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BlackZzzverrR [31]
3 years ago
6

Do 3 questions for 12 points.

Mathematics
1 answer:
tresset_1 [31]3 years ago
6 0

Answer:

  3.  -2

  4.  12

  5.  -4

Step-by-step explanation:

For all problems, let n represent "a number." You will note that when we specify an operation to be done on the equation, it is done to <em>both sides of the equation</em>.

__

3. 5n +(-3) = -13

  5n = -10 . . . . . . add 3

  n = -2 . . . . . . . . divide by 5

The number is -2.

__

4. (n/2) -7 = -1

  n/2 = 6 . . . . . . . add 7

  n = 12 . . . . . . . . multiply by 2

The number is 12.

__

5. 2n -1 = -9

  2n = -8 . . . . . add 1

  n = -4 . . . . . . divide by 2

The number is -4.

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A machine can stamip 36 bottle caps in ten seconds. At this rate how many minutes will it take to stamp 24,408 bottle caps?
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There are 60 seconds in a minute. The machine stamps 36 caps in 10 seconds. 36X6=216 caps per minute.

24,408/216=113

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3 years ago
Your mom's new car gets 32 miles per gallon and gasoline costs $1.99 per gallon. You are going to see Uncle buck for Christmas,
Mashcka [7]

The gas cost will be $19.53 for this trip.

Step-by-step explanation:

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Keywords: unit rate, multiplication

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3 years ago
Danny earns a monthly allowance of twenty dollars and extra seventy five cents every time he is nice to his mom. Avery earns a m
Lerok [7]

Answer:

Danny: y-=.75x+20

Avery: y=1.25x+18

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To write a system of equations, it usually equals y=mx+b. Since Danny and Avery both earn the set monthly allowance of 20 and 18 dollars respectively, those numbers go on the variable b since it's a set amount and they start off with that amount of money if they weren't nice to their mom at all.

Since we are trying to find the overall amount of money, let y=total money a child earns every month and x=how many times the child is nice to their mother.

The extra .75 cents Danny earns go under the variable m because it is dependent on how many times he is nice to his mom. Along with Avery.

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3 years ago
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The pictures too blurred, can you write it out?
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3 years ago
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