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2 years ago

Using Order of Operations (PEMDAS), solve the following two expressions. Show all steps.

Mathematics

2 answers:

aksik [14]2 years ago

8 0

Answer:

Multiple: 3 * 5 = 15

Add: 7 + the result of step No. 1 = 7 + 15 = 22

Divide: 4 / 2 = 2

Subtract: the result of step No. 2 - the result of step No. 3 = 22 - 2 = 20

Add: the result of step No. 4 + 3 = 20 + 3 = 23

Add: 7 + 3 = 10

Multiple: the result of step No. 1 * 5 = 10 * 5 = 50

Divide: 4 / 2 = 2

Subtract: the result of step No. 2 - the result of step No. 3 = 50 - 2 = 48

Add: the result of step No. 4 + 3 = 48 + 3 = 51

mart [117]2 years ago

4 0

9514 1404 393

Answer:

a) 23

b) 26

Step-by-step explanation:

a) Perform the multiplication and division first, then the addition.

7 + 3·5 -4÷2 +3

= 7 +15 -2 +3

= 23

b) Evaluate parentheses first, then the rest of it. The multiplication and division are done before the addition at the same level.

((7 +3)·5 -4)÷2 +3

= (10·5 -4)÷2 +3

= (50 -4)÷2 +3

= 46÷2 +3

= 23 +3

= 26

_____

Additional comment

An appropriate calculator can evaluate these for you. The Go.ogle calculator reliably follows the order of operations. You can use an asterisk (*) for multiplication with that calculator.

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Natali5045456 [20]

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In supply (and demand) problems, y is the number of items the supplier will produce (or the public will buy) if the price of the

SSSSS [86.1K]

Answer:

A) (17 ; 550)

B) $17/item

C) 550

Step-by-step explanation:

First we must calculate the intersection point of the two lines. Since in that point y has the same value in both equations, we can obtain x by equalling the two equations and then using that value for obtaining y:

$5x+465=-6x+652\\5x+6x=652-465\\11x=187\\x=\frac{187}{11}\\x=17$

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Supply and demand are in equilibrium when the amount of items on supply are the same as the ones on demand. That is the point were the two lines intersect, which means the selling price is the x coordinate and the amount of items is the y coordinate, so that is a selling price of $17/item with a number of items of 550.

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Answer:

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Step-by-step explanation:

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