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3 years ago

7

A box is to be wrapped in a shiny pink decorative paper. The box is o inches long, 5 inches wide, and 4 Inches high. What is the

minimum amount of decorative paper needed to cover the box?

1 answer:

Oksanka [162]3 years ago

7 0

Answer:

20 inches

Step-by-step explanation:

Because the volume of the box is 20.

Correct me if im wrong and please wait for more responses if needed please.

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Solve for k 5/8(3k+1)-1/4(7k+2)=1

lesya [120]

Answer:

<h2>k = 7</h2>

Step-by-step explanation:

$\dfrac{5}{8}(3k+1)-\dfrac{1}{4}(7k+2)=1\qquad\text{multiply both sides by 8}\\\\8\!\!\!\!\diagup^1\cdot\dfrac{5}{8\!\!\!\!\diagup_1}(3k+1)-8\!\!\!\!\diagup^2\cdot\dfrac{1}{4\!\!\!\!\diagup_1}(7k+2)=8\cdot1\\\\5(3k+1)-2(7k+2)=8\qquad\text{use the distributive property}\ a(b+c)=ab+ac\\\\(5)(3k)+(5)(1)+(-2)(7k)+(-2)(2)=8\\\\15k+5-14k-4=8\qquad\text{combine like terms}\\\\(15k-14k)+(5-4)=8\\\\k+1=8\qquad\text{subtract 1 from both sides}\\\\k=7$

3 0

3 years ago

There are 16 girls and 18 boys in a class. The teacher chooses a student's name at random to answer a question.

olga2289 [7]

Answer:

It would be 1/34 or 1/16.

Step-by-step explanation:

Add up how many kids there are in total and then see how many girls there are and write it like this: 18/34. Since it says a girl then you would do it as 1/34 or 1/16 it depends on how you look at it and or how you understand what the question is talking about.

3 0

3 years ago

Y=4x+rx+6 solve for x

Irina-Kira [14]

$y=4x+rx+6$

$y-6=4x+rx

$ $Subtract \ 6 \ from \ both \ sides$

$y-6=x(4+r)

 
$ $Factor \ out \ the \ common \ term \ x$

$\dfrac{y-6}{4+r} =x$ $Divide \ both \ sides \ by \ 4+r$

5 0

3 years ago

In order to determine whether or not there is a significant difference between the mean hourly wages paid by two companies (of t

dybincka [34]

Test statistic = (mean 1 - mean 2) / sqrt( dev1/n1 + dev2/n2)

Mean 1 = $16.75

mean2 = $16.25

dev1 = $1.00

dev2 = $0.90

n1 = 80

n2 = 60

Test stat = (16.75 - 16.25) / sqrt(1/80 + 0.95/60)

Test stat = 3.01

The answer is B. 3.01

8 0

3 years ago

URGENT❗❗❗❗❗❗Elina is gathering up change she has saved. She has a total of $2.60. All of her change is in either nickles, dimes,

oee [108]

Let the number of nickels be = x

Let the number of dimes be = d

Let the number of quarter be = n

Given is, she has twice as many dimes as quarters

d=2n or n = 0.5d

She has two less quarters than nickles.

n= x-2 or

x= n+2

Total values of coins is = $2.60

$0.05x+0.10d+0.25n=2.60$

Now replace x with (n+2) and d with 2n

$0.05(n+2)+0.10(2n)+0.25n=2.60$

$0.05n+0.10+0.20n+0.25n=2.60$

$0.50n+0.10=2.60$

$0.50n=2.50$

$n=5$

Now x=n+2 ; x=5+2 = 7

d=2n ; d=2(5) = 10

Hence, Elina has 7 nickels, 10 dimes and 5 quarters.

3 0

3 years ago