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2 years ago

WILL MARK BRAINLIEST PLEASE ANSWER

Mathematics

2 answers:

Artemon [7]2 years ago

6 0

Answer:

Step-by-step explanation:

hey

Citrus2011 [14]2 years ago

6 0

Omg no way I don’t get it if u get the answer lmk

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The axis of the sphere below is 16 units in length. What is the surface area of the sphere?.

Nataly_w [17]

There are enough information's already given in the question. Based on those information's that answer can be easily deduced.
Radius of the sphere = 8 units
Then
Surface area of the sphere = 4 *pi * r^2
= 4 * pi * (8)^2
= 4 * pi * 64
= 256pi
I hope that this answer has come to your help.

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2 years ago

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Levi bought 14 chicken wings for $22.40 how much would it cost for 12 wings

777dan777 [17]

Answer:

x =19.20

Step-by-step explanation:

We can use ratios to solve

14 wings 12 wings

------------- = ---------------

22.40 x

Using cross products

14x = 22.40 * 12

14x =268.8

Divide each side by 14

14x/14 = 268.8/14

x =19.20

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2 years ago

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Terri’s checkbook shows a balance of $129.38. She must pay her phone bill of $39.61 and an insurance bill of $62.75. While she i

lord [1]

She will have enough money to buy the coffee maker. after you take away the 2 bills, you are left with $27.02. if she buys the coffee machine, she will have $5.03 left.

or 129-40-63=26 - 22 = 4

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2 years ago

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Juan can download new songs for $1.29 each. Write an equation to show how many songs he can download for $10.00.

Triss [41]

Answer: The correct option is

(A) $1.29x=10.$

Step-by-step explanation: Given that Juan can download new songs for $1.29 each.

We are to write an equation to show how many songs he can download for $10.00.

Let x represents the number of songs that Juan can download for $10.00.

Then, according to the given information, the equation can be written as follows :

$1.29\times x=10\\\\\Rightarrow 1.29x=10.$

Thus, the required equation is $1.29x=10.$

Option (A) is CORRECT.

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2 years ago

Determine the number of proper subsets contained in S if S = {x|x is an even, negative integer and x > -27}

zzz [600]

First, lets determine $|S|$ (the number of elements in $S$ ).

We can see that the negative even integers that are between -27 and 0 are: -24, -22, -20, -18, -16, -14, -12, -10, -8, -6, -4, and -2.
This means $|S|=13$ .

A proper subset of $S$ is can't be $S$ itself, this means the a proper subset of $S$ can't have 13 elements.

Given that re-arranging the elements of any set doesn't yield a different set, we use combinations (binomial coefficients) to get the number of subsets in a particular set.

The number of subsets of $S$ with 1 element are given by $(^{13}_{1})$ (which means 13 combine 1), in the same way the number of subsets with 2 elements is given by $(^{13}_{2})$ and so forth until reaching the number of subsets with 12 elements.

The previous statement can be written as:
$\Sigma^{12}_{k=0}(^{13}_{k})$

In the previous summation we also included the empty subset, which is always a proper subset of $S$ .

So $\Sigma^{12}_{k=0}(^{13}_{k})$ is an acceptable answer, but we can simplify it.
The following statement is true (it can be easily proven):
$\Sigma^{n}_{k=0}(^{n}_{k})=2^n$

From our previous discussion, this means that the number of subsets of any arbitrary set $S$ is equal to $2^{|S|}$ .
This means that the number of proper subsets (which is the number of subset minus the set itself, for finite subsets) is equal to $2^{|S|}-1$ .

So, the answer is:
$\Sigma^{12}_{k=0}(^{13}_{k})=2^{13}-1=8192-1=8191$

There are 8191 proper subsets of $S$ .

8 0

2 years ago