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Sonbull [250]
3 years ago
6

the expenses of a tea party are partly constant and partly vary directly with the number of guest.when there are 60 guest,the ex

penses are $2100.when there are 150 guest , the expenses are $4800.find the expenses when there are 200 guest​
Mathematics
1 answer:
VARVARA [1.3K]3 years ago
7 0

Answer:

$6300

Step-by-step explanation:

Using the equation of y=mx+c where c is constant, m is gradient then the two situations can be written as

2100=60x+c Equation 1

4800=150x+c Equation 2

Subtracting the terms of equation 1 from 2

(150-60)x=$4800-$2100

90x=$2700

x=$30

Substituting the value x into equation 1

60($30)+c=$2100

c=$2100-$1800=$300

c=$300

For 200 guests

y=200($30)+$300

y=$6000+$300=$6300

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