Answer:2/7
Step-by-step explanation:
Okay so how you solve an equation is listed here:
hmm lets say 4x + 1 ÷2= 6
4x + 1 ~÷2~= 6
~x2~ x2
------------------------
4x~+1~ 12
~ -1~ -1
-------------------------
4x. 11
÷4. ÷4
-----------------------
x. = 2.75
Answer:
The original nimber is 67.
Step-by-step explanation:
Let the two digits be x and y.
According to the question.
The sum of two digits of a two digit number is
x + y = 13
or, x = 13 - y
And, a two digit number can be written as
x × 10 + y
when the digits are reversed, the number can be written as
y × 10 + x
the original number increases by 9. i.e.
y x 10 + x = x × 10 + y + 9
Replacing value of x by 13 - y,
y × 10 + 13 - y = 10(13 - y) + y + 9
10y + 13 - y = 130 - 10y + y + 9
9y + 13 = 139 - 9y
18y = 139 - 13
18y = 126
y = 126/18
y = 7
So, x = 13 - y
= 13 - 7
= 6
The original number is x × 10 + y = 6 x 10 + 7 = 67.
This time it's cosine.
Cosine is the adjacent/hypotenuse. In this case, the adjacent is 15 and hypotenuse is 21.
15/21, or like 5/7.
Now put that into a fancy calculator with the
thing or something like that and then you have the answer, or around 44 degrees.
