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Stella [2.4K]
3 years ago
13

The function c(x) = 3x − 4 determines how many cupcakes need to be purchased for a birthday party, where x is the number of kids

at the party. The party planner uses d(c(x)) to find the amount of money to bring for the cupcake purchase. The function d(x) = 2x + 5. Solve for how much money to bring when there are 7 kids at the party.
Mathematics
2 answers:
dezoksy [38]3 years ago
6 0
The answer of d(c(x))=39. hope it will help you
Karolina [17]3 years ago
5 0

Answer: $39

Step-by-step explanation:

Given: The function c(x)=3x-4 determines how many cupcakes need to be purchased for a birthday party, where x is the number of kids at the party. The party planner uses d(c(x)) to find the amount of money to bring for the cupcake purchase. The function d(x) = 2x + 5

Now, d(c(x))=2(3x-4)+5=6x-8+5=6x-3

To find the amount of money to bring when there are 7 kids at the party, put x in d(c(x)), we get

d(c(7))=6(7)-3=42-3=39

Hence, the amount of money to bring when there are 7 kids at the party = $39

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iren2701 [21]

Offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

<h3>What is a fraction?</h3>

Fraction number consists of two parts, one is the top of the fraction number which is called the numerator and the second is the bottom of the fraction number which is called the denominator.

We have:
2 bags for £35

2 bags means 50 kg (2×25)

Each kg cost = 35/50 = £0.7 per kg

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3 bags means 150 kg

Each kg cost = 92.50/150 = £0.61 per kg

As we can see, offer B has a low cost per kg

Thus, offer B is the best value for money because each kg cost is £0.61 and in offer 'A' each kg cost is £0.7.

Learn more about the fraction here:

brainly.com/question/1301963

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