altogether there are 7 marbles in the bag.
put the marbles in fractions, so blue would be 3/7
and red would be 4/7. but becuase you need 2 of the same, you do
3/7 x 3/7 = 9/49
4/7 x 4/7 = 16/49
then add them togther
25/49
if you need it as a percentage, it is
51.020408163265%
The sum of the expression (–x² + x) and (x² – 3x – 1) will be –2x – 1. Then the correct option is D.
<h3>What is Algebra?</h3>
The analysis of mathematical representations is algebra, and the handling of those symbols is logic.
The expression can be written as
(–x² + x) and (x² – 3x – 1)
Then the sum of the expression (–x² + x) and (x² – 3x – 1) will be
(–x² + x) + (x² – 3x – 1) = –2x – 1
Then the correct option is D.
More about the Algebra link is given below.
brainly.com/question/953809
#SPJ1
True!
all parabolas with vertical directrix DO open to the left/right.
5x-6=10-3x
5x=10-3x+6
5x+3x=10+6
8x=16
x=16÷8
x=2
Very sorry if the answer is wrong but im quite sure that the answer is (D)
proof:
(5×2)-6=10-(3×2)
10-6=10-6
4=4
So if my mental culculations are correct, the answer is (D)
