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2 years ago

11

Kate sold one half of her paintings and purchased 7 more. If Kate has 21 paintings now, how many paintings did she have to begin

with?

1 answer:

Anna11 [10]2 years ago

6 0

(work backwards)
21-7=14 (before purchasing)
14x2=28 (before selling)

Ans: 28

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Compare the two numbers using an inequality symbol square root of 25 and square root of 64

Gnoma [55]

The square root of 64 is greater than the square root of 25; (square root sign) 64 > (square root sign) 25

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3 years ago

For this set of data,<br> 89, 88, 84, 87, 89, 84, 84, 83, 85, 89, 84<br> Find the standard deviation

Ilia_Sergeevich [38]

Answer: 2.2962419891482

Step-by-step explanation: First get the mean of the numbers or the average

the mean in this case is 86

then subtract each number by the mean of 86

the numbers then become : 3, 2, -2, 1, 3, -2, -2, -3, -1, 3, -2

then square all the numbers to get : 9, 4, 4, 1, 9, 4, -4, 9, 1, 9, 4

then find the mean of those numbers which is 5.2727272727273

then find the square root of this number to find the standard deviation

2.2962419891482 is the standard deviation

hope this helps mark me brainliest if it helped

6 0

3 years ago

What does product rule of exponents say

LuckyWell [14K]

The rules of exponents are
$( x^{m})( x^{n})=( x^{m+n})$
$\frac{ x^{m} }{ x^{n} } = x^{m-n}$
$x^{ \frac{m}{n} } = \sqrt[n]{ x^{m} }$
$( x^{m} )( y^{m} )=(yx)^{m}$
$( x^{m})^{n}=x^{mn}$
$( \frac{x}{y})^{m}= \frac{x^{m}}{y^{m}}$
$x^{-n}= \frac{1}{x^{n}}$
these are just some basic ones

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2 years ago

Read 2 more answers

Subtract the quotient of 18 and 3 from the sum of 22 and 9

netineya [11]

25 cuz 18/3=6 and 22+9=31. 31-6=25

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3 years ago

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The value of a dirt bike decreases by 15% each year. If you purchased this dirt bike today for $500, to the nearest dollar how m

guapka [62]

$500 x 0.85 = 425
$425 x 0.85 = 361.25
$361.25 x 0.85 = 307.10
$307.1 x 0.85 = 261
$261 x 0.85 = 221.85

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3 years ago