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3 years ago

Laura wants to cover a box with fabric.

Mathematics

2 answers:

vladimir2022 [97]3 years ago

7 0

Answer:

1968 in

Step-by-step explanation:

times the width and height, then times the answer by 2.

times the length and height, then times the answer by 4.

add both answers

you get 1968in

Alborosie3 years ago

7 0

Answer:

hey so the answer is 1,578 inches square

Step-by-step explanation:

You might be interested in

What is x in 2x + 5x

adell [148]

Answer:

in this question is hard to identify the value of x when it is not equated to a number so hey you'll just have to add to get 7 x

6 0

3 years ago

Could someone please help me?

SpyIntel [72]

Answer:

ab=9 and ac=12

Step-by-step explanation:

3 0

3 years ago

Find domain of y=rad20-6x

Evgesh-ka [11]

Domain, on an "even root" context, means, an even root cannot have a negative radicand, since say for example $\bf \sqrt{-25}\ne -5\qquad why?\implies (-5)(-5)=25$

so... you end up with an "imaginary value"

so... for the case of 20-6x
"x", the domain, or INPUT
can afford to have any value, so long it doesn't make the radicand negative

to check for that, let us make the expression to 0, and see what is "x" then

$\bf 20-6x=0\implies 20=6x\implies \cfrac{20}{6}=x\implies \cfrac{10}{3}=x$

now, if "x" is 10/3, let's see $\bf \sqrt{20-6\left( \frac{10}{3} \right)}\implies \sqrt{20-20}\implies \sqrt{0}\implies 0$

now, 0 is not negative, so the radicand is golden

BUT, if "x" has a value higher than 10/3, the radicand turns negative
for example $\bf x=\frac{11}{3}
\\\\\\

\sqrt{20-6\left( \frac{11}{3} \right)}\implies \sqrt{20-22}\implies \sqrt{-2}$

so.. that's not a good value for "x"

thus, the domain, or values "x" can safely take on, are all real numbers from 10/3 onwards, or to infinity if you wish

5 0

3 years ago

the perimeter of a rectangle is 48 inches. the ration of the width the length is 3:5, as shown. find the width and the length of

aleksandrvk [35]

Answer:

Width= 18inches Length= 30inches

Step-by-step explanation:

3+5= 8

48/8=6

3*6=18

5*6=30

7 0

3 years ago

One of ten different prizes was randomly put into each box of a cereal. If a family decided to buy this cereal until it obtained

Reptile [31]

Answer:

29.29

Step-by-step explanation:

The first trial among a distribution of independent trials with a constant success probability follows a geometric probability.

The expected value of a negative binomial is the reciprocal of its success probability p.

E(X)=1/p

At the first draw, we only selected one of the 10 prizes and so 1 draw gives a success

E(X)=1/p

E(X1)=1

After the first prize is drawn, we are interested in the first time (success), that we draw another prize that is different (p=9/10)

E(X2)=1/9÷10

E(X2)= 10/9

After the first prizes have being drawn, we now interested in the first time success that we draw a different prize from the first 2

E(X3)=1/8÷10

E(X3)=10/8

E(X3)=5/4

After the first three prizes have been drawn, we are now interested in the success of a first time draw for the 4th different prize

E(X4)=1/7÷10

E(X4)=10/7

Fifth different prize

E(X5)=1/6÷10

E(X5)=10/6

E(X5)=5/3

Sixth different prize

E(X6)=1/5÷10

E(X6)=10/5

E(X6)=2

Seventh different prize

E(X7)=1/4÷10

E(X7)=10/4

E(X7)=5/2

Eighth different prize

E(X8)=1/3÷10

E(X8)=10/3

Ninth different prize

E(X9)=1/2÷10

E(X9)=10/2

E(X9)=5

After the 9 different prizes have been drawn, we are interested in the first time we will draw the tenth different prize

E(X10)=1/1÷10

E(X10)=10

Add up all corresponding values;

E(X)=E(X1)+E(X2)+E(X3)+E(X4)+E(X5)+E(X6)+E(X7)+E(X8)+E(X9)+E(X10)

E(X)=1+10/9+5/4+10/7+5/3+2+5/2+10/3+5+10

E(X)= 29.29

Note: Those values in E(X), should be written the way it will in standard algebra ie they should be small.

4 0

3 years ago