Answer:
–4
Step-by-step explanation:
observe
2x² + 8x = x² – 16
x² + 8x + 16 = 0
(x+4)² = 0
x + 4 = 0
x = –4
Answer:
Let,x be the total number of examinees:-
We have,
Hence,required number of examinees = 360 .
Answer:
x=12 ADB= 56 BDC= 54
Step-by-step explanation:
ADB and BDC are complementary, so they add up to 90 degrees. In other words ADB+BDC= 90 So I can input my knowns into the equation
(3x+10) + (4x-4) = 90
I combined like terms to give me 7x+6=90
Then I subtract 6 from both sides giving me 7x=84
Last I divide 7 on both sides. x=12
Then I input the x (12) into the equation and solve it from there
3(12)+10 and 4(12)-4
3(12)+10=56
4(12)-4=54
. . . I think. Hope this helps!
Answer:
1.6
i think
Step-by-step explanation:
Are they all on the same straight road?
If they are and the library is between his house and the school then the distance from the library to the school is 4/5 - 3/8 = 32/40 - 15/40 = 17/40 miles.
If they are on the same road but in opposite directions from his house then the distance is 3/8 + 4/5 = 32/40 + 15/40 = 47/40 miles.
If they are not on the same straight road then we cannot work out the distance exactly but it must be between 17/40 and 47/40 miles as these are the best and worst case examples.