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Lerok [7]
3 years ago
13

-3mn+4m-3 when m=2 and n=-4

Mathematics
2 answers:
Sladkaya [172]3 years ago
7 0

Answer:

29

Step-by-step explanation:

m = 2 and n = -4

-3mn + 4m - 3

-3(2)(-4) + 4(2) - 3

-6(-4) + 8 - 3

24 + 8 - 3

32 - 3 = 29

kirill115 [55]3 years ago
4 0
<h2><u>Answer:</u></h2>

 \huge\boxed{29}

<h2><u>Solution Steps:</u></h2>

______________________________

<h3>1.) <u>Fill in the variables with the information given:</u></h3>
  • -3(2)(-4)+4(2)-3

 - M = 2

 - N = -4

<h3 /><h3>2.) <u>Multiply:</u></h3>
  • -3 × 2=-6
  • 4 × 2=8

 - The reason we multiply first is due to Order of Operations or PEMDAS: Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction.

 - When we see y(x) this just means whatever number or variable is before the parenthesis, you multiply it by that.

<u>Equation at the end of Step 2:</u>

  • -6(-4)+8-3

<h3>3.) <u>Multiply again:</u></h3>
  • -6 × -4=-24

 - We do this once more because we had one last parenthesis.

<u>Equation at the end of step 3:</u>

  • 24+8-3

<h3>4.) <u>Add:</u></h3>
  • 24+8=32

<u>Equation at the end of Step 4:</u>

  • 32-3

<h3>5.) <u>Subtract:</u> </h3>
  • 32-3=29

______________________________

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68% of johns school are boys. There are 180 more boys than girls. How many students are there in johns school
Ghella [55]

Answer:

500 students in the school

Step-by-step explanation:

100 - 68% = 32%

boys percentage 68%

girls percentage 32%

difference 68 - 32 = 36% = 180

36 ÷ 18 = 2 × 50 = 100

180 ÷ 18 = 10 × 50 = 500

4 0
3 years ago
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A different class has 285 students, and 51.2% of them are men. how many men are in the class?​
Zanzabum

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146

Step-by-step explanation:

Get a percent calculator, Then, you put 51.2% of 285 and you actually get 145.96 but the rounded of what you need is 146

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3 years ago
Simplify Completely<br> 6x^4 + 9x^2 + 12x over 3x
Aleksandr-060686 [28]
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3 years ago
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An adult ticket to the show costs $2 more than a student ticket. The total cost of 3 student tickets and 2 adult tickets is $39.
madreJ [45]

Answer:

An adults ticket costs $9

Step-by-step explanation:

Kids:

$7

Adults:

$9

So if you add 7+7+7= 21 (kids)

then do 9+9=18(adults)

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the table shows the number of yards a football player runs in each quater of a game find the mean number of yards the player run
zalisa [80]

We know the number of yards run per quarter:

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  • Quarter 2: 14 yards
  • Quarter 3: -18 yards
  • Quarter 4: -6 yards

\text{Mean number of yards run} = \frac{\text{Sum of yards run across quarters}}{\text{Total number of quarters}}

Sum of yards run across quarters = (-2) + 14 + (-18) + (-6) = -12

Total number of quarters = 4

⇒ \text{Mean number of yards run} = \frac{\text{Sum of yards run across quarters}}{\text{Total number of quarters}}

⇒ \text{Mean number of yards run} = \frac{-12}{4} = -3

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4 years ago
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