2x(x-3) - 3x (4x-1)
First I like to change subtraction to addition of the opposite.
2x(x+ -3) + -3x (4x + - 1)
Now distribute
2x^2 + -6x + -12^2 + 3x
Now combine everything
-10x^2 - 3x
Answer: 7
Step-by-step explanation:
It's a 1 : 3 ratio so the answer should be 7
Answer:
6 kg
Step-by-step explanation:
Given is weight of an object directly varies with the mass of the object .
Let the constant of proportionality be k
So,
Weight = K×(mass of the object)
For an object , weight = 45 N
mass = 9 kg
So , 45 = K×9
K = 5.
Now, for the other object ,
Weight = 30 N. K = 5 (as obtained above)
So, 30 = 5×(mass of the object)
mass of the object = 6 kg
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Step-by-step explanation:
6
Answer:
18
Step-by-step explanation:
5 scores so far + next quiz =6 scores
6 times 16=96
She has to get a quiz score sum of 96 to get an average of 16
18+15+16+14+15=78
96-78=18