Answer:
percent of iron in alloy= 100-42 = 58%
weight of the iron = 55×58÷100= 31.9
weight of iron= 31.9 kg
weight of copper= 55-31.9=23.1
weight of copper = 23.1
Step-by-step explanation:
[ I'm not sure but I think this is right ]
Answer:
7:12
Step-by-step explanation:
21 and 36 are both multiples of 3.
3 times 7 is 21, and 3 times 12 is 36.
Now, this ratio becomes: 3 x 7 : 3 x 12
Dividing by 3 on both sides,, we have: 7:12. The ratio 7:12 can't be simplified further, so that's the answer.
Let me know if this helps!
Answer: H = 20
Step-by-step explanation:
To find the hypotenuse , we will use Pythagoras theorem, which states that
The square of the hypotenuse = the square of the adjacent + the square of the opposite.
Since , we are dealing with isosceles right triangle , this means that :
both the adjacent and the opposite are equal, using the formula to find the hypotenuse , let H represent the hypotenuse , then
= +
= 400 + 400
= 800
Take the square root of both sides
H =
can be written as x
Therefore :
H = x
H = 20x
H = 20
Answer:
The sum of the interior angles of any triangle = 180°
Step-by-step explanation:
(15x + 1) + (6x + 5) + (4x – 1) = 180°
25x + 5 = 180
25x = 175
x = 7
Evaluate x into each: m<A = 106° , m<B = 47° , m<C= 27°
106 + 47 + 27 = 180