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3 years ago

5

I need help to see if this is right

1 answer:

Marrrta [24]3 years ago

7 0

The first thing I would like to help you with is recommend you buy a folder. It will help you keep your work organized and prevent catastrophes like this.

<u>1</u><u />
12.5 km/h
<u>2
</u><u /><u />90 km/h
<u>3
</u>It would take about 4.5 seconds.
<u>4
</u>40 minutes
<u>5
</u>A. 0.2km/m
B. 0.5km/m
C. 0.3km/m faster

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What’s the least common multiple of x^2-2x-15 and x^2+2x-3?

Ghella [55]

Answer:

$\large\boxed{LCM(x^2-2x-15,\ x^2+2x-3)=(x+3)(x-5)(x-1)}\\\boxed{=x^3-3x^2-13x+15}$

Step-by-step explanation:

$x^2-2x-15=x^2+3x-5x-15=x(x+3)-5(x+3)=(x+3)(x-5)\\\\\\x^2+2x-3=x^2+3x-1x-3=x(x+3)-1(x+3)=(x+3)(x-1)\\\\LCM(x^2-2x-15,\ x^2+2x-3)=(x+3)(x-5)(x-1)\\\\=(x^2-2x-15)(x-1)\qquad\text{use FOIL}\\\\=(x^2)(x)+(x^2)(-1)+(-2x)(x)+(-2x)(-1)+(-15)(x)+(-15)(-1)\\\\=x^3-x^2-2x^2+2x-15x+15\qquad\text{combine like terms}\\\\=x^3+(-x^2-2x^2)+(2x-15x)+15\\\\=x^3-3x^2-13x+15$

4 0

3 years ago

Describe the solutions for this inequality.

Olegator [25]

D) i think

, all values of x that are greater than equal to 1
7
8

3 0

2 years ago

What is the answer when you evaluate n + m -2(m-m) when m = 3 and n = 2?

Effectus [21]

Answer:

5

Step-by-step explanation:

n + m -2(m-m)

Combine like terms

n+m+2(0)

n+m

Let m=3 and n=2

2+3

5

7 0

2 years ago

The volume of a rectangular prism is given by the formula V=lwh, where I is the length of the prism, w is the width, and h is th

antoniya [11.8K]

Answer:

The answer is $6x^{3} +39x^{2}+54x$

Step-by-step explanation:

Volume of the rectangular prism = Length * Width * Height

Length (l) = $x+2$

Width (w) = $3x$

Height (h) = $2x+9$

By substituting these values to the equation above,

Volume of the rectangular prism = $(x+2)*3x*(2x+9)$

= $(3x^{2} +6x)*(2x+9)$

= $6x^{3} +27x^{2} +12x^{2} +54x$

= $6x^{3} +39x^{2}+54x$

Therefore,

The answer is $6x^{3} +39x^{2}+54x$

3 0

2 years ago

Read 2 more answers

What is the solution set to the following system?

elena-s [515]

The correct answer is C
3+ 0 is 3
3^2 + 0 is 9

3 0

2 years ago