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3 years ago

Pleaseeee help! It’s been due since yesterday!

Mathematics

2 answers:

vichka [17]3 years ago

6 0

Answer:

1 student

Step-by-step explanation:

We know that groups of 3 cannot equaly fit into 25. So we have to think about what number less than 25 can have three equally divided in it. The number is 24. Now we know that 8 groups of 3 people can greet the parents. One student cannot be on the team becuase there are 25 students and 24 of them are already in groups. 25-24=1.

<em>You could also use division and get 1 as the remainder: </em>25 ÷ 3 = 8 with 1 as a remainder

I hope I helped! Let me know if you need help :)

jeka943 years ago

6 0

Answer:

1 student cannot be on a team, and there will be 8 teams total.

Step-by-step explanation:

Well, all you have to do is divide.

25÷3=8 remainder 1

Hope this helps! LMK if you need an explanation.

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Rewriting we have:

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Dividing by 2 to both sides of the equation:

$v ^ 2 + 6v-6 = 0$

We apply the quadratic formula:

$x = \frac {-b \pm \sqrt {b ^ 2-4 (a) (c)}} {2a}$

We have to:

$a = 1\\b = 6\\c = -6$

Substituting:

$x = \frac {-6 \pm \sqrt {6 ^ 2-4 (1) (- 6)}} {2 (1)}\\x = \frac {-6 \pm \sqrt {36 + 24}} {2}\\x = \frac {-6 \pm \sqrt {60}} {2}\\x = \frac {-6 \pm \sqrt {4 * 15}} {2}\\x = \frac {-6 \pm2 \sqrt {15}} {2}$

Thus, we have two roots:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

ANswer:

$x_ {1} = - 3+ \sqrt {15}\\x_ {2} = - 3- \sqrt {15}$

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3 years ago

Solve the system of equations using the substitution method.

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