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2 years ago

(4x+5)-(4x-5) simplify the expression

Mathematics

2 answers:

LiRa [457]2 years ago

4 0

Answer:

Step-by-step explanation:

To simplify the expression, open the brackets to obtain your result.

(4x + 5) - (4x - 5)
→ 4x + 5 - (4x - 5)
→ 4x + 5 + (-4x + 5)
→ 4x + 5 - 4x + 5
→ 5 + 5
→ 10

Hence, the result is 10.

scoray [572]2 years ago

3 0

The answer to the question is 10

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a storage room measures 20 feet by 15 feet. the floor is covered by tiles that cost $7.50 per square foot. what will be the cost

Sidana [21]

Answer: $2250

Step-by-step explanation:

Given information

Dimension of the room = 20 feet × 15 feet

Cost of tiles = $7.50 / ft²

Derived formula from the given information

Total cost = Floor area × Cost of tiles

Substitute values into the formula

Total cost = Floor area × Cost of tiles

Total cost = (20 × 15) × (7.5)

Simplify by multiplication

Total cost = 300 × (7.5)

$\Large\boxed{Total~cost~=~2250~Dollars}$

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2 years ago

The table below shows two equations:

Setler [38]

The answer is a

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3 years ago

The blueprint of a fishing pier uses a scale of 1/8 inch = 5 feet. If the pier is 3 19/4 inches long on the blueprint, find its

poizon [28]

Answer:

190

Step-by-step explanation:

1/8= 5 ft

19/4 = 38/8

38/8 = 38*5 = 190 feet

4 0

3 years ago

Let f(x)=9x^3-12x^2-31 and let g(x)=3x-1. Find f(x)/g(x)

kumpel [21]

Answer: f(x)/g(x) = 3x^2 + 6x - 2 - 12/3x+1

Step-by-step explanation:

The first function is f(x) = 9x^3+21x^2-14

The second function is g(x) = 3x+1

f(x)/g(x = 9x^3+21x^2-14/3x+1

We perform the long division as shown in the attachment to obtain the quotient as: Q(x) = 3x^2+6x - 2 and remainder R = -12

Therefore f(x)/g(x) = 3x^2 + 6x - 2 - 12/3x-1

Where x does not = -1/3

6 0

2 years ago

Read 2 more answers

A person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20

lorasvet [3.4K]

Answer:

21.27 meters.

Step-by-step explanation:

Please find the attachment.

Let H and h represent height of building and tree respectively.

We have been given that a person on the ground looks up at an angle of 28° and sees the top of a tree and the top of a building aligned. The tree is 20 m away from the person and the building is 60 m away from the person.

We know that tangent relates opposite side of a right triangle with its adjacent side.

$\text{tan}=\frac{\text{Opposite}}{\text{Adjacent}}$

$\text{tan}(28^{\circ})=\frac{H}{60}$

$60\cdot \text{tan}(28^{\circ})=H$

$60\cdot 0.531709431661=H$

$H=31.90256589966\approx 31.90$

Similarly, we can find height of the tree.

$\text{tan}(28^{\circ})=\frac{h}{20}$

$20\cdot\text{tan}(28^{\circ})=h$

$20\cdot 0.531709431661=h$

$h=10.63418863322\approx 10.63$

$H-h=31.90-10.63$

$H-h=21.27$

Therefore, the difference in heights between the building and tree is 21.27 meters.

3 0

2 years ago