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3 years ago

Please answer WILL GIVE BRAINLIEST DO NOT EXPLAIN

Mathematics

1 answer:

irina [24]3 years ago

7 0

Which one do you want me to answer?? All of them?? Or what.....

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Motion and rate of change derivatives. Attached is the question and where I am stuck, I would really appreciate the help :)

barxatty [35]

Answer:

A. 3 < t < 9

Step-by-step explanation:

When the particle is moving to the right, the velocity is positive.

To find the velocity, take the derivative of s(t) with respect to t.

s(t) = -t³/3 + 13t²/2 − 30t

s'(t) = -t² + 13t − 30

Find when the velocity is 0.

0 = -t² + 13t − 30

0 = t² − 13t + 30

0 = (t − 3) (t − 10)

t = 3, 10

Check the sign of s'(t) in each interval.

0 < t < 3, s'(t) < 0

3 < t < 9, s'(t) > 0

The particle moves to the right when 3 < t < 9.

4 0

4 years ago

What is the length of point AC

hjlf

the length of point AC is 13.67cm

7 0

3 years ago

The sum of squares of three consecutive numbers is 77 find the numbers

ollegr [7]

Answer:

4,5,6 are the three consecutive numbers. 16, 25 and 36 are their squares.

Step-by-step explanation:

Let the three consecutive numbers be x, (x+1), (x+2)

Now, the squares of these three numbers are $x^{2} ,(x+1)^{2} ,(x+2)^{2}$

Sum = 77

∴by the problem ,

$x^{2} +(x+1)^{2}+(x+2)^{2} = 77\\x^{2} +(x^{2} +2x+1)+(x^{2}+4x +4) = 77\\x^{2} +x^{2} +2x+1+x^{2} +4x +4 = 77\\3x^{2} +6x+5 = 77\\3x^{2} +6x = 77-5\\3x^{2} + 6x = 72\\3x^{2} +6x-72= 0\\$

{Taking 3 common }

$x^{2} +2x- 24 = 0\\$

{By factorization}

$x^{2} +2x- 24 =0\\ x^{2} +6x-4x-24=0\\x(x+6)-4(x+6)=0\\(x+6)(x-4)=0\\$

Therfore,

$x= -6,4\\$

<em>X can't be negetive </em>

∴ $x =4\\x+1=5\\x+2=6$

The squares of the three consecutive numbers are 16, 25, 36

The three consecutive numbers whose sum is 77 are 4, 5, 6

3 0

4 years ago

An event sold $608 worth of tickets. Adult tickets cost $11 and children's tickets cost $6. If 68 tickets were sold, how many we

olga_2 [115]

Alright so what I got is 54 adults and 1 kid

8 0

4 years ago

Read 2 more answers

ILL GIVE BRAINLIST IF RIGHT ASAP

kondor19780726 [428]

Answer:

Because the side lengths of the triangles are proportional.

Step-by-step explanation:

I took geometry.

4 0

4 years ago

Please answer *WILL GIVE BRAINLIEST* DO NOT EXPLAIN

Please answer WILL GIVE BRAINLIEST DO NOT EXPLAIN