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Mumz [18]
2 years ago
9

Christina buys 3 DVDs . 2 of the DVDs cost X+Y . Write an expression that shows the amount the 3 DVDs cost

Mathematics
2 answers:
kumpel [21]2 years ago
8 0

Answer:

= 3(x + y)/2

Step-by-step explanation:

Cost of two DVD's is shown as :-

= x + y

If we divide by 2 we'll get the cost of each DVD

= (x + y)/2

Then, multiplying by 3 gives us the total amount.

= 3(x + y)/2

-BARSIC- [3]2 years ago
7 0

Answer:

3/2(x+y)

Step-by-step explanation:

The cost of 2 DVD is x+y

Divide by 2 to get the cost of one DVD

(x+y) /2

Multiply by 3 to get the cost of 3

3/2(x+y)

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In hypothesis testing, if the null hypothesis has been rejected when the alternative hypothesis has been true, _____. a. a Type
lara31 [8.8K]

Answer:(c)

Step-by-step explanation:

Given : In a hypothesis testing the null hypothesis has been rejected when the alternative hypothesis has been true.

Find : to find that the given decision is create type I error , type II error or right decision has been taken

Step by step :

In hypothesis testing there are 2 types of error.

(1)Type I error :- if the null hypothesis is rejected when it is true, is known has Type I error .

(2)Type II error:- if the null hypothesis is accepted when alternative hypothesis is true, is known as type II error.

Since here null hypothesis has been rejected when alternative hypothesis has been true,i.e., the correct decision has been made

Hence option (c) is correct.

4 0
3 years ago
PLS HELP ITS A MAJOR GRADE AND DUE TOMORROW
Alexus [3.1K]

Answer:

*See below*

Step-by-step explanation:

<u>Identify and Explain Error</u>

The method shown is using fractions to compare costs. This strategy does not work due to the fact that they have not factored in the $55 he pays for the car before hand. Also, 150 divided by 0.5 does not equal 30, it equals 300 so, even if he did not pay $55 beforehand, the equation is still incorrect.

<u>Correct Work/Solution</u>

$55 to rent

$0.50 per mile

Let's start by removing $55 from $150 to see how many dollars is left over for gas.

150 - 55 = 95

Then, divide 95 by 0.5

95 ÷ 0.5 = 190

He can drive at least 190 miles.

<u>Share Strategy</u>

Since he starts off paying $55 dollars out of $150, we need to subtract $55 by $150 to see how much cash he has left over for mileage. $150 minus $55 equals $95 so, he has $95 left over for mileage. $95 will then be divided by $0.50 to find out how many miles he can drive. We are dividing by $0.50 because that's the cost per mile. $95 divided by $0.50 equals 190 so he can drive at least 190 miles.

Note:

Hope this helps :)

Have a great day!

7 0
2 years ago
The air temperature is −6℃ at sunrise and rises 4℃ every hour for several hours. The air temperature after x hours after sunrise
Nezavi [6.7K]

Answer:

Step-by-step explanation:

F(x)=4x-6

It will start at -6C and every hour we will be going up by 4

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2 years ago
A cylindrical water tank is being filled with a hose. The depth of the water increases by 1/14 ft per hour. How many hours will
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Seven is your answer
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3 years ago
What is the approximate value for 683 divided by 19? <br> A. 20<br> B. 26<br> C. 30<br> D. 36
atroni [7]

The  \:  \:  \:  \: approximate \\  value \:  \:  \:  \:  for  \:  \:  \:  \: 683  \\ divided  \:  \:  \:  \:  by  \:  \:  \:  \: 19 \\  is \:  \:  \:  \:  option \:  \:  \:  \:  D. 36

5 0
2 years ago
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