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lilavasa [31]
3 years ago
10

Sandra says that 90 divided by -9 equal 10. Is she correct ? Explain.

Mathematics
2 answers:
deff fn [24]3 years ago
6 0

Answer:

-10

Step-by-step explanation:

In multiplying and dividing if there is 2 negatives it is always a positive but if it is 1 negative and a positive it is always a negative. This is only for multiplying and dividing. So the answer is negative 10.

NikAS [45]3 years ago
3 0

Answer:

-10

Step-by-step explanation:

"--_dfhyrryuuyyyyyyyyyueui

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A rectangular enclosure is to be created using 82m rope.
atroni [7]
Let
x-----> the length of rectangle
y-----> the width of rectangle

we know that 
perimeter of rectangle=2*[x+y]
perimeter of rectangle=82 m
82=2*[x+y]---> divide by 2 both sides---> 41=x+y--> y=41-x---> equation 1

Area of rectangle=x*y
substitute equation 1 in the area formula
Area=x*[41-x]----> 41x-x²

using a graph tool
see the attached figure

the vertex is the point (20.5,420.25)
that means
 for x=20.5 m ( length of rectangle)
the area is 420.25 m²

y=420.25/20.5----> 20.5 m

the dimensions are
20.5 m x 20.5 m------> is a square

the answer part 1) 
<span>the dimensions of the rectangular with Maximum area is a square with length side 20.5 meters
</span>
Part 2)<span>b) Suppose 41 barriers each 2m long, are used instead. Can the same area be enclosed?
</span>divide the length side of the square by 2
so
20.5/2=10.25--------> 10 barriers
the dimensions are 10 barriers x 10 barriers
10 barriers=10*2---> 20 m

the area enclosed with barriers is =20*20----> 400 m²

400 m² < 420.25 m²
so

the answer Part 2) is 
<span>the area enclosed by the barriers is less than the area enclosed by the rope
</span>
Part 3)<span>How much more area can be enclosed if the rope is used instead of the barriers
</span>
area using the rope=420.25 m²
area using the barriers=400 m²

420.25-400=20.25 m²

the answer part 3) is
20.25 m²

6 0
3 years ago
Simple interest on a bank loan can be calculated by multiplying the principal times the interest rate times the time. In the for
prisoha [69]

I = interest/simple interest

So your answer is D.

5 0
3 years ago
Read 2 more answers
A basket of the fruit contains 12 apples, 8 bananas, and 6 oranges. What is the ratio of bananas to apples? (Please simplify)
mrs_skeptik [129]

Answer:

2 : 3

Step-by-step explanation:

bananas to apples = 8 : 12

simplify by dividing both values by highest common factor of 4:

8 ÷ 4 : 12 ÷ 4 = 2 : 3

6 0
2 years ago
PLS HELP ME ASAP FOR 17!! (MUST SHOW WORK!!/ STEPS!!) +LOTS OF POINTS!! *brainliest*
azamat
You must distribute first.
8 times (3x-2)= 24x-16
2 times (12x-5.5)= 24x-11
What you have left is
(24x-16)-(24x-11)
24x-24x=0
-16- -11=-5
The answer is -5
8 0
3 years ago
How wide is a rectangular garden with a length of 8 feet And an Area of 40 square feet
Lemur [1.5K]
5 feet wide
bc 5•8=40
6 0
3 years ago
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