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geniusboy [140]
3 years ago
9

If the statement "If the sun is shining, then it's not raining" is assumed to be true, is its reverse, "If it's not raining, the

n the sun must be shining," also always true?
Mathematics
2 answers:
Wewaii [24]3 years ago
7 0

Answer:

No this is not always true.

Step-by-step explanation:

If the statement "If the sun is shining, then it's not raining" is assumed to be true, is its reverse, "If it's not raining, then the sun must be shining,"

No this is not always true.

Let s suppose,

A = The sun is shining  

B = It's not raining.  

The the statement "If the sun is shining, then it's not raining" translates in mathematical terms to :  

If A then B or A => B  

However if A => B is true then B => A may or may not be true as have too little information.  

So we cannot always say that "If it's not raining, then the sun must be shining,"

madreJ [45]3 years ago
3 0
No, because it might be cloudy instead.

This is just like the statement, "All squares are rectangles" yet "All rectangles are squares" is not true.
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Rodney is given twi equations:x-y=11 and 2x+y=19
lozanna [386]

Answer:

x= 10 and y= -1

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Rewrite your second equation Y= -2x+ 19 then plug it into the first equation.

x- (-2x + 19) = 11

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3 0
3 years ago
Find the area of the trapezoid below.
Pani-rosa [81]

Answer: 54 cm²

Step-by-step explanation: In this problem, we're asked to find the area of the trapezoid shown. A trapezoid is a quadrilateral with one pair of parallel sides.

The formula for the area of a trapezoid is shown below.

Area =\frac{1}{2} (^{b} 1 + ^{b}2)h

The <em>b's</em> represent the bases which are the parallel sides and <em>h</em> is the height.

So in the trapezoid shown, the bases are 6 cm and 12 cm and the height is 6 cm. Plugging this information into the formula, we have \frac{1}{2} (6 cm +12cm)(6 cm).

Next, the order of operations tell us that we must simplify inside the parentheses first. 6 cm + 12 cm is 18 cm and we have \frac{1}{2}(18 cm)(6 cm).

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So the area of the trapezoid shown is 54 cm².

7 0
3 years ago
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