X^2 - 13 x = -36
add 36 to both sides
x^2 - 13x +36 = 0
figure out the factor
(x-4)(x-9) = 0
so (x-4) or (x-9) equals 0
so solution is
x-4=0 add 4 to both sides and get x = 4
x-9=0 add 9 to both sides and get x=9
x={ 4, 9}
Answer:
The correct answer is "50%".
Step-by-step explanation:
The given values are:
Gravel,
= 
Water,
= 
Cement,
= 1
Sand,
= 2
Now,
The total mixture will be:
= 
By substituting the values, we get
= 
= 
= 
hence,
The percentage of sand will be:
= 
= 
= 
%
Answer:
Step-by-step explanation:
= 19 R 15
= 19 15/17
338 divided by 17 equals
19 with a remainder of 15
Solution:
0 1 9
1 7 {3 3 8
− {0
3 3
− 1 7
1 6 8
− 1 5 3
1 5
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