

hope this helps!! tell me if you need more assistance!!
7 0
3 years ago
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