Answer:
21
Step-by-step explanation:
the pattern is plus 6
Answer:
9y
Step-by-step explanation:
Mathematicaly, the product of 9 and a number "y" is:
9y
Answer:
112
Step-by-step explanation:
2(-3+63)-4(2)
112
Answer:
A (361)
Step-by-step explanation:
A "perfect square trinomial" has the form
ax^2 + 2ab + b^2. If a happens to be 1, which it is in the given x^2 − 19x + c, then 2(1)(b) = - 19. Solving for b, we get b = -19/2.
Then b^2 in the general "perfect square trinomial" is the same as c: (-19/2)^2, or 90.25, or 90 1/4, or 361/4/
Choosing A (361) makes the given expression a perfect square trinomial.
From the equation we have :
-3x-5y=-15-3x-3y <=> -5y = -15-3y<=> 15= 5y-3y <=> 2y= 15 <=> y=15/2
We also have:
-3x-5y =-3. Given y= 15/2 => -3x -5(15/2)=-3 <=> -3x = -3x +5(15/2) = 34.5 <=> x = 34.5/3 =23/2 = 11.5