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yuradex [85]
3 years ago
13

A truck driver drove 49 miles in 1 1/3 hours. What is the average speed, in miles per hour, or this trip?

Mathematics
1 answer:
larisa86 [58]3 years ago
5 0
I believe that the answer to this question would be that his average speed, in miles per hour, would be 36 3/4 mph.
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Determine if the two functions f and g are inverses of each other
Margarita [4]

Answer:

Yes.

Step-by-step explanation:

f(g(x))

f(\frac{x-12}{9})  

( I will have to replace all x's in 9x+12 with (\frac{x-12}{9})

9(\frac{x-12}{9})+12

(x-12)+12

x-12+12

x+(-12+12)

x+0

x

So the answer is yes.

5 0
3 years ago
the sum of two numbers is 75. The second number is three less than twice the first. what is the larger number?
KatRina [158]

Answer:

49

Step-by-step explanation:

If the smaller number is

x

, then the larger number is

2

x

−

3

Explanation:

(

x

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(

2

x

−

3

)

=

75

3

x

−

3

=

75

3

x

=

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The numbers are 26 and 49.

5 0
3 years ago
Solve by factoring:<br> 1) x² + 6x + 8 = 0
Serhud [2]

Answer:

x=-4  x=-2

Step-by-step explanation:

x² + 6x + 8 = 0

x² +2x+4x + 8 = 0

x(x+2)+4(x+2)=0

(x+4)(x+2)

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3 0
3 years ago
Read 2 more answers
A Cepheid variable star is a star whose brightness alternately increases and decreases. For a certain star, the interval between
sattari [20]

Answer:

a)

B'(t) = \dfrac{0.9\pi}{4.4}\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)

b) 0.09

Step-by-step explanation:

We are given the following in the question:

B(t) = 4.2 +0.45\sin\bigg(\dfrac{2\pi t}{4.4}\bigg)

where B(t) gives the brightness of the star at time t, where t is measured in days.

a) rate of change of the brightness after t days.

B(t) = 4.2 +0.45\sin\bigg(\dfrac{2\pi t}{4.4}\bigg)\\\\B'(t) = 0.45\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)\times \dfrac{2\pi}{4.4}\\\\B'(t) = \dfrac{0.9\pi}{4.4}\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)

b) rate of increase after one day.

We put t = 1

B'(t) = \dfrac{0.9\pi}{4.4}\cos\bigg(\dfrac{2\pi t}{4.4}\bigg)\\\\B'(1) = \dfrac{0.9\pi}{4.4}\bigg(\cos(\dfrac{2\pi (1)}{4.4}\bigg)\\\\B'(t) = 0.09145\\B'(t) \approx 0.09

The rate of increase after 1 day is 0.09

8 0
3 years ago
I WILL GIVE BRAINLIEST TO THE FIRST CORRECT ANSWER. PLEASE HELP QUICK!<br><br>PICTURE IS ADDED BELOW
svetoff [14.1K]

Answer: the answer is x the mitochondria

Step-by-step explanation:

8 0
3 years ago
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