Evaluate the expression 5x-2y when x=4, y=10

To solve this plug 4 in for x and 10 in for y like so...

5(4) - 2(10)

5 × 4 - 2 × 10

To solve this you must use the rules of PEMDAS (Parentheses, Exponent, Multiplication, Division, Addition, Subtraction)

We will skip the steps of parentheses and exponents since there are none in this expression

Now we will multiply. The only issue is that there are two sets of numbers to multiply. Which one will we multiply first? You will multiply first the set of numbers that come first when reading from left to right.

In this case you will first multiply 5 with 4

5 × 4 - 2 × 10

20 - 2 × 10

Next we will multiply -2 with 10

20 - 2 × 10

20 - 20

There is no division and addition in this expression so we will go on to subtraction:

20 - 20

= 0

Hope this helped!

~Just a girl in love with Shawn Mendes

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

step-by-step explanation:

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