Answer: x=2+√2 or x=2−√2
Step-by-step explanation:
The answer is 48 because 1.6 times 30 is 48
Answer:
(a + 2)
Step-by-step explanation:
To factor the quadratic, consider the factors of the constant term which sum to give the coefficient of the a term, that is
factors which multiply to give + 10 and sum to + 7
the required factors are + 5 and + 2, hence
a² + 7a + 10 = (a + 5)(a + 2)
<span>The answer is that
4 kg of pure tin and 28 kg of 4% tin alloy were used to produce the 16% alloy.
</span>
Let,
x
= kg of pure 100% tin
and y = kg of 4% tin
x
+ y = 32
x
= 32 -y
1.00 x + 0.04 y = 0.16 x 32
By
solving the above system of equations we find:
Now
put the value of x in the above equation;
1
x (32 - y) + 0.04 y = 5.12
32
– y + 0.04y = 5.12
y – 0.04y = 32 – 5.12
0.96y
= 26.88
y = 26.88/0.96
y = 28 kg of 4% tin
Now
put the value of y in x = 32 – y
x = 32 – 28
<span>x = 4 kg of pure 100% tin</span>