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lions [1.4K]
3 years ago
8

Multiply: (5t - 4)(4t + 5)

Mathematics
1 answer:
ANEK [815]3 years ago
5 0

Answer:

A. 20t² + 9t - 20

Step-by-step explanation:

(5t × 4t) + (5t × 5) - (4 × 4t) - (4 × 5)

= 20t² + (25t - 16t) - 20

= <u>20t² + 9t - 20</u> (A)

<em>Hope </em><em>this </em><em>is </em><em>h</em><em>e</em><em>l</em><em>p</em><em>ful </em><em>and </em><em>useful </em><em>:</em><em>)</em>

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When you want to write a polynomial, you should write the term with the highest degree first.
Here, it should go like this: d^3 + d^2 - d + 3
This means that the term which should be written first is the cubic term. 
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Henry's house weighs 65,000 pounds. He removes all of his belongings which weigh 5,000 pounds. Movers are using Crib Jacks to li
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Since 1 ton is 2,000 lbs, each Crib Jack can life 30,000 lbs. It's going to take 2 Crib Jacks, because the extra 5,000 lbs in belongings were removed, leaving the house at a weight of 60,000 lbs. 
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The area is 35

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45 + 60 = 15 x ___ + 15 x ___
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Answer:45+60=15x+15x

Step 1: Simplify both sides of the equation.

45+60=15x+15x

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Step 2: Flip the equation.

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3 years ago
Solve photo question. Mathematics. Please. Easy one. And last one.
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A collection of nickels and dimes is worth $4.40. There are 53 coins in all. How many nickels are there?

Nickel is a US coin worth 5 cents or 0.05.
Dime is a US coin worth 10 cents or 0.10

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n = 53 - d
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0.05d = 4.40 - 2.65
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n = 53 - d
n = 53 - 35
n = 18 

There are 18 nickels and 35 dimes.

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0.05(18) + 0.10(35) = 4.40
0.90 + 3.5 = 4.40
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