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4 years ago

My son has the following missing number pattern to solve.

2 answers:

6 0

The only complete pattern is the middle one
we see that 38-29=9
so the middle number minus the first number equals the third number
for the last row
21-1=20 so you have 1 21 20
for the first one

17- ?=37
54-17=37 54 17 37

alexandr402 [8]4 years ago

3 0

For the first one is 1,21,20

The second one is 54,17,37

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A 10.0 kg and a 2.0 kg cart approach each other on a horizontal frictionless air track. Their

Flura [38]

the final speed in m/s of the 10.0 kg is 2.53 m/s .

Step-by-step explanation:

Here we have , A 10.0 kg and a 2.0 kg cart approach each other on a horizontal friction less air track. Their total kinetic energy before collision is 96 ). Assume their collision is elastic. We need to find What is the final speed in m/s of the 10.0 kg mass if that of the 2.0 kg mass is 8.0 m/s . Let's find out:

We know that in an elastic collision :

⇒ Total kinetic energy before collision = Total kinetic energy after collision

⇒ $96 = \frac{1}{2}M_1(v_1)^2 + \frac{1}{2}M_2(v_2)^2$

⇒ $96 = \frac{1}{2}(10)(v_1)^2 + \frac{1}{2}(2)(8)^2$

⇒ $96=5(v_1)^2 + 64$

⇒ $5(v_1)^2 =32$

⇒ $(v_1)^2 =6.4$

⇒ $v_1 =2.53 m/s$

Therefore , the final speed in m/s of the 10.0 kg is 2.53 m/s .

8 0

3 years ago

Help please!!! thanks

Rom4ik [11]

Answer:

Step-by-step explanation:

first we can simplify by dividing by r

$\frac{9 {r}^{2} }{r} = \frac{9 \times r \times r}{r} = 9 \times r \times 1 = 9r$

the r on the bottom of the fraction will cancel out one of the r's on top, this happens because anything divided by itself is 1, thus r divided by r is 1

finally we can evaluate when r =3,

9r = 9(3) = 27

3 0

3 years ago

X+2y=6 2x+4y=12 I need to use substitution to solve, may anybody help?

lana66690 [7]

$x + 2y = 6$

$x = - 2y + 6$
$2( - 2y + 6) + 4y = 12$
then find y and plug that y value into one of the original equations to find x

Hope this helps!

7 0

3 years ago

You start at (2, -1). You move right 3 units and up 4 units. Where do you end?

vovangra [49]

Answer:

(5,3)

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

The least common multiple of two whole numbers is 12. The ratio of the

Pani-rosa [81]

Answer:

Step-by-step explanation:

Let the larger number = 6

Let the smaller number = 4

Ratio

The greater number = 6

The smaller number = 4

The ratio is 6/4 = 3/2

Isn't that a bit amazing? If you multiply 6 * 4 you get 24. You would think that that is the lowest common multiple. It isn't.

6: 3 * 2

4: 2 * 2

The lowest common multiple is one with 1 three and 2 twos.

4 0

3 years ago