Expand and simplify 6(2x - 3) - 2(2x + 1)
2 answers:
Answer: 8x - 20
Explanation: To simplify the problem you see here, we are going to use both the distributive property and combining like terms.
But before we do anything, we need to change
these minus signs to plus negatives.
Now we can distribute the 6 through the first set of parentheses
and the -2 through the second set of parentheses.
That gives us 6(2x) or 12x + 6(-3) or -18 + -2(2x)
which is + -4x + -2(1) which is + -2.
Now we can combine like terms.
12x + -4x is 8x and -18 + -2 is -20.
So 8x - 20 is our final answer.
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Answer:
30% students
Step-by-step explanation:
Let x be the number of total students of a school.
63% are girls then total number of girls = (0.63)x
37% are boys then total number of boys = ( 0.37)x
Now 23% of girls wear contacts then total number of girls
= (0.63x) × 0.23
= (0.1449x)
And 42% of boys wear contacts then total number of boys wearing contacts
= (0.37x) ( 0.42)
= (0.1554)x
Total students wears contacts = ( 0.1449x) + (0.1554x)
= (0.3003x)
Percentage of students wear contacts = × 100
= × 100
= 30%
All 30% students wear contacts.
The formula for circumference is 
.
To express the circumference exactly, plug the diameter in for
and put the 
symbol in front of it. Don't multiply. This expresses the exact circumference.
Say you have the diameter of 17.
You can express the circumference with 17.
To express the circumference exactly, plug the diameter in for
Say you have the diameter of 17.
You can express the circumference with 17