Make equal to 0
minus 12from both sides
x^2+10x+13=0
we can't factor so use quadratic formula
x=

x=

x=

x=

x=

x=

x=

or

aprox
x=-1.5359 or -8.4641
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72 is 15% of 480. if you divide 72 by 480 it gives you .15 and then you mutiply the .15 by 100
Answer:
12.
Square root = 37,
Step-by-step explanation:
40^2 = 1600
35^2 = 30 * 40 + 25 = 1225
So the requred square is between 35 and 40
38^2 = 1444
37^2 = 1369 - so its this one.
Required difference = 1381 - 1369 = 12.
Answer:
1) 1/6, 1/3, 1/2, 3/4
2) 3/10, 2/5, 7/10, 4/5
3) 1/4. 7/12. 2/3, 5/6
4) 4/15. 11/30, 2/5, 7/10
Step-by-step explanation: Either convert all in a set to a common denominator, or convert to decimal fractions.