Translate into mathematical expressions and Find the number.
Enter numeric answers. Use x as variable.
Five less than a number is seventeen
x-5 =17
x=17+5
x= 22 numeric answer
The total of twice a number and six is fourteen
2x + 6=14
2x + 6 - 6 = 14 - 6
2x / 2 = 8 / 2
x = 4 numeric answer
Twice the total of a number and three is fifteen
2(x + 3) =15
2x + 6 = 15
2x + 6 - 6 = 15 - 6
2x + 0 = 9
2x / 2 = 9 / 2
x = 4.5 numeric answer
Three more than three times a number is seven
3+3x = 7
3 - 3 + 3x = 7 - 3
0 + 3x = 4
3x / 3 = 4 / 3
x = 1 1/3 or 1.33
The product of five less than a number and two is six
(x - 5) 2 = 6
2x - 2 X 5 = 6
2x - 10 = 6
2x - 10 + 10 = 6 + 10
2x = 16
2x / 2 = 16 / 2
x = 8 numeric answer
Are these numeric answers correct ?
2007-11-14 11:58:38 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
On the last one, even though the answer is correct, that is by accident, your approach was incorrect. You should have done:
(3 + 2x) * 2 = 14
(3 + 2x) = 14 / 2
3 + 2x = 7
2x = 7 - 3
2x = 4
x = 4 / 2
x = 2
2007-11-19 07:00:44 · answer #1 · answered by Gina 3 · 1⤊ 0⤋
They're pretty much correct. For #3, it also could be 4 1/2 or 9/2.
For #3, make sure you don't put 1.33 unless it asks you to round to the nearest hundredth. It's 1 1/3, 4/3, or 1.3 repeating. (The little dash mark above the 3.)
Haha, Algebra, those were the days...
2007-11-14 12:04:10 · answer #2 · answered by Chris 3 · 0⤊ 1⤋
Yes they're correct! Congratulations!
2007-11-14 12:02:47 · answer #3 · answered by L.E. 6 · 0⤊ 1⤋
Yes. all are correct. Good work!
2007-11-14 12:02:56 · answer #4 · answered by ironduke8159 7 · 0⤊ 1⤋
seems you got the answers. if you need approval you got it.
2007-11-14 12:08:37 · answer #5 · answered by charlie e 2 · 0⤊ 1⤋