Substitute each value of x, calculate, and if the answer equals to the given value of y, then the point does lie on y = 2x
Point A (1, -1)
y = 2(1)
y = 1
The answer is not y = -1 as given in the question, hence point A does not lie on y = 2x
-----------------------------------------------------------------------------------------------------------
Point B (1, 3)
y = 2(1)
y = 2
The answer is not y = 3 as required, hence point B does not lie on y = 2x
---------------------------------------------------------------------------------------------------------------
Point C(-2, -4)
y = 2(-2)
y = -4
The answer is y = -4 as required. Hence, point C does lie on y = 2x
-----------------------------------------------------------------------------------------------------------------
Point D(-2, 4)
y = 2(-2)
y = -4
The answer is not y = 4 as required, so point D does not lie on y = 2x.
---------------------------------------------------------------------------------------------------------------
Correct Answer: C
The area of a rectangle is its <u>length x width</u>.
The perimeter of a rectangle is its <u>length + length + width + width</u>.
Let's have l stand for length and w for width. A will stand for area and P for perimeter. This gives us:
399 = l x w
80 = 2l + 2w We can divide both sides of this equation by 2 to get <u>40 = l + w</u>.
Now we need to find two numbers whose sum is 40 and product is 399.
Fitting some random numbers in gives us the numbers 19 and 21 for the length and width.
Heres a answer for your question
Answer: 372 inches
Step-by-step explanation:
Given that :
Width = 8 feets
Length = 7 1/2 feets
The inches of fencing needed is obtained by calculating the perimeter of the garden :
Perimeter of rectangle (p) : 2(length + Width)
P = 2(7 1/2 + 8)
P = 2(15 1/2)
P = 31 feets
1 foot = 12 inches
31 feets = (12 * 31 ) = 372 inches
Both the negative and positive counterparts of a number have the same absolute value, or distance from 0.
The two numbers are 16 and -16.
They both have the same absolute value, 16.