Answer:
C. 10 s.
Step-by-step explanation:
When the hammer reaches the ground the height is 0 m, so:
-t - 2t + 30 = 0
-3t = -30
t = -30/-3
= 10 seconds.
So ratios
9:5=x:10
they should be equivilent
fractionify
9/5=x/10
mutily both sides by 10
90/5=x
18=x
blank=x
We know that
The <span>abscissa is the x coordinate and the ordinate is the y coordinate
</span>so
for x=1.2
<span>8x–5y=14------> 8*1.2-5y=14-----> 5y=9.6-14-----> 5y=-4.4----> y=-0.88
the answer is
the ordinate is -0.88
see the attached figure</span>