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olasank [31]
3 years ago
15

Simplify the expression below.

Mathematics
2 answers:
mario62 [17]3 years ago
5 0

3 · -8 + 5 - 4 ÷ 2

Use PEMDAS

P=parenthesis

E=exponents

M= multiplication

A= addition

S=subtraction

-24+5- 4÷ 2

-19-2

=-21

Answer is B-21

Margaret [11]3 years ago
4 0

Answer:

B. -21

Step-by-step explanation:

You have to follow PEMDAS

3*-8=-24

So, -24+5-4÷2

-4÷2=-2

So, -24+5-2

Then add and subtract from left to right

-24+5=-19

-19-2=-21

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The greater of is 7 more than the lesser. three times the greater number is 5 more than r4 times the lesser number. Find the num
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<h2>Steps:</h2>

(Let x = greater number and y = lesser number)

So this question is asking us for a system of equations. Using the info they provide, we can form these two equations:

x=y+7\ \textsf{("The greater of the numbers is 7 more than the lesser.")}\\3x=4y+5\ \textsf{("Three times the greater number is 5 more than 4 times the lesser number.")}

So for this, we will be using the substitution method. Since we know that x = y + 7, substitute x with (y + 7) in the second equation as such:

3(y+7)=4y+5

From here we can solve for y. Firstly, distribute 3 so that it multiplies with y and 7:

3y+21=4y+5

Next, subtract 3y on both sides of the equation:

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Lastly, subtract 5 on both sides of the equation:

16=y

Now that we know the value of y, we can substitute it into either equation to solve for x:

x=16+7\\x=23\\\\3x=4(16)+5\\3x=64+5\\3x=69\\x=23

<h2>Answer:</h2>

<u>In short, 16 is the lesser number and 23 is the greater number.</u>

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