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Liula [17]
3 years ago
7

Find the percent of change. Round to the nearest tenth. $56.00 to $80.00.

Mathematics
1 answer:
Nutka1998 [239]3 years ago
5 0

Answer:

42.9 % increase

Step-by-step explanation:

(80 - 56) / 56 = 0.42857...

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Find the inverse function of
shtirl [24]

Answer:

f(x) = 20x - 4 \\ substitute \: y \: for \: f(x) \\ y = 20x - 4 \\ interchange \: x \: and \: y \\ x = 20y - 4 \\ swap \: the \: sides \: of \: the \: equation \\ 20y - 4 = x \\ move \: the \: constant \: to \: the \: right \: hand \\ 20y = x + 4  \\ divide \: both \: sides \: by \: 20 \\ y =  \frac{1}{20} x +  \frac{1}{5}  \\ substitute \: f {}^{ - 1} (x) \: for \: y \\ f {}^{ - 1} (x) =  \frac{1}{20} x +  \frac{1}{5}

The domain of the inverse of a relation is the same as the range of the original relation. In other words, the y-values of the relation are the x-values of the inverse.

Thus, domain of f(x): x∈R = range of f¯¹(x)

and range of f(x): x∈R =domain of f¯¹(x)

3 0
2 years ago
A distribution of values is normal with a mean of 188 and a standard deviation of 20.8. Find the probability that a randomly sel
padilas [110]

Answer:0.8413

Step-by-step explanation:

Mean= 188, Std Dev. =20.8, Z=(x-mean)/Std Dev

P(X less than 167.2)= P(Z less than (167.2-188)/20.8)

=P(Z less than (-20.8/20.8))

=P(z less than -1)= P(Z less 1)

The value of 1 in the normal distribution table is 0.3413

So we add 0.5 to 0.3413 =0.8413

6 0
3 years ago
1 7/11 X 2 5/6 find the product
lana66690 [7]
1 7/11  = 18/11

2 5/6  = 17/6


Product = 18/11 * 17/6

 =  306 / 66  = 51/11  = 4 7/11  Answer
3 0
4 years ago
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3.33 repeating. if you look at it it's 2.70 what I would do is take away the zero for a minute and see how many times 9 goes into 27
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3 years ago
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If 25 pencils cost $12 find the unit rate per pencil
grin007 [14]

Answer:

$12/25 pencils= $0.48 per pencil

4 0
3 years ago
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