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Mice21 [21]
3 years ago
11

Suppose a varies directly as b, and a =8 when b =3 find b when a =24

Mathematics
1 answer:
Natasha2012 [34]3 years ago
4 0

Answer:

b=9

Step-by-step explanation:

since a varies directly as b,

a=kb

k=a/b

k=8/3

but when a=24, b will be given by

b=a÷k

b=24÷8/3, b=24×3/8

b=9

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Urgent answer please <br> Ax+ay+xa+ya
marin [14]

Answer:

Possible derivation:

d/dx(a x + a y(x) + x a + y(x) a)

Rewrite the expression: a x + a y(x) + x a + y(x) a = 2 a x + 2 a y(x):

= d/dx(2 a x + 2 a y(x))

Differentiate the sum term by term and factor out constants:

= 2 a (d/dx(x)) + 2 a (d/dx(y(x)))

The derivative of x is 1:

= 2 a (d/dx(y(x))) + 1 2 a

Using the chain rule, d/dx(y(x)) = (dy(u))/(du) (du)/(dx), where u = x and d/(du)(y(u)) = y'(u):

= 2 a + d/dx(x) y'(x) 2 a

The derivative of x is 1:

= 2 a + 1 2 a y'(x)

Simplify the expression:

= 2 a + 2 a y'(x)

Simplify the expression:

Answer:  = 2 a

Step-by-step explanation:

8 0
3 years ago
What is the surface area of the right trapezoidal prism 36cm 90cm?
mr Goodwill [35]
This should help
https://math.tutorvista.com/geometry/surface-area-of-a-trapezoidal-prism.html?view=simple
4 0
3 years ago
What is the solution to the inequality -3x - 42 &gt; 3
rosijanka [135]

Answer:

I don’t know which answer choice it is since C and D are the same but the answer is supposed to be x < -15.

Step-by-step explanation:

the image has the work shown

5 0
2 years ago
In the year 2006, a company made $2.4 million in profit. For each consecutive year after that, their profit increased by 12%. Ho
Dmitriy789 [7]

Answer:

Step-by-step explanation:

For each consecutive year after that, their profit increased by 12%. The growth is exponential. We would apply the formula for exponential growth which is expressed as

A = P(1 + r)^t

Where

A represents the profit made after t years.

t represents the number of years.

P represents the initial profit made.

r represents rate of increase.

From the information given,

P = 2.4 × 10^6

r = 12% = 12/100 = 0.12

t = 4 years

Therefore,

A = 2.4 × 10^6(1 + 0.12)^4

A = 2.4 × 10^6(1.12)^4

A = 3776446.5

4 0
4 years ago
Does anyone know how to solve the equation ln 2 - ln(x - 8) = 4, giving nearly 80 points
RoseWind [281]

Answer:

x= 8.1353

x= 8.135 (rounded to the nearest tenth-thousandths)

x= 8.14 (rounded to the nearest thousandths)

x= 8.1 (rounded to the nearest tenth)

Step-by-step explanation:

<u><em>Note I am not 100% sure with my answer</em></u>

2 − ln (x − 8)= 4

−ln (x − 8) + 2= 4

−ln (x − 8) + 2 + −2= 4 + −2

−ln (x − 8)= 2

−ln (x − 8)/−1= 2/−1

ln (x − 8)= −2

<solve for the logarithm (ln)>

ln (x − 8)= −2

e^ln (x − 8)= e^−2

x − 8= e^−2

x − 8= 0.1353

x − 8 + 8= 0.1353 + 8

x= 8.1353

5 0
3 years ago
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