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3 years ago

Solve -2 1/3- (-5) =

Mathematics

2 answers:

kirill [66]3 years ago

4 0

Answer:

8/3

Step-by-step explanation:

qwelly [4]3 years ago

3 0

The answer would be ~ $\frac{8}{3}$ ~ or ~ $2\frac{2}{3}$ ~

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a person bikes 2 1/2 miles at a constant rate in 1/8 of an hour what distance , does the person bikes in an hour.

yuradex [85]

Answer:

20 miles

Step-by-step explanation:

We are given that

Person traveled total distance by bike=2 1/2 miles

Person traveled total distance by bike== $2+\frac{1}{2}=2.5miles$

Time taken by person ,t=1/8 hour

We have to find the distance traveled by person bike in an hour.

We know that

Rate== $\frac{Distance}{time}$

Using the formula

Rate= $\frac{2.5}{\frac{1}{8}}$ miles/hr

Rate=20mph

In 1 hour person bike traveled distance=20 miles

4 0

3 years ago

CALCULUS:

slamgirl [31]

Answer:

$E(p)=\frac{p^2}{40-p^2}$

E(3) = 0.29

2. See Below

Step-by-step explanation:

According to the formula we would need the derivative, so lets first calculate the derivative of f(p) given.

The rules to use would be $f(x)=ax^n\\f'(x)=nax^{n-1}$

Also, remember to use chain rule if there is a function inside a function. So we differentiate the "inside" function again.

Now, lets differentiate:

$f(p)=\sqrt{40-p^2}\\f(p)=(40-p^2)^{\frac{1}{2}}\\f'(p)=\frac{1}{2}(40-p^2)^{\frac{1}{2}-1}*(-2p)\\f'(p)=\frac{1}{2}(40-p^2)^{-\frac{1}{2}}*(-2p)\\f'(p)=-\frac{p}{\sqrt{40-p^2}}$

Now, the E(p):

$E(p)=-\frac{pf'(p)}{f(p)}\\E(p)=-\frac{p*(-\frac{p}{\sqrt{40-p^2}})}{\sqrt{40-p^2}}\\E(p)=\frac{p^2}{40-p^2}$

We find E(3) by substituting 3 into "p":

$E(p)=\frac{p^2}{40-p^2}\\E(3)=\frac{3^2}{40-3^2}\\E(3)=\frac{9}{31}\\E(3)=0.29$

When E(p) = 1, it means the price elasticity of demand is "1". It is the called Unitary Elastic Demand. It means that for every unit change in price, there is the same unit change in demand. The changes of demand and price are proportional to each other.

7 0

3 years ago

Mr. Martin worked nine hours last week Mr. Stevens worked five times as many hours as Mr. Martin write an equation to find out h

melomori [17]

equation- 9 × 5 = 45
mr. stevens worked for 45 hours last week

5 0

3 years ago

PLEASE HELP!!<br> Convert each linear equation to standard form.<br> y-4= -2(x+3)

hjlf

So first, this is point slope form. The first step is to distribute.)
$y-4=-2x-6$
Then add 4 to both sides.
$y=-2x-2$
Then add 2x and it becomes
$2x+y=-2$

4 0

4 years ago

Read 2 more answers

The value of a mountain bike Y(in dollars) can be approximated by the model Y=200(1-.0025) to the t power, where T is the number

tino4ka555 [31]

Answer:

It will take 554 years

Step-by-step explanation:

Here, we want to estimate the time when t will be $50

We can rewrite the exponential equation as;

y = 200(1-0.0025)^t

In this case, y = $50 and we want to calculate t

so, we simply proceed to substitute the value 50 for y

we have this as ;

50 = 200(1-0.0025)^t

50/200 = (1-0.0025)^t

1/4 = 0.9975^t

0.25 = 0.9975^t

Take the natural logarithm of both sides

ln 0.25 = ln 0.9975^t

ln 0.25 = t ln 0.9975

t = ln 0.25 / ln 0.9975

t = 553.8 = 554 years

The bike will be $50 in 554 years

5 0

3 years ago

Solve -2 1/3- (-5) =​

Solve -2 1/3- (-5) =