Answer:the number of BlackBerry that Arlene had initially was 276
Step-by-step explanation:
Let x represent the number of BlackBerry that Arlene had initially.
She gave 216 to her teachers. This means that she is left with x - 216
Then she dropped 12. This means that she would be left with x - 216 - 12 = x - 228
Later, she ate 18. This means that she would be left with x - 228 - 18 = x - 246
Finally, she gave half of what she had to her friend. This means that the amount that she gave to her friend is (x - 246)/2 and the amount that she has left would be
(x - 246)/2
Now, she has 15. This means that
(x - 246)/2 = 15
x - 246 = 2 × 15 = 30
x = 30 + 246 = 276
Answer:
30%
Step-by-step explanation:
For a 7*7=49 so sqrt(49)=7
6*6=36 so sqrt(36)=6
and since sqrt(x) is am increasing function then
6 < sqrt(42) <7
you do the same for b but with 4 values :
like 4*4*4= 64
and 3*3*3=27
Answer:
A: 30°
Step-by-step explanation:
Complementary means 90°. So 60+ x =90. 60+30=90.
