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Margarita [4]
3 years ago
12

Find the product of (2x + 5y)(2x − 5y).

Mathematics
2 answers:
Nana76 [90]3 years ago
7 0
The final answer for this is 4x^2-25y^2.
Whitepunk [10]3 years ago
4 0

Answer:

Option D  is correct.

the product of (2x+5y)(2x-5y) is, 4x^2-25y^2

Step-by-step explanation:

Using identity rule:

(a+b)(a-b) = a^2-b^2

To find the product of:

(2x+5y)(2x-5y)

Apply the identity rule:

here, a = 2x and b = 5y then

(2x+5y)(2x-5y) =(2x)^2-(5y)^2

=4x^2-25y^2

Therefore, the product of (2x+5y)(2x-5y) is, 4x^2-25y^2

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If 40% of a given number is 8, then what is 15% of the given number?
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40% of a given number is 8...
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0.15(20) = 3 <==== ur answer
5 0
3 years ago
A gardener is planting two types of trees:
lara [203]

It will take exactly 4 years for these trees to be the same height

Step-by-step explanation:

A gardener is planting two types of trees:

  • Type A is 3 feet tall and grows at a rate of 7 inches per year
  • Type B is 5 feet tall and grows at a rate of 1 inches per year

We need to find in how many years it will take for these trees to be the

same height

Assume that it will take x years for these trees to be the same height

The height of a tree = initial height + rate of grow × number of years

Type A:

∵ The initial height = 3 feet

∵ 1 foot = 12 inches

∴ The initial height = 3 × 12 = 36 inches

∵ The rate of grows = 7 inches per year

∵ The number of year = x

∴ h_{A} = 36 + (7) x

∴ h_{A} = 36 + 7 x

Type B:

∵ The initial height = 5 feet

∴ The initial height = 5 × 12 = 60 inches

∵ The rate of grows = 1 inches per year

∵ The number of year = x

∴ h_{B} = 60 + (1) x

∴ h_{B} = 60 + x

Equate h_{A} and h_{B}

∴ 36 + 7 x = 60 + x

- Subtract x from both sides

∴ 36 + 6 x = 60

- Subtract 36 from both sides

∴ 6 x = 24

- Divide both sides by 6

∴ x = 4

∴ The two trees will be in the same height in 4 years

It will take exactly 4 years for these trees to be the same height

Learn more:

You can learn more about the rate in brainly.com/question/10712420

#LearnwithBrainly

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