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Novay_Z [31]
3 years ago
13

Ella and 3 friends are going ice skating. They hire 4 pairs of ice skates for 3 hours. The formula below is for working out the

cost of hiring the stakes including a deposit.
C=s(3h+5)

C
= total cost
s
= number of pairs of ice skates
h
= number of hours

How much will it cost to hire 4 pairs of ice skates?
Mathematics
1 answer:
anygoal [31]3 years ago
6 0

s = 4

h = 3

C = ?

C = s(3h + 5)

C = 4(3·3 + 5)

C = 4(9 + 5)

C = 4(14)

C = ?

ANSWER: It costs 56 dollars

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The explicit rule for the arithmetic sequence shown in the graph is a↓n=9.5+2(n-1)
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Answer:

True.

Step-by-step explanation:

The explicit form for an arithmetic sequence is:

a_n=a_1+d(n-1)

where a_1 is the first term and d is the common difference.

The common difference here is 2 because the y's are going up by 2 while the x's are going up by 1.

Yes, the common difference is the slope.

So we have d=2.

The first term is 9.5 because that is what happens when x=1.

x is n.

y is a_n.

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You can also verify by plugging in numbers for n and see if you get the outputs mentioned in the pairs given:

Let n=1:

a_1=9.5+2(1-1)

a_1=9.5+2(0)

a_1=9.5+0

a_1=9.5

Let n=2:

a_2=9.5+2(2-1)

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a_3=9.5+4

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Let n=4:

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a_4=9.5+6

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Let n=5:

a_5=9.5+2(5-1)

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Let n=6:

a_6=9.5+2(6-1)

a_6=9.5+2(5)

a_6=9.5+10

a_6=19.5

We have confirmed that we get all 6 of the mentioned points using the equation they gave.

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