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Dahasolnce [82]
3 years ago
12

What is 7(y+3)-4(2n-3)

Mathematics
2 answers:
julia-pushkina [17]3 years ago
8 0

Answer and Step-by-step explanation:

\Huge \boxed{Answer: 7y+33-8n}

Step 1: Expand 7(y+3) :

=7y+21-4(2n-3)

Step 2: Expand -4(2n-3)

=7y+21-8n+12

Step 3: Simplify 7y+33-8n

=7y+33-8n

Anettt [7]3 years ago
6 0

Answer:

-n+33

Step-by-step explanation:

1. do distributive property

2.  7y+21-8n+12

3. combine like terms

4. 7n and 8n both are like terms so, 7n-8n= -1n or -n

5. 21 and 12 are like terms so, 21+12= 33

answer is:      -n + 33   or    -1n + 33

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Answer:

20

Step-by-step explanation:

pilot flew a 400-mile flight in 2.5 hours flying into the wind . Flying the same rate and with the same wind speed, the return trip took only 2hours with a tailwind

The speed can be defined as the ratio distance over time, but in this case the pilot is flying at the speed of the plane as well of speed of the wind. We can denote speed of plane as "s" and speed of the wind as "k"

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8 0
3 years ago
A shirt originally cost $39.39, but it is on sale for $27.57. What is the percentage decrease of the price of the shirt?
IgorLugansk [536]

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looking at this i know its a percent decrease

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the way that most people mess up is when they divide sometimes they might do 39.39 divided by 11.82 instead of 11.82÷39.39.

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