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3 years ago

What is value of this expression below when y=3 8y^2-y-8

Mathematics

2 answers:

serg [7]3 years ago

8 0

Plug in 3 for y
8(3)^2-(3)-8
8(9)-3-8
72-3-8 = 61

VMariaS [17]3 years ago

8 0

Answer:

Step-by-step explanation:

8x3^2 -3-8

8x9-3-8

72-3-8

72-11

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Viktor [21]

5z^2 + 16

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3 years ago

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Answer:

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Step-by-step explanation:

Following dates are given

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3 years ago

A car starts with a dull tank of gas. After driving around 5he city, 1/7 of the gas has been used. With the rest of the gas in t

Sati [7]

Answer:

$\frac{2}{7}$

Step-by-step explanation:

Given:

A car starts with a dull tank of gas

1/7 of the gas has been used around the city.

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Question asked:

What fractions of a tank of gas does each complete trip to Ottawa use?

Solution:

Fuel used around the city = $\frac{1}{7}$

Remaining fuel after driving around the city = 1 - $\frac{1}{7}$

= $\frac{7 - 1}{7} = \frac{6}{7}$

According to question:

As from the rest of the gas in the car that is $\frac{6}{7}$ , the car can complete 3 trip to Ottawa which means,

By unitary method:

The car can complete 3 trip by using = $\frac{6}{7}$ tank of gas.

The car can complete 1 trip by using = $\frac{6}{7} \div 3$

= $\frac{6}{7} \times\frac{1}{3}$

= $\frac{6}{21}$

= $\frac{2}{7}$ tank of gas

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3 years ago

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seropon [69]

Answer:

Because I took the test and got it correct.

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2 years ago

Read 2 more answers