11 years, it will take.
500 - 30 = 470 l 150 + 2 = 152(1)
470 - 30 = 440 l 152 + 2 = 154 (2)
440 - 30 = 410 l 154 + 2 = 156 (3)
410 - 30 = 380 l 156 + 2 = 158 (4)
380 - 30 = 350 l 158 + 2 = 160 (5)
350 - 30 = 320 l 160 + 2 = 162 (6)
320 - 30 = 290 l 162 + 2 = 164 (7)
290 - 30 = 260 l 164 + 2 = 166 (8)
260 - 30 = 230 l 166 + 2 = 168 (9)
230 - 30 = 200 l 168 + 2 = 170(10)
200 - 30 = 170 l (11)
Answer:
39°
sum of triangle's interior angles: 180°
180°-90°-51°=39°
Let
x-------> the number of fiction books
y-------> the number of nonfiction books.
we know that
-----> equation
-----> equation
Add equation and equation
<u>find the value of y</u>
therefore
<u>the answer is</u>
Part a) the number of fiction books is
Part b) the number of nonfiction books is