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3 years ago

PLEASE HELP ASAP

Mathematics

1 answer:

Ganezh [65]3 years ago

4 0

The answer is (C). We want to use reasoning to show that AD is perpendicular to BC, so we have to use something else in the “if” part of the “if-then” statementto say that the statement is true. You can’t use what you want to prove as your reasoning, which is what it is using for (D). So, the answer is (C).

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The rate at which a quantity of a radioactive substance decays is proportional to the quantity of the substance. The constant of

Butoxors [25]

Answer:

$\frac{dN}{dt} =$ λN N(0) = 6

N(t) = N₀e^(λt)

Applying the inital value condition

N(t) = 6e^(λt)

Step-by-step explanation:

Summarizing the information briefly and stating the variables in the problem.

t = time elapsed during the decay

N(t) = the amount of the radioactive substance remaining after time t

λ= The constant of proportionality is called the decay constant or decay rate

Given the initial conditions

N(0) = N₀ = 6

The rate at which a quantity of a radioactive substance decays ( $\frac{dN}{dt}$ ) is proportional to the quantity of the substance (N) and λ is the constant of proportionality is called the decay constant or decay rate :

$\frac{dN}{dt} =$ λN

N(t) = N₀e^(λt) ......equ 1

substituting the value of N₀ = 6 into equation 1

N(t) = 6e^(λt)

3 0

3 years ago

NEED HELP ASAP. WILL GIVE BRAINLY

balu736 [363]

Answer:

A. x = 2 and y =2

B. x = 3 and y = -1

Step-by-step explanation:

A. { x = 3y − 4

2x − y = 2

1) Substitute the value of x

2(3y − 4) − y = 2

2) Solve the equation for y

y = 2

3) Substitute the value of y

x= 3(2) -4

4) Solve the equation for x

x = 2

Final Solution: x = 2 and y =2

B. { 3x + 2y = 7

−x + y = −4

1) Multiply both sides of the equation by 3

-3x + 3y = -12

2) Eliminate one variable by adding the equations

3x + 2y = 7

+ (−3x + 3y = −12)

5y = -5

3) Divide both sides of the equation by 5

y = -1

4) Substitute the given value of y into the equation -x + y = -4

-x + (-1) = -4

5) Solve the equation for x

x = 3

Final Solution: x = 3 and y = -1

5 0

2 years ago

The American Veterinary Association claims that the annual cost of medical care for dogs averages $100 with a standard deviation

Taya2010 [7]

Answer:

The probability that the cost for someone's dog is higher than for the cat is 33.2%.

Step-by-step explanation:

With the data given, we know that the difference in cost of medical care of dogs and cats have a normal distribution with μ=-20 and σ=46.

To know the probability of the cost for the dog is higher than the cat, we have to calculate the probability of P(d>0).

Then we have to calculate z, and look up in a standarized normal distribution table.

Calculate z:

$z=\frac{X-\mu}{\sigma}=\frac{0-(-20)}{46}=\frac{20}{46}= 0.4348$

The probability of the difference being higher than 0, we have:

$P(d>0)=P(z>0.4348)=0.33185$

We can say that the probability that the cost for someone's dog is higher than for the cat is 33.2%.

8 0

2 years ago

What is the total weight, w, of 5 bags of soil?

Charra [1.4K]

Answer:200

Step-by-step explanation: I typed this and got it right

4 0

2 years ago

Y=6x-11 2x-3y=7 solve the system of eqations

3241004551 [841]

Answer:

(13/8, -5/4)

Step-by-step explanation:

substitute the value of y

{y=6x-11

2x-3y=7

solve the equation

2x-3(6x-11)=7

Substitute the value of x

x=13/8

Solve the equation

y=6x13/8-11

A possible solution is

y=-5/4

Check the solution

(x,y)=(13/8, -5/4)

Simplify

{-5/4=6x13/8-11

2x13/8-3x(-5/4)=7

The ordered pair is a solution

{-5/4=-5/4

7=7

Solution

(13/8, -5/4)

5 0

3 years ago