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3 years ago

Find the formula for df^-1/dx. f(x)=(7-x)^3

1 answer:

7 0

Here is the equation to solve the problem above:

f(x) = (7-x)^3
y = (7-x)^3

switch y and x
x = (7 - y)^3

third root of x = 7 - y
-y = 3rootx - 7

so:f′(x)=3^√x−7

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A line passes through the points (5, –7.5) and has a y-intercept of 10.

brilliants [131]

Answer:y=0.5x+10

Step-by-step explanation:

need help with explanation?

4 0

3 years ago

If the principal is $300 rate 3% time 4 years then what is the interest earned and the new balance

Tomtit [17]

Answer:

a) Interest earned = $36

New Balance = $336

b) Interest rate = 0.05 or 5%

New Balance = $517.5

c) time t = 5

New Balance = $612.5

d) Principal Amount = $675

New Balance = $783

Step-by-step explanation:

We are given:

a) Principal (P) = $300

Rate (r) = 3% or 0.03

Time (t)= 4 years

Interest earned = ?

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding interest

$Simple \ Interest (I)= P\times r\times t\\Simple \ Interest (I)= 300\times 0.03\times 4\\Simple \ Interest (I)= 36$

So, Interest earned = $36

New Balance = Principal + Interest = 300+36 = $336

b) a) Principal (P) = $300

Rate (r) = ?

Time (t)= 3 years

Interest earned = 67.50

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding rate

$Simple \ Interest (I)= P\times r\times t\\67.50= 450\times r\times 3\\67.50=1350\times r\\r=\frac{67.50}{1350}\\r=0.05 \ or \ 5\%$

So, Interest rate = 0.05 or 5%

New Balance = Principal + Interest = 450+67.50 = $517.5

c) Principal (P) = $500

Rate (r) = 4.5% or 0.045

Time (t)= ?

Interest earned = $112.50

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding time

$Simple \ Interest (I)= P\times r\times t\\112.50= 500\times 0.045\times t\\112.50=22.5 \times t\\t=\frac{112.50}{22.5}\\t=5$

So, time t = 5

New Balance = Principal + Interest = 500+112.50 = $612.5

d) Principal (P) = ?

Rate (r) = 8% or 0.08

Time (t)= 2 years

Interest earned = 108.00

The formula used is: $Simple \ Interest (I)= P\times r\times t$

Putting values and finding Principal

$Simple \ Interest (I)= P\times r\times t\\108=P\times 0.08 \times 2\\108=P\times 0.16\\P=\frac{108}{0.16}\\P=675$

So, Principal Amount = $675

New Balance = Principal + Interest = 675+108 = $783

8 0

3 years ago

True or false. to solve y in the equation 2x y=5, subtract 2 from both sides of the equation

gladu [14]

True. To solve for y you have to subtract 2 from both sides of the equation.

3 0

3 years ago

HELP ASAP Write the equation of the line passing through the points (-5,8) and (-8,5).

ycow [4]

Answer:

y=-5/8x+0

Step-by-step explanation:

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2 years ago

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frutty [35]

Answer:

-1/2

Step-by-step explanation:

counting down by 2 over one

6 0

2 years ago