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Nataliya [291]
3 years ago
6

(20x2 – 12x) + (25x– 15) 4x(5x – 3) + 5(5x – 3)

Mathematics
1 answer:
Elza [17]3 years ago
8 0

Answer:

400x^4+260x^3−840x^2+349x−15

Step-by-step explanation:

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Sandra wants to give a party for 60 people. She has a punch recipe that makes 2 gallons of punch and serves 15 people. How many
zmey [24]

Answer:

8 gallons

Step-by-step explanation:

#1: Set up a ratio from the recipe: gallons of punch to the number of people.

2 gallons 15 people

#2: Set up a ratio of gallons to the people coming to the party.

(Place the gallons on top) x gallons 60 people

#3: Set up a proportion 2 gallons       x gallons

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* Like units should be across from each other

4) Solve using the "lonely mate" formula

2 gallons           x gallons

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120/15 = 8

This means she should make 8 gallons.

6 0
3 years ago
last month, a bookstore ran the following at and sold 85 calculators, generating $4,083 in sales. How many of each type of calcu
Scilla [17]

Answer:

31 scientific calculators

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Step-by-step explanation:

X = number of $15 calculators

Y = number of $67 calculators

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substitute for X

15(85-Y)+67Y = 4083

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52Y = 2808

Y = 54

X = 31

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4 years ago
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