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Sladkaya [172]
3 years ago
15

..........................

Mathematics
1 answer:
Ipatiy [6.2K]3 years ago
6 0

\dfrac{3}{x^2+14x+48}\div\dfrac{3}{10x+60}=\dfrac{3}{x^2+8x+6x+48}\cdot\dfrac{10x+60}{3}\\\\=\dfrac{1}{x(x+8)+6(x+8)}\cdot\dfrac{10(x+6)}{1}=\dfrac{10(x+6)}{(x+6)(x+8)}=\dfrac{10}{x+8}

Answer: C. \dfrac{10}{x+8}

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Find the 12th term of the given explicit geometric formula.<br> f(n) =3(2)^ n-1
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Answer:

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Step-by-step explanation:

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3 years ago
.Write a division equation so that it has a solution of -2
Irina18 [472]
Let’s take a random number such as 10, for example as the divisor of the equation.
Let’s take the dividend, or numerator of the fraction be x.
The solution of the fraction would be -2.

x/10 = -2
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4 0
3 years ago
Step 3a: Calculating the average rate
Alex73 [517]

9514 1404 393

Answer:

  a) average rate = (total distance)/(total time)

  b) Rave = 2·R1·R2/(R1 +R2)

  c) cheetah's average rate ≈ 50.91 mph

Step-by-step explanation:

a) Let AB represent the distance from A to B. Let t1 and t2 represent the travel times (in hours) on leg1 and leg2 of the trip, respectively. Then the distances traveled are...

  First leg distance: AB = 70·t1   ⇒   t1 = AB/70

  Second leg distance: AB = 40·t2   ⇒   t2 = AB/40

The average rate is the ratio of total distance to total time:

  average rate = (AB +AB)/(t1 +t2)

  average rate = 2AB/(AB/70 +AB/40) = 2/(1/70 +1/40) = 2(40)(70)/(70+40)

  average rate = 560/11 = 50 10/11 . . . mph

__

No equations are given, so we cannot compare what we wrote with the given equations. In each step of the solution, we have used the rules of algebra and equality.

b) For two rates over the same distance (as above), the average is their harmonic mean:

  average rate = 2r1·r2/(r1+r2)

__

c) The cheetah's average rate was 50 10/11 mph ≈ 50.91 mph.

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3 years ago
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Could you take. A picture of the problem
8 0
3 years ago
Read 2 more answers
Help...(MATH).......
Hitman42 [59]

If f(x) = √x and g(x) = 7x + b, then

f(g(x)) = f(7x + b) = √(7x + b)

If the plot of f(g(x)) passes through (4, 6), then

f(g(4)) = √(7•4 + b) = √(28 + b) = 6

Solve for b :

√(28 + b) = 6

(√(28 + b))² = 6²

28 + b = 36

b = 36 - 28

b = 8

7 0
2 years ago
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