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miv72 [106K]
2 years ago
12

Using a number line, find both the intersection and the union of the following intervals: (−3, +∞) and (4, +∞)

Mathematics
1 answer:
sammy [17]2 years ago
3 0

Answer:

The intersection of the two intervals = 4, 5, 6,.......+∞ = (4, +∞)

The union of the two intervals = -3, -2, -1, 0, 1, 2, 3, 4, 5,.....,+∞ = (-3, +∞)

Step-by-step explanation:

The given intervals are;

First interval  = (-3, +∞)

Second interval  = (4, +∞)

Using the number line, we therefore, the first interval includes, -3, -2, -1, 0, 1, 2, 3, 4, 5,.....,+∞

The second interval includes, 4, 5,.....,+∞

Which gives the intersection as 4, 5, 6,.......+∞

The union is the interval that combines the two sets of intervals which is given as follows;

The union of the two intervals = -3, -2, -1, 0, 1, 2, 3, 4, 5,.....,+∞

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If 9(1-x) = 27Y and x-y=-11/2, find the value of x + y.​
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Answer:

-2.25

Step-by-step explanation:

9(1-x) = 27Y

9-9x =27y

-9x -27y = -9  multiply all terms by -1

9x +27y =9   equation (1)

x-y= -11/2 equation (2)

by solving 2 equations

x= -3.875

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VladimirAG [237]
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Hence,
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3 years ago
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Use row operations to solve the system.
Aleks04 [339]

Answer:

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Answer:

18.84 meters.

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2 * 3.14 * 3 = 6 * 3.14 = 18.84.

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