Answer:
16
Step-by-step explanation:
30-14=16
The box contains 8 black marbles.
The question is asking about a box containing a total of 30 marbles, with the white marbles numbering 14 more than the black ones. So, we can first create an equation which equates the total number of marbles (30) to the sum of the black marbles and the white marbles. Let's denote the number of black marbles as B. The number of white marbles can then be expressed as B + 14.
Therefore, the equation would be: B + (B + 14) = 30, simplifies to 2B + 14 = 30.
To solve for B, subtract 14 from both sides of the equation so you have 2B = 16. Now, divide each side by 2 to solve for B, which gives us B=8.
Therefore, there are 8 black marbles in the box.
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2. A circle with a radius of 10cm has a circumference of...?
3. Calculate a circumference of a circle with a diameter of 13cm.
4. A circle has a diameter of 9.5cm.What is the distance around the circle?
How do you calculate the circumference of a circle?
When would you use 2nr?
When would you use nd?
Come up with your own examples(at least two) to show how to calculate the circumference of a circle.
1. The circumference of a circle is 2πr, and when we plug in 3 for r, we get 6π.
2. We'll use the same formula and plug in 10 for r, giving us 20π.
3. The formula we use in this case is πd, and when we plug in 13 for d, we get 13π.
4. Same formula from 3, we plug in 9.5 for d and get 9.5π.
5. You can calculate the circumference of a circle using 2 formulas, C=2πr (where r=radius and C=circumference) and C=πd (where d=diameter and C is circumference).
6. You use 2πr when the radius is given.
7. You use πd when the diameter is given.
8. 2 examples could be to use the 2 formulas.
Line
4
has a steeper slope.
Line A
N
Line B
X
-6
4
-2.
2
4
6
-2
4
-6
The steeper line is determined by comparing the slopes of the two lines. The line with the larger slope value is the steeper line. However, the actual slopes of Line A and Line B in the question are not provided.
From the question, it seems like there are two given lines - Line A and Line B but no specific data is provided about their slopes. Therefore, with the information given, we can't determine which line has the steeper slope. Essentially, the steeper line would be the one with the higher slope value when represented in the form: y = mx + c, where 'm' is the slope. For instance, if Line A had an equation of y = 2x +1 and Line B an equation of y = 4x + 1, Line B's slope is steeper because it has a larger 'm' value compared to Line A.
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