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2 years ago

Help me with this math homework please

Mathematics

1 answer:

Mkey [24]2 years ago

6 0

Answer:

Step-by-step explanation:

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1. Use precise mathematical language to justify and explain each mathematical process.

iris [78.8K]

Mathematical processes are the steps used to determine the result of operations

The perimeter of the rectangle is $10x^2 - 14x + 28$
The area of the rectangle is $5x^3 +17x^2 -31x + 45$

The dimension of the rectangle is given as:

$Length = 5x^2 - 8x + 9$

$Width = x + 5$

(1) The perimeter of the triangle

This is the sum of the side lengths of the rectangle.

So, we have:

$Perimeter = 2 \times (Length + Width)$

This gives

$Perimeter = 2 \times (5x^2 - 8x + 9 + x + 5)$

Collect like terms

$Perimeter = 2 \times (5x^2 - 7x + 14)$

Open brackets

$Perimeter = 10x^2 - 14x + 28$

Hence, the perimeter of the rectangle is $10x^2 - 14x + 28$

(2) The area of the triangle

This is the product of the dimensions of the rectangle.

So, we have:

$Area = Length \times Width$

This gives

$Area = (5x^2 - 8x + 9) \times (x + 5)$

Open brackets

$Area = 5x^3 - 8x^2 + 9x +25x^2 - 40x + 45$

Collect like terms

$Area = 5x^3 - 8x^2 +25x^2+ 9x - 40x + 45$

$Area = 5x^3 +17x^2 -31x + 45$

Hence, the area of the rectangle is $5x^3 +17x^2 -31x + 45$

Read more about areas and perimeters at:

brainly.com/question/15656646

6 0

2 years ago

How do I solve this?? I can’t remember

Alika [10]

Answer:

Item or service cost times sales tax so $45x0.6= meal and then you add 20% of 27

6 0

2 years ago

Find the value of a if x=2 y= -1 z=-3 solve: a= y²-x z/5

krek1111 [17]

2 1/2 or 2.2 I think.

4 0

2 years ago

What is the inequality shown here

IgorLugansk [536]

Answer:

$- 3 \leqslant x < 2$

I hope I helped you^_^

5 0

2 years ago

What is the product of −3/11 and −2/15?

Dafna11 [192]

Multiply -3/11 and -2/15 straight across

-3(-2) = 6
11(15) = 165

6/165 is your product, or 0.036 (rounded)

hope this helps

5 0

3 years ago

Read 2 more answers