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Karo-lina-s [1.5K]
3 years ago
8

The sum of Alex's height and Ben's height is 130 inches. Subtracting Alex's height from Ben's height yields one-third of Ben's h

eight. How tall is Ben, in terms of inches?
Mathematics
2 answers:
In-s [12.5K]3 years ago
5 0

Ben is 97.5 inches tall.

Alex is 32.5 inches tall.

Assoli18 [71]3 years ago
5 0

Let Alex's height = a.

Let Ben'x height = b.


a + b = 130

b - a = b/3


Subtract b/3 from both sides int he second equation to obtain:

(2/3)b - a = 0


Add this new equation to the first original equation.


(5/3)b = 130


b = 130 * 3/5


b = 78


a + b = 130


a + 78 = 130


a = 130 - 78


a = 52


Answer: Alex's height is 52 inches, and Ben's height is 78 inches.

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For this case we can make the following rule of three:

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From here, we clear the value of x.

We have then:

x = (\frac{35}{14}) * (4)\\x = 10

therefore, 10 gallons are needed to irrigate 35 plants.

Answer:

it will take 10 gallons to water 35 plants

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write an expression for the new balance using as few terms as possible. A checking account has a balance of -$126.89. A customer
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Answer:

New balance = -151.89 + 4.5x

(where x is the value of the smaller deposit)

Step-by-step explanation:

The inicial balance was -126.89.

Then, it were made two deposits, one with the value of x, and one that is 3 1/2 times the other, that is, 3.5x.

Then, the customer made a withdraw of $25.

So, The new balance can be calculated as:

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8 0
3 years ago
Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.
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F(g(x)) = [(-7x-8)/(x-1) - 8} / [(-7x - 8)/(x-1) + 7] =

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g(f(x)) = [-7*(x-8)/(x+7) - 8] / [(x-8)/(x+7) - 1] =

[(-7x + 56 -8*(x+7)) / (x+7)] / [(x - 8 - (x + 7)) / (x+7)] = (-15x) / (-15) = x.

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Answer:

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We will find the volume of the paint tray and compare it with the volume of the gallon.

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Difference = 231-220.50=10.5 cubic inches.

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