Answer:
x= 5 answer this question.
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(n + 8) + (n - 12)
Get rid of the parenthesis.
n + 8 + n - 12
Note : the (12) turns into a negative because a negative times a positive is always a negative :)
Combine like terms.
(n + n) + (8 - 12)
Simplify.
2n - 4
~Hope I helped!~
Answer:
b. 30
Step-by-step explanation:
70 + (x + 80) = 180
180 - 70 - 80 = 30
x = 30
Answer:
remove parentheses by multiplying factors.
use exponent rules to remove parentheses in terms with exponents.
combine like terms by adding coefficients.
combine the constants.
Step-by-step explanation:
Answer:
a)
10 markers : 7 USD
24 markers : 14 USD
42 markers : 21 USD
b)
64 markers : 28 USD
Step-by-step explanation:
10 markers : 7 USD
24 markers : 14 USD
For 10 markers, the price is 7 USD;
For 14 additional markers, the price increased by 7 USD;
Following the pattern, an additional 18 markers would see the price further increase by 7 USD;
So:
24 + 18 = 42
42 markers : 21 USD
Then, an additional 22 markers would cost 7 USD more than this;
42 + 22 = 64
64 markers : 28 USD