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Vikki [24]
3 years ago
8

Is the following statement always, never, or sometimes true?

Mathematics
2 answers:
nlexa [21]3 years ago
7 0
We are given the following statement; A number raised to a negative exponent is negative. We can go through experimental points. In this case, when the number is positive, the result is also positive. If the number is negative, we can say the result is negative. 
pickupchik [31]3 years ago
3 0
Sometimes...

2^-3 = 1/(2^3) = 1/8

-2^-3 = 1/(-2^3) = -1/8
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Patty buys a new car and gets it appraised every few years. After owning the car for 3 years, its value is $15,000. After owning
zalisa [80]

Answer: 45,000.

Step-by-step explanation:

The equation of inverse variation is given by:-

k=xy

, where k is the constant of proportionality.

Given: After owning the car for 3 years, its value is $15,000. After owning the car for 5 years, its value is $9,000.

Here,

x_1=3,\ y_1=15000\\\\x_2=5,\ y_2=9000

Then, k=x_1y_1=3\times15000=45,000

or k=x_2y_2=5\times9000=45,000  [answer is same in both cases.]

Hence, the constant of proportionality in this inverse variation is 45,000.

3 0
3 years ago
A concession stand vendor counts the money in the register. after 2 h it has $82.75. after 6 h is has $ 360.75. how much money w
Volgvan
I believe the answer would be c. $499.75. If you take (360.75-82.75)/(6-2) you get 278/4 which is dollars/hour, and that =69.5 so the rate of increase is $69.50 per hour, therefore if 6 hours produced $360.75 then you +$69.50•2(hours) and get $499.75
4 0
3 years ago
What is the length of side BC of the triangle?<br> Enter your answer in the box.
Murljashka [212]

Answer:

28

Step-by-step explanation:

2x + 7 = 4x - 7

14 = 2x

x = 7

BC = 4x = 4(7) = 28

8 0
2 years ago
I need help with this<br> 2(5x+4)=
N76 [4]
4/5


2(5x+4)=

distribute the 2

10x+8=

subtract 8 from both sides

10x=8

divide 10 from both sides

x=8/10

simplify by 2

x= 4/5
7 0
3 years ago
Read 2 more answers
A rectangle has a links of 5" and a with of X inches write a equation to represent the perimeter of the rectangle explain your r
Zarrin [17]

Answer:

10+2x

Step-by-step explanation:

A rectangle has 4 sides. Two pairs of sides are congruent.

For example a rectangle could have sides of 6, 10, 6, and 10.

So the perimeter would be the sum of those sides, 6+6+10+10.

6+6+10+10 can be written like 2(6)+2(10)

For the rectangle in your question it would be 5+5+x+x, which can be written like 2(5)+2(x)

Simplify to 10+2x.

8 0
4 years ago
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