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zvonat [6]
3 years ago
8

Simplify the product using FOIL. (2x – 7)(5x 5)

Mathematics
1 answer:
Reptile [31]3 years ago
3 0

FOIL is an 'acronym'.  It helps you remember how to multiply
two binomials ... like  (2x-7)  and  (5x+5) .

FOIL stands for "First, Outside, Inside, Last".  Here's how it's used
to multiply these particular two binomials:

                 (2x - 7) (5x + 5) 

First:        (2x) (5x) = 10x²

Outside:  (2x) (5) = 10x

Inside:     (-7) (5x) = -35x

Last:        (-7) (5) = -35

Add them all together, and you have the product:

                             10x² + 10x -35x -35

Simplify the sum:  10x² - 25x -35

     or                    5(x² - 5x - 7) .

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motikmotik

<em>Given, 9−7x=5−3x</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.⇒9−5=7x−3x</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.⇒9−5=7x−3x⇒4=4x</em>

<em>Given, 9−7x=5−3xPut x terms on one side and constants on another side.⇒9−5=7x−3x⇒4=4x⇒x= </em><em>4</em><em>/</em><em>4</em><em> </em><em> =1</em>

<em> =1Hence, required solution is x=1.</em>

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8 0
3 years ago
What is the domain of the function y = 3 l n x graphed below? On a coordinate plane, a curve starts in quadrant 4 and then incre
VladimirAG [237]

Answer:

<h2>X greater-than 0</h2>

Step-by-step explanation:

The given function is

y=3ln(x)

Which is a logarithm function. An important characteristic of logarithms is that their domain cannot be negatice, because the logarithm of a negative number is undefined, the same happens for x=0.

Therefore, the domain of this function is all real numbers more than zero.

The image attached shows the graph of this function, there you can notice its domain restriction.

So, the right answer is the first choice: x greater than 0.

5 0
4 years ago
What is the length of A(4, 2) B(9, 10)
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5 0
3 years ago
Exponentiation is the raising of one number to the power of another. This operation is performed using two asterisks **. Let's u
Harlamova29_29 [7]

In math, Exponentiation refers to the operation of raising one quantity to the power of another. See the program running the exponentiation below.

<h3>What is the required code?</h3>

The code is given below:

number_of_days = 30

amount_after_30days = 0.01 * (2 ** number_of_days)

# print the amount

print(amount_after_30days)

Learn more about exponentiation at;
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4 0
2 years ago
Can someone help me with this math problem, please? Thanks!
vichka [17]
Answer: D, -1
First, plug in the value -1 for x in f(x) first. \frac{1}{(-1)^2+1} can then be simplified to \frac{1}{2} because (-1)^2=1. Next, put the value -1 for x in the equation g(x). This will look like - \frac{1}{2}.

The final step is to evaluate f(x) divided by g(x). f(x) = 1/2 and g(x) = -1/2, so when divided, you get -1.
3 0
4 years ago
Read 2 more answers
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