Jack has 212 marbles.
Step-by-step explanation:
Jack and Watson have = 365 marbles
Jack and Asher have = 263 marbles
Let,
x be the marbles Jack have
y be the marbles Watson have
z be the marbles Asher have
According to given statement;
x+y=365 Eqn 1
x+z=263 Eqn 2
Watson has three times as many marbles is Asher.
y=3z Eqn 3
Putting y=3z in Eqn 1;
x+3z=365 Eqn 4
Subtracting Eqn 2 from Eqn 4
Dividing both sides by 2
Putting z=51 in Eqn 2
Jack has 212 marbles.
Keywords: linear equations, subtraction
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Tracy and Dave together complete the task in hours
Given Tracy alone take 8 hours to complete work and dave alone take 12 hours to complete the work.
Let's say together they worked in x hours
⇒in 1 hour they worked th part of the work
Tracy herself worked 8 hours to complete the whole task
⇒ in 1 hour Tracy completes th part of the task
Dave himself worked 8 hours to complete the whole task
⇒ in 1 hour Dave completes th part of the task
By proportions
⇒+= { using operation addition}
⇒ x=
Therefore,Tracy and Dave together complete the task in hours
Learn more about hour here:
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Answer:
I think it is A
Step-by-step explanation:
the reason i am saying A is that you don't really know how many guests are coming it could be 10 or 15 or even more.
El a e (C)no su................