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Nostrana [21]
3 years ago
13

Nine more than four times a number is the same as one less than twice the number find the number

Mathematics
1 answer:
lianna [129]3 years ago
5 0
The answer is -5. -5 times 4 is -20, plus 9 is -11. -5 times 2 is -10, -1 is -11. -5 works.
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A(x) = -0.015x^3+1.05xA ( x ) = − 0.015 x 3 + 1.05 x gives the alcohol level in an average person's blood x hrs after drinking 8
goldfiish [28.3K]

Answer:

Yes

Step-by-step explanation:

the function that gives the alcohol level is:

A ( x ) = - 0.015 x^3 + 1.05 x

where x is the number of hours.

we need to know if after 4 hours an average person is legally drunk, thus:

x=4

and we substitute this in the function:

A ( 4 ) = - 0.015 (4)^ 3 + 1.05(4)

solving these operations we obtain:

A(4)=-0.015(64)+4.2\\A(4)=-0.96+4.2

A(4)=3.24

the alcohol level after 4 hours is 3.24.

Since a person is considered to be legally drunk if the level exceeds 1.5, and we obtained 3.24 which is greater than 1.5, a person who has been drinking for 4 hours under the conditions indicated by the problem would be considered legally drunk.

5 0
3 years ago
(7p+8)-(5p-2) combine like terms
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The answer is:<span>
</span><span>
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8 0
3 years ago
Suppose that the data in a scatterplot are randomly located so that there is no relationship between x and y. Which of the follo
Sever21 [200]
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7 0
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Hope this helps :)
6 0
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Is f(x)= -2(3)^-x an increasing or decreasing function?
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8 0
3 years ago
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