Answer:
The only reason mathematics is admirably suited describing the physical world is that we invented it to do just that. It is a product of the human mind and we make mathematics up as we go along to suit our purposes. ... Mathematics is not discovered, it is invented.
Step-by-step explanation:
(-7x + 2)^1/3 = (4 + 3x)^1/3
take the cube of both side to eliminate the 1/3 power
so you get
-7x+2=4+3x
combine like terms
-10x=2
solve for x
x=-1/5
Answer:
Equation: 4x = 128


Step-by-step explanation:
(Linear pair angles)
- -> (x + 52)° + (3x)° = 180°
- -> 4x = 128 ( This is the required equation)
Let the height of the person with shoulder width of 18.5 be = x
As given, A person who is 64 inches tall has a shoulder width of 16 inches.
So, we have to find the height when the shoulder width is 18.5 inches.
We can relate these two by ;




Hence, the height of the person should be 74 inches.
5x + 2y = 7....multiply by -1
-2x + 2y = -14
----------------
-5x - 2y = -7 (result of multiplying by -1)
-2x + 2y = -14
---------------add
-7x = - 21
x = -21/-7
x = 3
5x + 2y = 7
5(3) + 2y = 7
15 + 2y = 7
2y = 7 - 15
2y = - 8
y = -8/2
y = -4
solution is (3,-4)