Answer:
A
Step-by-step explanation:
Let the two sides of the rectangle be x and y.
Then the perimeter will be:
Since the perimeter is 54:
We know that one side of the rectangle is 3 inches <em>shorter</em> than the other.
Let y be the shorter side. It is 3 <em>less </em>than x.
Therefore:
Then by substitution, we acquire:
The answer is A.
Answer:
In the first one answer is r²
In second one answer is 3
Step-by-step explanation:
Yes it is Algebra with different powers
In first one (6r4+4r) +(__- 2r4 + 3r) = 4r4 + r2 + 7r
Like terms are added:
6r^4- 2r^4 + 4r + 3r +____ = 4r^4 + r2+ 7r
4r^4+7r +___ = 4r^4 + r^2 + 7r
Therefore ___ = r^2
In second one:
(__ -8x - x^2)-(4x^2 -7 +6x) = -5x^2 +14x +10
Open the brackets
__ -8x - x^2-4x^2 +7 -6x = -5x^2 +14x +10
Add like terms
__ -14x -5x^2 + 7= -5x^2 +14x +10
Therefore
___ + 7 = 10
___ = 10 -7 = 3
Answer:
7/30
Step-by-step explanation:
10 beads 3 red 1st red prob = 3/10
now there is 9 beads 7 blues 2nd blue prob = 7/9
3/10 * 7/9 = 21/90 = 7/30