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3 years ago

Let 2x-5y=16 and 5x+3y=9. what is the value of 12x+y

1 answer:

3 0

2x-5y=16 =>10x-25y=80
5x+3y=9 => 10x+6y=18
subtract one from the other: (6-(-25)y=(18-80), 31y=-62, y=-2
plug y=-2 in 2x-5y=16 to find x: 2x+10=16, x=3
12x+y=12*3-2=34

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What type of number results when a positive number is divided by a negative number and vice versa.

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3 years ago

Find the value of x so that the function has the given value. t(x) = 3x; t(x) 24*

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3 years ago

There are two similar packages. The ratio of the volumes is 8:125. Determine the dimensions of the bigger package. The dimension

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Step-by-step explanation:

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3 years ago

The average number of newspapers for sale in an airport stand is 15. SD is 6. The average age of the pilots is 36 and SD is 4. W

balu736 [363]

Answer:

The average age of pilots has a lower coefficient of variation, so it is the most consistent data set.

Step-by-step explanation:

The coefficient of variation is used to measure consistency of a data set. It is the standard deviation divided by the mean. The higher the coefficient of variation, the more variable, that is, the least consistent the data set is.

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$C = \frac{6}{15} = 0.4$

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The consistency is:

$C = \frac{4}{36} = 0.11$

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4 years ago

Match the properties with the steps to solving the following equation. (8.x – 6) = x + 9

lesantik [10]

Answer:

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x = 15/7 : Division property of equality

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Step-by-step explanation:

Match the properties with the steps to solving the following equation.

(8x - 6) = x + 9

8x - 6 = x + 9 : Given

8x - x - 6 = x + 9 - x

7x - 6 = 9 :Subtraction property of equality

7x - 6 + 6 = 9 + 6

7x = 15 : Addition property of equality

7x/ 7 = 15/7

x = 15/7 : Division property of equality

x = 2.143

4 0

3 years ago