Answer:
Step-by-step explanation:
<em>(1).</em>
x + y = 9 and y = - 7x <em>( Neither )</em> ; lines intersect.
<em>(2).</em> y = 3x - 3; 12x - 4y = 12 <em>( Neither ) </em>; Lines are overlapped or both equation are of the same line.
<em>(3).</em> 7y = 2x + 1; 14x + 4y = 12 <em>( Perpendicular )</em> ;
=
and
= -
, slopes are opposite reciprocals.
<em>(4).</em> x - 4y = 18; y = x + 4 <em>( Neither )</em> ; lines intersect.
<em>(5).</em> 3x - 4y = - 1; 3y = - 4x + 5 <em>( Perpendicular )</em> ;
=
and
= -
, slopes are opposite reciprocals.
V...volume
B...Base
h...height
V=1/3 × B × h
V=1/3 ×r^2×pi × h
V=1/3 ×12^2×pi × 8
V= 1/3 ×144×pi ×8
V=1/3 × 1152pi
V=384pi cm^3
Answer:
51.23
Step-by-step explanation:
Answer:
C.b< 13
Step-by-step explanation:
3b-7<32
Add 7 to each side
3b-7+7<32+7
3b < 39
Divide each side by 3
3b< 39/3
b < 13