<span>f(x) = x² + 4x
so
</span><span>f(-2) = (-2)² + 4(-2)
f(-2) = 4 - 8
f(-2) = -4
answer
-4</span>
Answer 3.14
Step-by-step explanation:
Area= pi*r^2
Circumference=2*pi*r
Area=C^2/4pi= 6.28^2/4*pi which ='s 3.13841
Length of a tennis racket: 2 ft 4 in. 10. height of a table tennis net: 6 in.
1:6
length of a table tennis paddle: 10 in. height of a tennis net: 3 ft
<span>10:17
</span>
diameter of a table tennis ball: 40 mm 12. length of a tennis court: 26 yd
26 : 3
diameter of a tennis ball: 6.8 cm length of a table tennis table: 9 ft
274:9
volume = PI x r^2 x H
you know the volume and the radius ( 12/2 = 6)
480.66 =3.14 x 6^2 x H
480.66 = 113.04 x h
h = 480.66/113.04 = 4.252
round off as needed.
15+8x=2x+7-5x
Subtract 8x from both sides.
15=2x+7-5x-8x
Combine like terms.
15=-11x+7
Subtract 7 from both sides.
8=-11x
Divide -11 from both sides.
.73=x
Your answer is .72
