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Dmitry [639]
3 years ago
15

Dan bought a new computer for $900. Each year, the value of the computer decreased by 25% of the previous year’s value.

Mathematics
1 answer:
Anna35 [415]3 years ago
8 0

Answer:

$29, that is the answer for this question

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Farmer Brown has 42 animals, which are cows and chickens. They have a total of 120 legs. Write a system of equations, show your
SCORPION-xisa [38]

Answer:

The system of equations is:

x + y = 42

4x + 2y = 120

And there are 24 chickens.

Step-by-step explanation:

We know that the total number of cows (x) plus the total number of chickens (y) is 42, because Farmer Brown has 42 animals.

We also know that cows (x) have 4 legs and so 4 times the number of cows is the number of cow legs. And chickens (y) have 2 legs, so the number of chickens times two represents the total chicken legs. The sum of 4x + 2y is 120 because there are 120 legs in total.

To solve the system of equations, first solve each equation for y.

In the first equation:

x + y = 42

Subtract x from both sides to isolate y.

y = 42 - x

Second equation:

4x + 2y = 120

Subtract 4x from both sides

2y = 120 - 4x

Divide both sides by 2

y = 60 - 2x

Now that the y's are isolated in both equation, you can put them into 1 equation. Where y = y:

y = 42 - x

y = 60 - 2x

42 - x = 60 - 2x

Add 2x to both sides

42 + x = 60

Subtract 42 from both sides

x = 18

Since x is the number of cows, we know that Farmer Brown has 18 cows.

Now we can substitute the x value into one of the equations:

y = 42 - x

y = 42 - (18)

y = 24

The number of chickens is represented by y, so there are 24 chickens.

3 0
2 years ago
What is three fourths divided by eight thirdteenths?
xz_007 [3.2K]
\frac{3}{4} , \frac{8}{13} is \frac{39}{32}

\frac{3}{4}  *  \frac{13}{8} = ? , multiple by the reciprocal of the second fraction to get the answer.
3 0
3 years ago
Solve for x:<br> 1000 = 500e^2x
myrzilka [38]

Answer: x=2/e^2

Step-by-step explanation:

6 0
3 years ago
Take a moment to think about what tan(θ) represents.1. Use interval notation to represent the values of θ (between 0 and 2π) whe
Nonamiya [84]

Let's first get the representation of tan

We also need to understand how to convert radians to degrees

\begin{gathered} \frac{\pi}{2}=90^0 \\ \pi=180^0 \\ \frac{3\pi}{2}=270^0 \\ 2\pi=360^0 \end{gathered}

For question 1

since tan > 1

It must be in either first quadrant or third quadrant as shown in the diagram above

\begin{gathered} \text{ } \\ \frac{\pi}{4}

5 0
1 year ago
Which is an equivalent expression for four sevenths squared times two thirds raised to the power of negative three all raised to
Ket [755]

Seven-fourths squared times two-thirds cubed the expression is (7/4)² x (2/3)³. The correct option is B.

<h3>What is an expression?</h3>

Expression in maths is defined as the collection of the numbers variables and functions by using signs like addition, subtraction, multiplication, and division.


Numbers (constants), variables, operations, functions, brackets, punctuation, and grouping can all be represented by mathematical symbols, which can also be used to indicate the logical syntax's order of operations and other features.

The given expression will be solved as below:-

[ ( 4 / 7)² x ( 2 / 3)⁻³ ]⁻¹ =  ( 4 / 7)⁻² x  (2 / 3)³

[ ( 4 / 7)² x ( 2 / 3)⁻³ ]⁻¹ = ( 7 / 4)² x  (2 / 3)³

Therefore, seven-fourths squared times two-thirds cubed the expression is (7/4)² x (2/3)³. The correct option is B.

To know more about expression follow

brainly.com/question/12592609

#SPJ1

6 0
1 year ago
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