To save exactly enough Jerry would have to save $92.80 a week for 25 weeks.
Answer:
(X-7) (x+10)
Step-by-step explanation:
X*X = X^2
X^2+x = 3x
-7*10 = -70
X^2+3x-70
Answer:
y=2
Step-by-step explanation:
Answer:
50 km
Step-by-step explanation:
Given
-- Scale ratio
Required
Actual representation of 10cm
Let the actual measurement be x.
So, we have:
Equate both value s of r
Express as fraction
Multiply by 10cm
Answer:
31.869 kg.
Step-by-Step Explanation:
Inner radius,r=12/2=6cm
thickness=1cm
so,outer radius,R=6+1=7cm
height,h=1m=100cm
volume=pi×(R^2-r^2)×h
=22/7×(7^2-6^2)×100
=22/7×(49-36)×100
=22/7×13×100
286/7×100
=28600/7
since,density=7.7gm/cm^3
also,weight=volume×density
weight=28600/7×7.7gm
=31460gm
or,31.46 kg