The second answer is right
Answer:
43
Step-by-step explanation:
v+47 is equal to 90 degrees, because it's a right angle
v+47=90
to get 90 in this equation, v must equal 43.
that means v=43
What the spinner or the tile?
Answer:
1/36 ≈ 0.028
Step-by-step explanation:
In order to get a total of 2 if you roll 2 dice, you have to roll two ones. (You can't roll a 0 and 2 because an average die does not have a zero on it)
You have a 1/6 chance to roll a 1 on the first die; and you have a 1/6 chance to roll a one on the second die.
To find the probability of this happening together you have to multiply them together.
1/6 * 1/6 = 1/36 = 0.0277778 ≈ 0.028
There are several entries (examples) of "special products and factors."
x^2-y^2 = (x-y)(x+y)
x^3+y^3 = (x+y)(x^2-xy + y^2)
x^3 - y^3 = (x - y)(x^2 + xy + y^2)
The given expression, 27x^3 - 1, matches the format of the third example given above.
Note that 1 can be rewritten as 1^3 without changing its value.
Thus, The given expression, 27x^3 - 1, is the same as 27x^3 - 1^3, which in turn can be rewritten in the form x^3 - y^3:
27x^3 - 1^3 = (3x)^3 - 1^3. And so, the factors are (3x - 1)(9x^2 + 3x + 1)
It'd definitely be worth learning and memorizing the special products and factors listed above, as well as others.