Answer:
40 kilometres
Step-by-step explanation:
3cm : 10 kilometres
x4 x4
12cm : 40 kilometres
10sinx-6=0
sinx=6/10=3/5, not negative three out of five.
yo use a calculator' sin3/5=sin0.6, if 0≤x≤2π, x≈37 or 127 (37+90=127, sine is positive in first and second quadrant)
For this case you can solve the problem by a simple rule of three:
72 ---> 100%
x ---> 30%
Clearing x we have:
x = (30/100) * (72) = 21.6 $
Then, we must subtract this value from the original price:
72-21.6 = 50.4 $
answer:
Gabriela pays $ 50.4 with the discount
Answer:
the answer is 12
Step-by-step explanation:
please if I'm wrong let me know aye
Answer:
Let's say that the whole book have 5a pages.
First day: a + 12
Second day: (4a)1/4+15= a + 15
Third day: (1/3)[ 4a - (a+15)] +18= a + 13
Forth day: 70
So we get this:
(a + 12) + (a + 15) + (a + 13) + 70 = 5a
a + 12 + a + 15 + a + 13 + 70 = 5a
3a + 110 = 5a
3a - 5a = -110
-2a = -110
a = 55
5a = 5(55) = 275
So the total pages are in the book is:
275 pages