All categories

2 years ago

Barry buys a new washing machine.

Mathematics

1 answer:

Snezhnost [94]2 years ago

6 0

Answer:

The machine decreases in value by 20% each year.

After 1 year the machine is worth only .8 of its original value.

The machine will only decrease by .2 * (.8 A) in the second year not .2 * A where A is the original amount.

A1 = .8 A

A2 = .8 A1 = .64 A value of machine after 2 years

.8 is the value Barry needs when the machine is new

.8^n never goes to zero

After 10 years value = .8^10 A = .11 A of its original value

You might be interested in

During the half time of a basketball game, a sling shot launches T-shirts at the crowd. The T-shirt is launched with an initial

kumpel [21]

Step-by-step explanation:

The T-shirt is launched with an initial upward velocity of 60 ft/s from a height of 5 feet. Its equation of motion is given by :

$f(x) = -12x^2 + 60x + 5$ ....(1)

(a) For maximum height, put $\dfrac{df(x)}{dt}=0$

So,

$\dfrac{ d(-12x^2 + 60x + 5)}{dt}=-24x+60$

Now put,

$-24x+60=0\\\\x=2.5\ s$

So, the time taken for the T-shirt to reach maximum height is 2.5 seconds.

(b) Put x = 2.5 s in equation (1)

$f(x=2.5) = -12(2.5)^2 + 60(2.5) + 5\\\\f(x)=80\ \text{feet}$

8 0

2 years ago

2x - 5 = 11<br> Pease Answer Quickly

valentina_108 [34]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Karen and Anthony are setting up rows for the piano recital. They set up 24 rows with 6 chairs in each row. How many total peopl

AysviL [449]

You take 24x6.
6 People per row
24 rows
the answer is
144 people.

3 0

2 years ago

What is the range of the given function?<br><br> {(–2, 0), (–4, –3), (2, –9), (0, 5), (–5, 7)}

Novay_Z [31]

Range is the set of possible output values of a function. In this case, it’s (-9, -3, 0, 5, 7).

8 0

2 years ago

If 2x² – 2y = 125 and x - y = 2.5, find the value of<br> x + y

uysha [10]

We can solve this using substitution.

because x-y=2.5

x=y+2.5

Now substitute x into other equation.

2(y+2.5)^2-2y=125

2y^2+10y+12.5-2y=125

2y^2+8y-112.5=0

Now comes the ugly part

y=-4+-sqrt(16+900)

y=-4+-sqrt916

y=-4+-2sqrt229

x=-1.5+-2sqrt229

6 0

2 years ago