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3 years ago

Evalute 5x + 4y; if x = 3 and y = 2 O 54 O 22 ОО 95 23

Mathematics

2 answers:

Yanka [14]3 years ago

7 0

The answer is 23 becuase 15+8=23

Masja [62]3 years ago

5 0

Answer:
23

Explanation:
5(3)+4(2)
15+8
you have to plug in the numbers to the given variable. like how x is 3 and y is 2 if that makes sense im not good at explaining math

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A ball is thrown into the air and its position is given by h ( t ) = − 6.3 t 2 + 53 t + 24 where h is the height of the ball in

nordsb [41]

Answer:

$h'(t) = -12.6 t +53$

Now we can set up the derivate equal to 0 and we have:

$-12.6 t +53 = 0$

And solving for t we got:

$t = \frac{53}{12.6}= 4.206$

For the second derivate respect the time we got:

$h''(t) = -12.6$

So then we can conclude that t = 4.206 is a maximum for the function.

And the corresponding height would be:

$h(t=4.206) = -6.3(4.206)^2 +53*4.206+24= 135.468 ft$

So the maximum occurs at t = 4.206 s and with a height of 135.468 m

Step-by-step explanation:

For this case we have the following function:

$h(t) = -6.3t^2 +53 t+24$

In order to maximize this function we need to take the first derivate respect the time and we have:

$h'(t) = -12.6 t +53$

Now we can set up the derivate equal to 0 and we have:

$-12.6 t +53 = 0$

And solving for t we got:

$t = \frac{53}{12.6}= 4.206$

For the second derivate respect the time we got:

$h''(t) = -12.6$

So then we can conclude that t = 4.206 is a maximum for the function.

And the corresponding height would be:

$h(t=4.206) = -6.3(4.206)^2 +53*4.206+24= 135.468 ft$

So the maximum occurs at t = 4.206 s and with a height of 135.468 m

8 0

3 years ago

What is the probability of randomly selecting a month pf year and not getting a month that ends in y?

Umnica [9.8K]

Answer:

2/3

Step-by-step explanation:

The months whose names end in 'y' include Jan, Feb, May, Jul. The probability of randomly selecting a month whose name ends in 'y' is 4/12 (remember that there are 12 months in a year), or 1/3.

Thus, the probability of selecting a month whose name does NOT end in 'y' is 8/12, or 2/3. Note that this event is the 'complement' of the first event:

P(name does not end in 'y') = 1 - P(name does not end in 'y') = 1 - 1/3 = 2/3

8 0

2 years ago

Becky tells her friend about the Rule of 72 and her friend immediately

yaroslaw [1]

Answer:

a. the investment earns 4%

b. yes

Step-by-step explanation:

The "rule of 72" says that an investment earning compound interest at x% will double in value after 72/x years. That is, ...

f(x) = 72/x

We interpret f(4) to mean Becky's friend is interested in the doubling time for an investment that earns 4% interest.

Using the above formula, ...

f(4) = 72/4 = 18

The friend's math is correct.

3 0

2 years ago

Helpmehhhhhhhh plzzzzzzzzzzz

valentinak56 [21]

8 is 53.8
Cuz 66.93-6.57x2= 53.78 rounded to the nearest tenth 53.8

3 0

3 years ago

What is the largest x where f(x) is discontinuous<br> show work

natulia [17]

Answer:

x = 3

Step-by-step explanation:

reverse foil the denominator and find the largest solution.

x-3(x+1)

3 is the largest solution

6 0

2 years ago