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2 years ago

15

Marco has $38.43 dollars in his checking account. His checking account is linked to his amazon music account so he can buy music

. The songs he purchases cost $1.29.

1 answer:

Mumz [18]2 years ago

5 0

Step-by-step explanation:

38.43 - 1.29x

Variable x represents the number of songs purchased

Not sure why this question didn't save the answer I just wrote (I'm new to the app)

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At a party, everyone shook hands with everybody else. There were 66 handshakes. How many people were at the party?

Gnoma [55]

There would be 12 people at the party!

In general, with n+1 people, the number of handshakes is the sum of the first n consecutive numbers: 1+2+3+ ... + n.

Since this sum is n(n+1)/2, we need to solve the equation n(n+1)/2 = 66.

This is the quadratic equation n2+ n -132 = 0. Solving for n, we obtain 11 as the answer and deduce that there were 12 people at the party.

Since 66 is a relatively small number, you can also solve this problem with a hand calculator. Add 1 + 2 = + 3 = +... etc. until the total is 66. The last number that you entered (11) is n.

Hope this helps!

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irinina [24]

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Ten is not equal to six divided by three

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Find the slope (-10,8) (5,-3)

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Answer:

m= 9/5 n - 3

Step-by-step explanation:

Let's solve for m.

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Step 1: Add -9n to both sides.

−5m+9n+−9n=15+−9n

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Step 2: Divide both sides by -5.

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