All categories

4 years ago

15(d + 7) = 4(d - 4) + 11d has how many solutions?

Mathematics

1 answer:

svp [43]4 years ago

4 0

$15(d + 7) = 4(d - 4) + 11d\\\\15d+105=4d-16+11d\\\\15d-4d-11d=-16-105\\\\0=-121$

no solution

You might be interested in

Please help !!!!!!!!!!!

shusha [124]

Answer is C have fun

4 0

3 years ago

Let x be the amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train. Suppose that the d

larisa [96]

Answer:

a) $P(X$

$P(X>14) = 1-P(X$

b) $P(7< X$

c) We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

Step-by-step explanation:

For this case we define the random variable X as he amount of time (in minutes) that a particular San Francisco commuter must wait for a BART train, and we know that the distribution for X is given by:

$X \sim Unif (a=0, b =20)$

Part a

We want this probability:

$P(X$

And for this case we can use the cumulative distribution function given by:

$F(x) = \frac{x-a}{b-a} = \frac{x-0}{20-0}= \frac{x}{20}$

And using the cumulative distribution function we got:

$P(X$

For the probability $P(X>14)$ if we use the cumulative distribution function and the complement rule we got:

$P(X>14) = 1-P(X$

Part b

We want this probability:

$P(7< X$

And using the cdf we got:

$P(7< X$

Part c

We want to find a value c who satisfy this condition:

$P(x$

And using the cumulative distribution function we have this:

$P(x$

And solving for c we got:

$c = 20*0.9 = 18$

3 0

3 years ago

Need help with this question.

bonufazy [111]

10 meters by 3 meters

P= 10+10+3+3=26
A= 10×3=30

hope this helps :)

8 0

4 years ago

Describe these points with a double inequality

german

Answer:

-3 < x ≤ 13

Step-by-step explanation:

the filled circle is the less/greater than or equal to sign and the open circle is a less/greater than sign.

8 0

3 years ago

What's the answer to this geometry problem

lubasha [3.4K]

The answer is A
B and D are not answer as they show50-x=50
so x have to be 15 or 5 in A and C
but in C x=5 but 2×x+50 is nt equal to 70
so it is A

7 0

3 years ago