The circumference 1 = π*D=8π
if D=4, the circumference 2 =4π=1/2* the circumference 1
⇒ a is the answer
Answer:
8000
Step-by-step explanation:
The number will be ...
(400 m^2)/(500 cm^2) = 0.8 (m/cm)^2 = 0.8 ((100 cm)/(1 cm))^2
= 0.8·100^2 = 8000
Fiona can cut 8000 rectangles from the plastic sheeting she bought.
Answer:
(2,3),(4,3),(-2,-3),(-4,-3)
Explanation:
The x value can not repeat but the y value can
Answer:
Cost of Hats = $15
Cost of Scarves = $8
Step-by-step explanation:
Let
Cost of Hats = x
Cost of Scarves = y
5x + 3y = 99 (1)
3x + 5y = 85 (2)
Multiply (1) by 5 and (2) by 3
25x + 15y = 495
9x + 15y = 255
Subtract
25x - 9x = 495 - 255
16x = 240
Divide both sides by 16
x = 240 / 16
= 15
x = $15
Substitute x = 15 into
5x + 3y = 99
5(15) + 3y = 99
75 + 3y = 99
3y = 99 - 75
3y = 24
y = 24/3
= 8
y = 8
Cost of Hats = $15
Cost of Scarves = $8
Answer:
Jane is not correct.
Step-by-step explanation:
Jane must have complete several examples using positive numbers. That conclusion does not apply for negative numbers.
Let's see an example:
Given the number 5:
- its opposite number is: -5
- the opposite of this opposite number: is 5
Note that is the same number and it is positive.
However, if we check the same situation with a negative number:
Given the number -3:
- its opposite number is: 3
- the opposite of this opposite number: is -3
In conclusion, Jane's conclusion is wrong. The opposite of the opposite number is not always a positive number.
