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soldier1979 [14.2K]
3 years ago
8

When X equals eight, Y equals 20 find Y when x equals 42

Mathematics
2 answers:
snow_tiger [21]3 years ago
6 0
If x equals 8 but then equals 42 then you multipled by 5.25, so multiply 20 by 5.25. Which is 105, then y equals 105.
gavmur [86]3 years ago
4 0
Y is equal to 105 because you divide 42 by 8 and get 5.25 (the amount it increased). then you multiply by its previous version 20 to get 105.
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If an electric kettle uses
cupoosta [38]

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The energy used in 3.5 hours = 5.25 kilowatts            

Step-by-step explanation:

Energy used by electric kettle:  

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Time taken by electric kettle:

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Electric kettle's rate in kilowatts per hour can be calculated by dividing the spent energy i.e. 2.25 kilowatts by the time taken i.e. 1.5 hours.

Therefore,

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Thus, the energy used in 3.5 hours = 1.5 × 3.5

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3 0
2 years ago
A truck can be rented from Company A form ​$130 a day plus $0.30 per mile. Company B charges ​$50 a day plus $0.80 per mile to r
navik [9.2K]

Answer:

160 miles

Step-by-step explanation:

Company A form ​$130 a day plus $0.30 per mile

Company A = 130 + 0.30x

Company B charges ​$50 a day plus $0.80 per mile

Company B = 50 + 0.80x

Where,

x = number of miles

Equate the cost of company A and company B

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Collect like terms

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Divide both sides by 0.50x

x = 80 / 0.50

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x = 160 miles

The number of miles in a day at which the rental costs for Company A and Company B are the same is 160 miles

4 0
2 years ago
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