Answer:
(B)21+3a
Step-by-step explanation:
An expression is said to be distributive when:
Given the algebraic expression: (7 + a)3
Applying the distributive property
An equivalent expression is 21+3a.
The correct option is B
x = the weight of one steel ball y = the weight of one brass ball 2x + 5y = 13 (2 + 2)x + (5 - 2)y = 12 by solving the above system of equations we find:
x = 1.5 lbs y =2 lbs one steel ball weighs 1.5 lbs.one brass ball weighs 2 lbs.
Answer:
They are equal
Both answer is 65
Step-by-step explanation:
5x -30 = 2x +27
5x -2x = 27 +30
3x = 57
x = 57/3 = 19
5x -30 = 5(19) -30 = 65
2x +27 = 2(19) +27 = 65
Answer:
x = 110, y = 153.
Step-by-step explanation:
4x - 3y = -19 Multiply by 2
3x - 2y= 24 Multiply by 3.
8x - 6y = -38
9x - 6y = 72 SUBTRACT
-x = - 110
x = 110
Substitute for x :
3(110) - 2y = 24
2y =330 - 24
2y = 306
y = 153.
