Answer:
(3x - 7y)(3x + 7y)
Step-by-step explanation:
9x² - 49y² ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
here 9x² = (3x)² ⇒ a = 3x and 49y² = (7y) ⇒ b = 7y
9x² - 49y²
= (3x)² - (7y)² = (3x - 7y)(3x + 7y)
First, since Kim has already read 2 pages you subtract 44-2. Now you only have to divide 42 by 20 which is 2.1 hours. 2.1 hours is the equivalent of 2 hours and 6 minutes.
Answer:
Step-by-step explanation:
The area (A) of a rectangle is equal to the length (L) of one of its sides times its width (w)
(eq. 1)
And its perimeter can be calculated with the next formula:
P=2(L+w) (eq. 2)
Solving for <em>w </em>in eq. 1, and plugging it into eq. 2
(eq. 3)
(eq. 4)
We know that A=49m^2, plugging in this value into eq. 4, we finally get into the answer:
If the length of the rectangle is larger than its width:
We know that a length can't be negative value, so the only valid interval is L>7. The domine of P is then:
L>7
Answer:
185.68 for perimeter
1652.16 for area
Step-by-step explanation:
Please give me brainliest i hope you do well.!
Step-by-step explanation:
Area of Square picture = 20.25 in²
Side lengths of Square picture
= √(20.25 in²) = 4.5 in.
Therefore the dimensions of the picture
is 4.5in by 4.5in.