2 years ago

I needddddd heellllpppp plzzzzz

Mathematics

2 answers:

KIM [24]2 years ago

5 0

14 x 4.75 is 66.5 and 14 x 1.25 is 17.5

djverab [1.8K]2 years ago

5 0

Answer:

Robert could buy 4 cupcakes and 20 cookies.

Step-by-step explanation:

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You previously found the mean of this data set. Use that in answering the question. 63, 89, 92, 73, 79, 72, 34, 36, 94, 21, 25,

kicyunya [14]

Answer:

Sum of squares of differences = 11239.74

Step-by-step explanation:

We are given the following data set:

63, 89, 92, 73, 79, 72, 34, 36, 94, 21, 25, 93, 22, 90, 79

We have to calculate the sum of square of the data set.

Formula:

$\text{Sum of square of differences} = \sum (x_i -\bar{x})^2$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{962}{15} = 64.13$

Sum of squares of differences =

1.284444444 + 618.3511113 + 776.5511113 + 78.61777778 + 221.0177779 + 61.88444445 + 908.0177776 + 791.4844443 + 892.017778 + 1860.484444 + 1531.417778 + 833.2844446 + 1775.217777 + 669.0844446 + 221.0177779

= 11239.74

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2 years ago

Luke sells toy cars for $12 each.His expenses are $3.50 per car,plus $34 for tools.How many cars must he sell for his revenue to

faust18 [17]

Answer: 4

Step-by-step explanation:

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2 years ago

Franklin uses the distributive property to write an expression equivalent to 18 + 36. Which of the following best represents Fra

allsm [11]

18+36=54
i tried to do all of these and none of them add up to 54

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3 years ago

Read 2 more answers

Solve for a: a(a-3) =100

marissa [1.9K]

$a(a-3) =100\\
a^2-3a-100=0\\
\Delta=(-3)^2-4\cdot1\cdot(-100)=9+400=409\\
\sqrt{\Delta}=\sqr{409}\\
a_1=\dfrac{-(-3)-\sqrt{409}}{2\cdot1}=\dfrac{3-\sqrt{409}}{2}\\
a_2=\dfrac{-(-3)+\sqrt{409}}{2\cdot1}=\dfrac{3+\sqrt{409}}{2}$

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3 years ago

NEED HELP PLEASE WILL MARK BRAINLIEST !!!

Leona [35]

The answer you need is b

3 0

3 years ago