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3 years ago

Patrica can drive 36 kilometers for every 3 liters of gas she puts in the car.

Mathematics

1 answer:

Elza [17]3 years ago

3 0

108 .

explanation : 36 x 3 = 108

( it’s easy multiplication )

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3^x= 3*2^x<br> solve this equation

densk [106]

Answer:

${3}^{x} = 3 \times {2}^{x} \\ x = \frac{ln(3)}{ln(3) -ln(2) } = \frac{1.09}{1.09 - 0.69} \\ x = 2.7$

I hope I helped you^_^

5 0

3 years ago

sarah can complete a project in 90 minutes and her sister betty can complete it in 120 minutes if they both work on the project

alukav5142 [94]

Answer:

It will take them approximately 51.43 minutes to complete the project together

Step-by-step explanation:

This is what is called a "shared job" problem.

The best way to work on them is to start by finding the "portion" of the job done by each of the people in the unit of time.

So, for example, Sarah completes the project in 90 minutes, so in the unit of time (that is 1 minute) she completed 1/90 of the total project

Betty completes the project in 120 minutes, so in the unit of time (1 minute) she completes 1/120 of the total project.

We don't know how long it would take for them to complete the project when working together, so we call that time "x" (our unknown).

Now, when they work together completing the entire job in x minutes, in the unit of time they would have done 1/x of the total project.

In the unite of time, the fraction of the job done together (1/x) should equal the fraction of the job done by Sarah (1/90) plus the fraction of the job done by Betty. This in mathematical form becomes:

$\frac{1}{x} =\frac{1}{90} +\frac{1}{120}\\\frac{1}{x} =\frac{4}{360} +\frac{3}{360}\\\frac{1}{x} =\frac{7}{360} \\x=\frac{360}{7} \\x=51.43\,\,min$

So it will take them approximately 51.43 minutes to complete the project together.

8 0

4 years ago

Hassan is cooking some rice the recipe says he needs 450 grams of rice for 6 people.how many kilograms of rice would he need for

gregori [183]

Answer:

so if we take 450 an divide it by 6 you get 75. So take 75 times 18 and you get 1,350 so he would need 1,350 kilograms of rice for 18 people

Step-by-step explanation:

hope this helps :D

4 0

2 years ago

Can someone answer this question?

viktelen [127]

7>x>1
7 is greater than x, and x is greater than one

OR

1one is less than x, x is less than 7

8 0

3 years ago

A box of light fixtures cost $43 if you had $600 and I bought is moving boxes as you could how much money would you have left

Mademuasel [1]

Answer:

13 Boxes with $41 left over

Step-by-step explanation:

$600/$43 = 13.9 (so she can buy 13 boxes of light fixtures)

$43 x 13 = $559

$600-$559=$41 left over

6 0

3 years ago