Answer:
3. 9.4cm2
4. Any flat surface of a 3-D object or cube.
Step-by-step explanation:
A face is well flat.
9-8.2-(-1.9) =
9-8.2+1.9
.8+1.9
2.7
-8-(-5.4)-1.8 =
-8+5.4-1.8
-2.6-1.8
-4.4
Alex has a higher score by 7.1.
Answer:
6
Step-by-step explanation:
After 10 hours he has graded 10*7 papers which is 70
76-70 = 6
Answer:
factoring trinomial
Step-by-step explanation:
x^2 - 6x - 27 = 0
(x - 9)(x + 3)
x = ( 9 , - 3)
Answer:
$521.91 after 9 years
Step-by-step explanation:
Initial amount $400
3%=0.03
After 1 year:
A1=400(1+0.03)=400×1.03
After 2 years
A2=A1(1+0.03)=400×1.03²
....
After 9 years
A9=400×1.03⁹
A9=$521.91