9514 1404 393
Answer:
Step-by-step explanation:
When x represents the number, "the sum of 3 and a number" is (x+3). Twice that sum is 2(x+3). "Is 30" means this expression is equal to 30:
2(x +3) = 30 . . . . an equation for the given conditions
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We can solve this equation by dividing by 2:
x + 3 = 15
x = 12 . . . . . . subtract 3
The number is 12.
Answer:
option B
Step-by-step explanation:
(6x^2-x+8) - (x^2+2)
6x^2-x+8 - x^2-2
5x^2-x+6
Answer:
x=-1 y=4 (-1,4)
Step-by-step explanation:
Answer:
is C 4,816
Step-by-step explanation:
four thousand is 4,000 eight hundred is 800 sixteen 16
4000+800+16=4,816