Number of red marbles in bag = r. b = 10-rProbability of first marble being red: r/10Second marble being red: (r-1)/9total probability = 2/15 = (r-1)*r/90r = 4b = 6
Answer:
3
Step-by-step explanation:
15 - 2(7 - x) = 7
collect like terms
-2(7 - x) = 7 - 15
-2(7 - x) = -8
divide both sides by -2
7 - x = -8/-2
7 - x = 4
collect like terns
-x = 4 - 7
-x = -3
dividing both sides by -
x = 3
c. 35 sq. units
how you get that is you multiply
5 x 14 = 70
then divide by 2
70 divided by 2 = 35
formula
base x height divided by 2 = area of triangle (remember to square it also)
The answer to your question is "1,200 cm".
To answer this problem, you have to have a good foundation in factoring polynomial expressions. It has to be taken into account the knowledge in division and fractions.
The expression
(y+7)^2 - 100
can be factored as
[ (y+7) + 10 ] [ (y+7) - 10 ]
Further simplifying the expressions
[ y + 7 + 10 ] [ y + 7 - 10 ]
( y + 17 ) ( y - 3)
So the product of two linear binomials is
(y+17)(y-3)