3 years ago

Betsy has 10 more dimes than quarters if she has 3.45 how many coins does she have

Mathematics

1 answer:

geniusboy [140]3 years ago

7 0

I think its 17 dimes.

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An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in Texas. Suppose that the

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Taylor wants to find the perimeter of a rectangular playground. The lenght of the playground measures (3x-20) metres. The width

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Find the missing probability.<br> P(A) = 0.4; P(B) = 0.7; P(A or B)<br> ; P(A and B) = 0.3

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Given:

$P(A)=0.4, P(B)=0.7, P(A\text{ and }B)=0.3$

To find:

The value of $P(A\text{ or }B)$ .

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We know that,

$P(A\text{ and }B)=P(A\cap B)$

$P(A\text{ or }B)=P(A\cup B)$

It means, we have $P(A)=0.4, P(B)=0.7, P(A\cap B)=0.3$ and we need to find the value of $P(A\cup B)$ .

$P(A\cup B)=P(A)+P(B)-P(A\cap B)$

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$P(A\cup B)=1.1-0.3$

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Let ŷ represent the profit (in thousands of dollars) for a certain company x years after 1970. A statistician calculates a linea

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Answer:

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Step-by-step explanation:

The model for profit (y), in thousands of dollars, as a function of time (x), in years after 1970 is:

$y=0.66x +12$

The corresponding value of x in 1978 is:

$x= 1978-1970\\x=8$

Estimating the profit (in thousands of dollars) in 1978:

$y(8)=0.66*8 +12\\y(8) = 17.28$

Converting it to dollars:

$P = \$1,000*y(8)= \$1,000*17.28\\P= \$17,280$

The estimated profit in 1978 is $17,280.

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