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vovikov84 [41]
3 years ago
7

Which of the following is true -(-9)=9 -(-5)=-5 -(10)=10

Mathematics
1 answer:
olchik [2.2K]3 years ago
6 0
-(-9)=9 is true because a negative to a negative is positive
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A LARGE RECTANGULAR POSTER IS 3 TIMES AS LONG AND 3 TIMES AS WIDE AS A SMALL RECTANGULA POSTER. THE SMALL POSTER IS 3 FEET LONG
umka2103 [35]

Answer:

the Larger poster is 9ft long by 6ft wide

Step-by-step explanation:

In order to find the length and width values of the large poster we first need to find the width of the smaller poster since we are already given the length. Since we are also provided with the perimeter we can add the length twice and subtract it from the perimeter which would give us the value of both width sides of the rectangle, then we simply divide by 2 to get the value of the individual width.

10ft = 3ft + 3ft + w + w

10ft = 6ft + 2w

4ft = 2w

2ft = w

Since the larger poster is 3 times as big for the length and the width we simply multiply the smaller poster's length and width by 3...

L = 3 * 3 = 9ft

W = 2 * 3 = 6ft

Finally, we can see that the Larger poster is 9ft long by 6ft wide

8 0
3 years ago
PLEASE HELP I've been struggling on this one :(
In-s [12.5K]

Answer: The answer is (x+2)(x-4)(x-4)
Or as a short form you can write it as
(x+2) (x-4)^{2}

Step-by-step explanation:

Answer is very lengthy but I am 100% sure that's the correct answer

6 0
1 year ago
Read 2 more answers
A national survey showed that 44% of college students drink. A professor provided his own survey by choosing a random sample of
mamaluj [8]

Answer:

It is an unusual result contradicting the national survey.

Step-by-step explanation:

National survey showed 44% of college students who drink.

The professor's survey showed that 96/244 = 39% drink.

The professor's survey deviated from the national survey is 5% (44% - 39%) representing about 0.25% (5% squared) variance.

Standard deviation is the spread of a set of numbers from their mean.  In other words, it measures how far an observed value is from the mean. It can be calculated by getting the square root of the variance.

4 0
3 years ago
PLEASE HELP FAST!!
Oduvanchick [21]

Answer:

x = 4

Step-by-step explanation:

10 = -1/4 x + 11

10 - 11 = -1/4 x

-1 = - 1/4 x

x = 4

7 0
3 years ago
Evaluate the expression when a=−2, b=3, and c=−8.<br><br> −ab3−ac=?
Rina8888 [55]

the anwser would be -2 because -2*3*3-2*8 equals -2

7 0
3 years ago
Read 2 more answers
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