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2 years ago

A Car’s rectangular gas tank has dimensions 30 cm by 25 cm by 42 cm.

Mathematics

1 answer:

Alchen [17]2 years ago

8 0

Answer:

$4851

Step-by-step explanation:

rectangular prism volume = length x width x height

1 litre = 1000 cm³

cost = $per litre x litres

v = l x w x h

30cm x 25cm x 42cm = 31500cm³

litres = cm³ / 1000

31500cm³ / 1000 = 31.5 litres

31.5 x $154 = $4851

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Riley is planning to plant a lawn in his yard. He will need 9 pounds of grass seed. He wants to mix Bermuda seed that costs $4.8

tankabanditka [31]

Given that total number of pounds of grass seed needed = 9

Let number of pounds of Bermuda seeds used = x

Let number of pounds of Fescue seeds used = y

Then sum of both gives equation:

x+y=9

or y=9-x...(i)

Given that cost of 1 pound of Bermuda seed = $4.80

Then cost of x pound of Bermuda seed = $4.80x

Given that cost of 1 pound of Fescue seed = $3.50

Then cost of y pound of Fescue seed = $3.50y

total cost will be 4.80x+3.50y

Given that cost of 1 pound of mix seed = $4.02

Then cost of 9 pound of mix seed = $4.02*9

combining all three parts, we get equation:

4.80x+3.50y=4.02*9

4.80x+3.50y=36.18...(ii)

plug (i) into (ii)

4.80x+3.50y=36.18

4.80x+3.50(9-x)=36.18

4.80x+31.5-3.50x=36.18

4.80x-3.50x=36.18-31.5

1.3x=4.68

x=3.6

Now plug x=3.6 into (i)

y=9-x=9-3.6=5.4

Hence final answer is given by:

Let number of pounds of Bermuda seeds he should buy = 3.6 pounds

Let number of pounds of Fescue seeds he should buy = 5.4 pounds

5 0

3 years ago

Solve each equation for the indicated variable 22. 12(m+3x)=18(x-3m);m

mr Goodwill [35]

Answer:

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

the map shows Henry's town . Each unit represents 1 kilometer. After school, Henry walks to the library. How far does he walk?

ivann1987 [24]

Answer:

Henry walks 7 kilometres from school to library

Step-by-step explanation:

Given:

1 unit = 1 Kilometre

To Find:

The distance between the library and the school

Solution:

The map below shows that Henry has walked from

-2 coordinate in the x axis to coordinate 5 along the same x axis

So he has walked a total of 7 units

Since we know that 1 unit = 1 Kilometre,

7 units will be

=> 7 x 1

=> 7 Kilometres

3 0

3 years ago

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70% of the 100 students in a middle school cafeteria bought their lunch. Some of the students that bought there lunch leave the

Fittoniya [83]

600 because 60 percent of 100 is 600

5 0

3 years ago

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Please help! Write the inequality. I will mark brainliest!

Alja [10]

Answer:

76,105

Step-by-step explanation:

3 0

3 years ago