All categories

2 years ago

MATH math can you help me pls

Mathematics

2 answers:

Alexxandr [17]2 years ago

7 0

Answer: A = k =250

B= y,x=0.5

Step-by-step explanation: Find the constant of variation.

hichkok12 [17]2 years ago

7 0

Answer:

A=250

B=x,y=0.5

Step-by-step explanation:

You might be interested in

Kroger has total assets of $675 million. Its total liabilities are $200 million and its equity is $375 million. Show me how to c

anygoal [31]

$200/$375 = 25.9%

your answer is 25.9%

5 0

2 years ago

PLZ HELP ILL MARK U BRAINLIEST!!!

lidiya [134]

Answer:

x=18

Step-by-step explanation:

7x-1=125

+1 +1

7x=126

7 7

X=18

3 0

2 years ago

Chistopher is 20 years younger than ishaan. Ishaan and chistopher first met two years ago. Fourteen years ago, ishaan was 3 time

lisabon 2012 [21]

Answer:

Ishaan is 49 years old.

Step-by-step explanation:

Let the present age of Christopher be 'C'.

Let the present age of Ishaan be 'I'.

From the given data, we can form equations which will help us solve the problem.

Christopher is 20 years younger than Ishaan. This means:

C = I - 20 . . . (1)

Fourteen years ago, Ishaan would have been (I -14) years old and Christopher (C - 14) years old.

From the data, I - 14 = 3(C - 14) . . . (2)

Substituting the value of C in Equation 2, we get:

I - 14 = 3(I - 20 - 14)

⇒ I - 14 = 3(I - 34)

⇒ I - 14 = 3I - 112

⇒ 2I = 112 + 14 = 98

⇒ I = 49

So, Ishaan is 49 years old.

4 0

3 years ago

The amount A of the radioactive element radium in a sample decays at a rate proportional to the amount of radium present. Given

slavikrds [6]

Answer:

a) $\frac{dm}{dt} = -k\cdot m$ , b) $m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$ , c) $m(t) = 10\cdot e^{-\frac{t}{2438.155} }$ , d) $m(300) \approx 8.842\,g$

Step-by-step explanation:

a) Let assume an initial mass m decaying at a constant rate k throughout time, the differential equation is:

$\frac{dm}{dt} = -k\cdot m$

b) The general solution is found after separating variables and integrating each sides:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$

Where $\tau$ is the time constant and $k = \frac{1}{\tau}$

c) The time constant is:

$\tau = \frac{1690\,yr}{\ln 2}$

$\tau = 2438.155\,yr$

The particular solution of the differential equation is:

$m(t) = 10\cdot e^{-\frac{t}{2438.155} }$

d) The amount of radium after 300 years is:

$m(300) \approx 8.842\,g$

4 0

3 years ago

Read 2 more answers

the daily supply of oxygen for one person is provided by 625 square feet of lawn. a total of 5625 square feet of lawn would prov

Anestetic [448]

The answer is 9. 5625 / 625 = 9

This means that 5625 square feet of lawn would provide the daily supplies of oxygen for 9 people

4 0

3 years ago