Answer:
DNE.
Step-by-step explanation:
8x - 2y = 1 ---------------------(1)
-4x+ y = 3----------------------(2)
Multiply (2) by 2
-8x +2y = 6 -----------------(3)
Add (1) to (3)
8x - 2y + (- 8x + 2y) = 1+6
8x - 2y - 8x +2y = 7
But all the terms in LHS cancel out, leaving 0.
So you get 0=7, which is not valid.
Therefore no solution exists. DNE
THE ANSWER IS D
YOU HAVE AT TIME ZERO 10 BACTERIA,
AFTER 15 SEC YOU HAVE 20 BACT
AFTER 30 SEC THE NUMBER DOUBLES SO YOU HAVE 40 BACT
AFTER 45 SEC YOU YOU HAVE 80
AND SO ON, AFTER 120 SEC YOU HAVE 2560 BACT
Answer:
73
Step-by-step explanation:
-17a - 4b
-17(-5) - 4(3)
85 - 12
73
Answer:
(i) 2x = 2 × x. 3x2 = 3 × x × x. 4 = 2 × 2. The common factor is 1. (ii) 6abc = 2 × 3 × a × b × c. 24ab2 = 2 × 2 × 2 × 3 × a × b ...
Step-by-step explanation:
Answer:
Step-by-step explanation:
2x-20 = 44, because vertical angles are congruent
2x = 44+20, combine like terms
2x = 64, divide both sides by 2
x= 32