nanda22
10.07.2019 •
Mathematics
Ineed with these three questions ( me turn them into algebraic form) ! 1.the quotient of five and the difference of a number and three 2.the product of a number and twenty decreased by eleven 3.the difference of thirty and a number, multiplied by two
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Ответ:
the quotient of 5 and the difference of a number and 3..
5 / (x - 3) <== ur expression
the product means multiplydecreased means subtract
the product of a number and 20 decreased by 11..
20x - 11 <== ur expression
the difference means subtract
the difference of 30 and a number, multiplied by 2
2(30 - x) <== ur expression
Ответ:
76 weeks
Step-by-step explanation:
Let's write an equation for both tank. Let A be tank 1 and let B be tank 2.
So, Tank A already holds 684 galloons but is leaking at 4 galloons per week. In other words, after x weeks, the total amount of galloons Tank A holds is:
Tank B holds 912 galloons but is leaking at 7 galloons per week. So, after x weeks, the amount of galloons Tank B holds is:
To find out after how many weeks will the galloons in the two tanks be equivalent, set the two equations equal to each other and solve for x:
Add 7x to both sides. The right cancels:
Subtract 684 from both sides:
Divide both sides by 3:
So, the amount of water in the two tanks will be identical after 76 weeks.
Let's check, after 76 weeks, the amount of water left in Tank A is:
And in Tank B:
So, we're correct!
And we're done!