Answer:
200
Step-by-step explanation:
Answer:
Sure.
Step-by-step explanation:
So X is a variable meaning its a letter that represents a number. When there are a number and a variable (or a letter) like this 2x or 9y it means you are going to multiply the number by the variable. In this case it is 7 times x is equal to 21 so all we have to do is find what times 7 is equal to 21 and that number is 3. So if 7*x=21 is 7*3=21 then x=3. If you have any questions ill be more than open to answering them, hopefully this helped. Have a good day/night.
Answer:
A. 4x^2 - 9
Step-by-step explanation:
2x * 2x = <u>4x^2</u>
2x * -3 = <u>-6x</u>
3 * 2x = 6x
-3 * 3 = -9
-6x + 6x = 0, so we're left with 4x^2 - 9
Answer:
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Step-by-step explanation:
