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Lapatulllka [165]
3 years ago
7

Find the lcm 15 and 20​

Mathematics
2 answers:
son4ous [18]3 years ago
7 0
Answer: 60
Solution:
15 20
/ \ / \
3 5 2 10
/ \
2 5
3*5*2*2=60
Anestetic [448]3 years ago
5 0

Answer:

5

Step-by-step explanation:

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(2x + 3)" and solve for x
Novosadov [1.4K]

Answer:

2x−3=x

Move all terms containing x

to the left side of the equation.

Subtract x

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2x−3−x=0

Subtract x

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x−3=0

Add 3

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x=3

7 0
3 years ago
What is the equivalent ratio of 9 to 12? <br>​
liraira [26]

Answer:

3:4

Step-by-step explanation:

divide 9 by 3 and 12 by 3

7 0
3 years ago
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1. X/5 + 6 &lt;2*<br> A.X&gt; 20<br> B.X-20<br> C.x&lt;-20<br> D.x&lt;20
jonny [76]

Answer:

C. x←-20

Step-by-step explanation:

  • 2-6=-4
  • -4•5=-20
5 0
3 years ago
A piece of ribbon is cut into 3 different pieces A, B and C. The ratio of the length of A to the length of B is 3 : 4. The ratio
dusya [7]

Answer:

Step-by-step explanation:

\frac{A}{B}:\frac{3}{4}   and   \frac{B}{C}: \frac{8}{9}  and we are told that C is 6cm longer than A.  That means that C = A + 6.

We are going to cross multiply each one of those ratios.  The first one gives us

4A = 3B  and the second one gives us

9B = 8C.  But since C = A + 6, then

9B = 8(A + 6) and

9B = 8A + 48 and

Now we will solve the first equation above for A:

If 4A = 3B, then

A=\frac{3}{4}B and will use that as a sub for A in the second equation:

9B=8(\frac{3}{4}B)+48  and

9B = 6B + 48 and

3B = 48 so

B = 16.

Now that we know B, we can use it to solve for A:

4A = 3(16) and

4A = 48 so

A = 12.

Then we can use that all the way back in the expression we set up for C:

C = A + 6 so

C = 12 + 6 so

C = 18

12 + 16 + 18 is the length of the string: 46cm

3 0
3 years ago
In two or more complete sentences describe how to determine the appropriate model for the set of data, (0,2), (2,3), (5,4), (10,
11Alexandr11 [23.1K]
When you have a set of data points and you want to get a model out of it, you do data fitting. The first thing to do is plot the points using a scatter plot type of chart as shown in the picture. I used MS Excel as a tool for data fitting. On the left side of the picture, I used linear fitting. Then, it gives you the linear equation y=0.2907x + 2.2643. It has a correlation coefficient, R^2, of 0.9595. This measures how good your data fits the model equation. The closer it is to 1, the better. However, it is rare to get 1 because that is very ideal. A R^2 of 0.9595 is very satisfactory already. But if you want an even better model, the right side of the picture shows data fitting on a quadratic equation with an equation of y=0.0209x^2 +0.506x+2.0232 with R^2 of 0.9992.

3 0
3 years ago
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