surface area (S) of a right rectangular solid is:
S = 2*L*W + 2*L*H + 2*W*H (equation 1)
where:
L = length
W = width
H = height
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you have:
L = 7
W = a
H = 4
-----
formula becomes:
S = 2*7*a + 2*7*4 + 2*a*4
simplify:
S = 14*a + 56 + 8*a
combine like terms:
S = 22*a + 56
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answer is:
S = 22*a + 56 (equation 2)
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to prove, substitute any value for a in equation 2:
let a = 15
S = 22*a + 56 (equation 2)
S = 22*15 + 56
S = 330 + 56
S = 386
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since a = 15, then W = 15 because W = a
go back to equation 1 and substitute 15 for W:
S = 2*L*W + 2*L*H + 2*W*H (equation 1)
where:
L = length
W = width
H = height
-----
you have:
L = 7
W = 15
H = 4
-----
equation 1 becomes:
S = 2*7*15 + 2*7*4 + 2*15*4
perform indicated operations:
S = 210 + 56 + 120
S = 386
-----
surface area is the same using both equations so:
equations are good.
formula for surface area of right rectangle in terms of a is:
S = 22*a + 56
-----
Answer:
The time required to finish the work by both candy and Tim working together = 36.83 minute
Step-by-step explanation:
Time taken by the candy to finish the work 
= 85 min
Time taken by the Tim to finish the work 
= 65 min
Thus the time taken by both to finish the work = 
Put the values of and we get ,
= 
= 
= 36.83 minute
Thus the time required to finish the work by both candy and Tim working together = 36.83 minute
Answer:
5/8
Step-by-step explanation:
Answer:
Olá, tudo bem?
Step-by-step explanation:
Meu nome é Ana Kesia, e o seu??
Foi mal, Nn consegui responder sua pergunta!
Obrigada pelos pontos mesmo assim!
Qualquer Dúvidas, estou aqui para te ajudar!
Tchau, tenha uma Ótima tarde.♥♥
Answer:
The second adjective, “smarter,” refers back comparatively to the first adjective, which is also the word “smarter.” To have any meaning, you'd have to know what was meant by “smarter” the first time it was used in the sentence. However, there's no clue about that either
Step-by-step explanation:
