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2 years ago

Translate the following into an algebraic expression:

Mathematics

1 answer:

kaheart [24]2 years ago

6 0

Answer:

2(n-9)

Step-by-step explanation:

Hi there!

Let "a number" = n.

"The difference" translates to subtraction, so when the question tells us "the difference of a number and 9", it translates to "n-9".

"Twice" means we'll be doubling something. In this case, we're doubling "n-9":

2(n-9)

I hope this helps!

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Afina-wow [57]

2 and 3 for A
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3 years ago

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Ramond is putting a fence around his rectangular garden shown above. Before he can build the fence, he needs to find the perimet

solniwko [45]

The gardens perimeter is 12 meters.

Explanation:

The garden has a 4m length and a 2m width. The perimeter of any given rectangle is two times the sum of the length and the width of the same rectangle.

Perimeter = 2 × (length of the rectange + width of the rectangle)

Perimeter = 2 × (4m + 2m) = 2 × (6m) = 12 meters.

So the gardens perimeter is equal to 12 meters.
Ramond needs to buy a fence for a garden whose parameter is 12 meters.

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3 years ago

For what value of x is the rational expression below equal to zero x-4/(x+5)(x-1)

Tanzania [10]

We have that

<span>(x-4)/(x+5)(x-1)
</span> the rational expression is equal to zero <span>whenever its numerator is zero
</span>x-4=0---------> x=4

the answer is x=4

4 0

3 years ago

The longer leg of a 30°- 60°- 90° triangle is 4 3 cm. Which is the length of the hypotenuse?

liberstina [14]

i think its 25 because of the Pythagorean theorem. 4^2 + 3^2= 16 + 9 =25

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6 0

3 years ago

The gas tank on the back of a tanker truck can be equated to a cylinder with a diameter of 8 feet and a length of 19 feet. A gal

Leokris [45]

9514 1404 393

Answer:

driver's tank: 30,427 lb
farmer's tank: 12,811 lb

Step-by-step explanation:

The formula for the volume of a cylinder is ...

V = πr^2·h . . . radius r, height h

The radius of the driver's tank is half its diameter, so is (8 ft)/2 = 4 ft. Then the volume of that tank is ...

V = π(4 ft)^2·(19 ft) = 304π ft^3

Each cubic foot of gasoline has a mass of ...

(1728 in^3/ft^3)(0.0262 lb/in^3) = 45.2736 lb/ft^3

Then the total mass in the driver's full tank is ...

(304π ft^3)(45.2736 lb/ft^3) ≈ 43,238.3 lb

The farmer's tank is a scaled-down version of the driver's tank. It's volume will be scaled by the cube of the linear scale factor, so will be (2/3)^3 = 8/27 of the volume of the driver's tank.

The farmer's tank will hold a mass of (43,238.3 lb)(8/27) ≈ 12,811 lb.

The amount remaining in the driver's tank is 43,238 -12,811 = 30,427 lb.

6 0

3 years ago