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3 years ago

Please help, I’m trying to learn but I’m having so much trouble not understanding.

Mathematics

1 answer:

Alona [7]3 years ago

3 0

Answer:

-6x^2 +5xy - 6x

Step-by-step explanation:

Remember PEMDAS.

First distribute -5x into (x-y+1), as well as x into (x+1)

distributing first part: -5x^2 + 5xy - 5x ( remember, subtracting a negative is like adding.)

distributing second part: -x^2 - x (These are both negative due to the - in front of the X in the original problem.).

Then just simplify it by adding <em>like terms</em> (terms with the same variables and powers.). -5x^2 + 5xy - 5x - x^2 - x

-6x^2 +5xy - 6x

Answer: -6x^2 +5xy - 6x

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12 years ago, Catherine deposited $200 in a savings account that pays 7.25% simple interest. What is the balance in Catherine’s

allochka39001 [22]

Answer:

132

Step-by-step explanation:

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3 years ago

15. The dollar amount y that remains to be repaid on a loan x months after the loan is issued is represented by y=-1000x + 8000.

irina [24]

Answer:

1) $8000

2) $1000

3) 8 months, since y represents our remaining amount to be paid, we set it equal to 0, to see when $0 need to be paid. Solving for x (months), we can it to be 8.

Step-by-step explanation:

We have the equation y = -1000x + 8000 which follows the linear equation:

y = mx + b, where m is our slope and b is our y-intercept

1) The initial balance can be found with our constant "b" which in this case is 8000. You can also plot the function of y and you will find that 8000 is the intercept when x = 0, aka the start

2) We can calculate the rate of change for when the loan is repaid by looking at the slope "m", in this case it is 1000. It subtracts 1000 each month, meaning $1000 is being payed and taken out of the bank account

3) To find how many months it will take for the loan to be repaid, let's solve for x when y = 0.

0 = -1000x + 8000

-8000 = -1000x

8 = x

It will take 8 months. Why? Since y represents our remaining amount to be paid, we set it = 0, to see when $0 need to be paid. Solving for x (months), we can it to be 8.

5 0

3 years ago

<img src="https://tex.z-dn.net/?f=3%5Csqrt%7B2%7D%20%2B%204%5Csqrt%5B3%5D%7B2%7D" id="TexFormula1" title="3\sqrt{2} + 4\sqrt[3]{

ss7ja [257]

Answer:

⇒

2 √ 3 ( 1 + √ 2 ) − √ 2 + 3 √ 5

Explanation:

( 2 √ 3 + 3 √ 20 − ( 4 √ 2 − 3√ 5 2 6 )

⇒ 2 √ 3 + 3 √ 2− 4 √ 2 + 3 √ 5 + 2 √ 6 ,

Removing bracess

⇒ 2 √ 3 − √ 2 + 3 √ 5 + 2 √ 2 ⋅ √ 3

⇒ ( 2 √ 3 + √ 2 ⋅ 2 √ 3 ) − √ 2 + 3 √ 5 ⇒ 2 √ 3 ( 1 + √ 2 ) − √ 2 + 3 √ 5

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3 years ago

Brenda has a square-shaped photo frame. If the area of the square frame is 123 square inches, which statement is true? The lengt

alex41 [277]

It would be between 11 and 12 because 11 times 11 = 121 and that is smaller than 123. Also 12 times 12 is 144 and 12 a whole number.

3 0

3 years ago

Read 2 more answers

Let f(x) =2x and g(x)= x - 2 the graph of (f.g )(x) is shown below

Vika [28.1K]

Answer:

The domain of the graph is all real number ⇒ the last answer

Step-by-step explanation:

* Remember that our original exponential formula was y = ab^x

- The b value is the growth factor

* Lets revise how to find the domain of this function

- The domain is all values of x that make the function defined

* Lets revise the composite function

- A composite function is a function that depends on another function.

- A composite function is created when one function is substituted

into another function.

- For example, f(g(x)) is the composite function that is formed when

g(x) is substituted for x in f(x).

∵ f(x) = 2^x

∵ g(x) = x - 2

∴ (f · g)(x) = f(x - 2)

∵ f(x) = 2^x

∴ (f · g)(x) = f(x - 2) = 2^(x - 2)

- For this function there is no values of x make the function undefined

∴ The Domain is all real numbers

- Look to the graph, the values of x go from -∞ to ∞

* The domain of the graph is all real number

6 0

3 years ago