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3 years ago

11

Drisen has 6 groups of trains. Each group has 3 trains in it. What addition number sentence would help him solve how many trains

he has in all? *

1 answer:

Nimfa-mama [501]3 years ago

4 0

Answer:

6x3=x

x=18

Step-by-step explanation: plzz mark brainliest

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2. Find the sum of the digits of each multiple of 9 below.

FrozenT [24]

Answer:

Step-by-step explanation:

Take the sum of each answer and add the two digits together.
9.2=18 1+8=9

9.3=27 2+7=9

9.4=36. 3+6=9

The sum of the digits added together will always equal 9

4 0

2 years ago

Explorers on a planet with a thin atmosphere want to measure the acceleration of gravity at its surface. So they use a spring gu

Murljashka [212]

Answer:

The value of $g_s$ is $g_s=\frac{30}{21} \:\frac{m}{s^2}$ .

Step-by-step explanation:

We know that the position function is given by

$s(t)=30t-\frac{g_s}{2} t^2$

Velocity is defined as the rate of change of position. Therefore,

$v(t)=\frac{d}{dt}(s(t))$

So, the velocity function is

$v(t)=\frac{d}{dt}(s(t))\\\\v(t)=\frac{d}{dt}(30t-\frac{g_s}{2} t^2)\\\\\mathrm{Apply\:the\:Sum/Difference\:Rule}:\quad \left(f\pm g\right)'=f\:'\pm g'\\\\v(t)=\frac{d}{dt}\left(30t\right)-\frac{d}{dt}\left(\frac{g_s}{2}t^2\right)\\\\v(t)=30-g_st$

When a body reaches a vertical velocity of zero, this is the maximum height of the body and then gravity will take over and accelerate the object downward. Thus,

$v(t)=30-g_st=0\\\\g_s=\frac{30}{t}$

We know that the ball bearing reaches its maximum height 21 seconds after being launched (t = 21 s).

So, the value of $g_s$ is $g_s=\frac{30}{21} \:\frac{m}{s^2}$ .

5 0

3 years ago

Which correlation coefficient indicated the strongest linear relationship between the variables?

Anna35 [415]

Answer:

-0.87 has the strongest linear relationship

Step-by-step explanation:

-0.87, since it is the closest value to either one or negative one,

0.8 is the second strongest

0.65 is the third strongest

-0.52 is the least strongest

7 0

3 years ago

Find the value of x.<br><br> help pls !

Ad libitum [116K]

Answer:

68

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Y-4x=3 in slope intercept form

Alecsey [184]

Step-by-step explanation:

y - 4x = 3

Writing in slope intercept form that is y = mx + c

y = 4x + 3

Hope it will help :)

4 0

3 years ago

Read 2 more answers