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trasher [3.6K]
3 years ago
14

Please help me with this problem I'll mark brainliest!

Mathematics
1 answer:
Mekhanik [1.2K]3 years ago
7 0

Answer:

option C (3 - x)(x + 3)

Step-by-step explanation:

[(9 - x²) / 3x] / [(x² + 6x + 9) / 3x]

multiply by 3x/3x = 1

(9 - x²) / (x² + 6x + 9)

factoring

(3 - x)(3 + x) / (x + 3)(x + 3)

(x + 3) is common

(3 - x) / (x + 3)

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John is a runner. He runs the 100m sprint in 10x6s. What speed did he travel<br> at? (in m/s)
kykrilka [37]

Step-by-step explanation:

10x6s=60

100 divided by 60

=5/3 m/s  OR  1.6666666666666666666 m/s

7 0
3 years ago
State the chain rule for the derivative dy/dt if y(t)=f(u(t))(chain of f and u)
Ann [662]

Answer:

\displaystyle\frac{d(y(t))}{dt} =\displaystyle\frac{d(f(u(t)))}{dt} = f'(u(t)).u'(t)

Step-by-step explanation:

The chain rule helps us to differentiate functions and a composition of two functions.

Let r(u) and s(u) be two function. Then, composition of these two functions can be be differentiated with the help of chain rule. It states that:

\displaystyle\frac{d(r(s(u)))}{du} = r'(g(u)).s'(u)

Now, we are given

y(t) = f(u(t))

Then, by chain rule, we have:

\displaystyle\frac{d(y(t))}{dt} =\displaystyle\frac{d(f(u(t)))}{dt} = f'(u(t)).u'(t)

4 0
3 years ago
In the diagram, what is the value of x?
Katen [24]

Answer:

i believe its C

5 0
2 years ago
Read 2 more answers
How can I rename 82 thousands?
Setler [38]
82,000. hope that helped
6 0
3 years ago
Use the graph to complete the following. The probability that a boxer weighs between 60 and 80 pounds is %
AlexFokin [52]

Answer:

95%

Step-by-step explanation:

The Empirical rule, also the 68–95–99.7 rule, states that for a population that is approximately normal or symmetrical, nearly all of the data values will lie within three standard deviations of the mean;

68% of data values will fall within one standard deviation from the mean

95% of data values will fall within two standard deviation from the mean

99.7% of data values will fall within three standard deviation from the mean

From the graph given, we note that the weights 60 and 80 pounds fall within two standard deviations from the mean;

70 ± (2*5) = 70 ± 10 = (60, 80)

70 is the mean, 5 the standard deviation and 2 the number of standard deviations from the mean. From the Empirical rule we can conclude that the probability that a boxer weighs between 60 and 80 pounds is 95%

7 0
3 years ago
Read 2 more answers
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