Answer:
2
Step-by-step explanation:
Because they are using the number line: 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Can’t see the image above
Answer:
X = 14 kg
Y= 7 kg
Step-by-step explanation:
LET X and Y equal the amounts of brand X and Y
X = kg of brand X
Y = kg of brand Y
we know:
1) X + Y = 21 (kg)
2) 1X + 4Y = 2(X + Y) (This is the cost/kg * amounts for total cost)
Coefficients 1,4,2 are the cost/kg)
substitute eq. 1 (X+Y), = 21 into right side of equation 2
1X + 4Y = (21)*2
use elimination to solve 2 equations
X + Y = 21
X + 4Y = 42 (now subtract, note: I wrote the 1X as just X)
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0 -3Y = -21 OR Y = 7 kg so X = (21-7) OR X = 14 kg
Answer:
D
Step-by-step explanation:
Since a <em>fraction</em> is a division problem, you can do every answer and compare them until you get them in order, which D is the most reliable.
