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3 years ago

I have been having trouble with this one for a while please help

Mathematics

1 answer:

Gelneren [198K]3 years ago

8 0

The answer is A.

A is correct because...

(7z+23)-(15z+9) There's an invisible positive 1 in front of (7z+23). Distribute.

7z+23-(15z+9) Distribute the negative sign among 15z and 9.

7z+23-15z-9 Now, combine the like terms, 7z, and -15z. 7z - 15z

-8z+23-9 Combine the like terms, 23 and -9. 23 - 9

-8z +14

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Barak spent $20 at the arcade. this represents 10%of the money earned by working at thepizza parlor last week.

Karolina [17]

20=10%
times 10
200=100%

he earned $200 at the parlor

4 0

3 years ago

Evgesh-ka [11]

The answer will end up being c

6 0

3 years ago

In 2012 your car was worth $10,000. In 2014 your car was worth $8,850. Suppose the value of your car decreased at a constant rat

monitta

Answer:

The function to determine the value of your car (in dollars) in terms of the number of years t since 2012 is:

$f(t) = 10000(0.9407)^t$

Step-by-step explanation:

Value of the car:

Constant rate of change, so the value of the car in t years after 2012 is given by:

$f(t) = f(0)(1-r)^t$

In which f(0) is the initial value and r is the decay rate, as a decimal.

In 2012 your car was worth $10,000.

This means that $f(0) = 10000$ , thus:

$f(t) = 10000(1-r)^t$

2014 your car was worth $8,850.

2014 - 2012 = 2, so:

$f(2) = 8850$

We use this to find 1 - r.

$f(t) = 10000(1-r)^t$

$8850 = 10000(1-r)^2$

$(1-r)^2 = \frac{8850}{10000}$

$(1-r)^2 = 0.885$

$\sqrt{(1-r)^2} = \sqrt{0.885}$

$1 - r = 0.9407$

Thus

$f(t) = 10000(1-r)^t$

$f(t) = 10000(0.9407)^t$

7 0

3 years ago

Pop said, "I have three grandchildren on my knee: Vera, Chuck and Dave. "Chuck is three years younger than Dave.

Ostrovityanka [42]

Okie dokie buddy pokie

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3 years ago

Simplify the expression. What classification describes the resulting polynomial?

valentinak56 [21]

Answer:

A quadratic Trinomial

Step-by-step explanation:

hope this helps

Given

(3x² - 11x - 4) - (2x² - x - 6)

Distribute both parenthesis, noting the second is distributed by - 1

= 3x² - 11x - 4 - 2x² + x + 6 ← collect like terms

= x² - 10x + 2 ← this is a quadratic with 3 terms, thus trinomial → A

8 0

3 years ago

Read 2 more answers