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3 years ago

Express as a trinomial (x-9)(x+4)

Mathematics

2 answers:

Paladinen [302]3 years ago

6 0

Answer:

x×(x+4)-9 (x+4)

x2+4x-9x-36

x2-5x-36

Step-by-step explanation:

hope this answer will you support

svetoff [14.1K]3 years ago

4 0

Answer:

x² - 5x - 36

Step-by-step explanation:

Use FOIL (First, Outside, Inside, Last) to solve. x times x is x², so that is the first term of our trinomial. The outside terms are x times 4, or 4x. The inside terms are -9 and x, so -9x. The last terms are -9 times 4, or -36. We can add the like terms of 4x and -9x to get -5x. So, your trinomial is x² - 5x - 36.

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800-675, why do we borrow?

Stolb23 [73]

When doing vertical subtraction, 800 - 675 will turn out like this:
800
- 675


You should know that we start on the right and then end on the left.

So, we do 0 - 5, 0 - 7, then 8 - 6, right?
No. We have to borrow because you can't have a negative number when doing each number individually, only until the end. In this case, there won't be any negative numbers.

You can't do 0 - 5 or 0 - 7, so you have to borrow, changing the number to the left of it one lower (unless it's 0, so then you must borrow the the next number after that).

5 0

4 years ago

Read 2 more answers

<img src="https://tex.z-dn.net/?f=%20-%203%289x%20%2B%2020%29%20%5Cgeqslant%2015x%20-%2020" id="TexFormula1" title=" - 3(9x + 20

Len [333]

Answer:

$x\le \:-\frac{20}{21}$

Step-by-step explanation:

$-3\left(9x+20\right)\ge \:15x-20\\\\\mathrm{Expand\:}-3\left(9x+20\right):\quad -27x-60\\-27x-60\ge \:15x-20\\\\\mathrm{Add\:}60\mathrm{\:to\:both\:sides}\\-27x-60+60\ge \:15x-20+60\\\\\mathrm{Simplify}\\-27x\ge \:15x+40\\\\\mathrm{Subtract\:}15x\mathrm{\:from\:both\:sides}\\-27x-15x\ge \:15x+40-15x\\\\\mathrm{Simplify}\\-42x\ge \:40\\\\\mathrm{Multiply\:both\:sides\:by\:-1\:\left(reverse\:the\:inequality\right)}\\\left(-42x\right)\left(-1\right)\le \:40\left(-1\right)$

$Simplify\\42x\le \:-40\\\\\mathrm{Divide\:both\:sides\:by\:}42\\\frac{42x}{42}\le \frac{-40}{42}\\\\Simplify\\x\le \:-\frac{20}{21}$

6 0

3 years ago

Can someone explain how to do

Alinara [238K]

The solution is:

$3\leq y\leq 10$

y ≥ 3 and y≤10

Further explanation:

The given inequality is compound inequality which is solved in two parts.

Given inequality is:

$10 \leq 2y+4\leq 24$

The two inequalities which will be formed are:

$2y+4\geq 10\\2y+4\leq 24$

Solving one by one

$2y+4\geq 10\\2y+4-4\geq 10-4\\2y\geq 6\\\frac{2y}{2} \geq \frac{6}{2} \\ y \geq 3\\2y+4\leq 24\\2y+4-4\leq 24-4\\2y\leq 20\\\frac{2y}{2}\leq \frac{20}{2} \\y\leq 10$

The solution is:

$3\leq y\leq 10$

y ≥ 3 and y≤10

Keywords: Inequalities, Compound inequalities

Learn more about inequalities at:

#LearnwithBrainly

8 0

4 years ago

What are the critical values X2/L and X2/R that correspond to a 99% confidence level and a sample size of 30?

Zarrin [17]

Answer:

Step-by-step explanation:

3 0

3 years ago

You can ignore eleven

satela [25.4K]

12.
Elaine=X
Tyler=X+8
---------
$x + (x + 8) = 34 \\ x + x + 8 = 34 \\ 2x + 8 = 34 \\ 2x = 34 - 8 \\ 2x = 26 \\ x = 13 \\ x + 8 = 21$
Elain=13
Tyler=21

3 0

3 years ago