Answer:
Explanation:
To simplify a polynomial, we have to do two things: 1) combine like terms, and 2) rearrange the terms so that they're written in descending order of exponent.
First, we combine like terms, which requires us to identify the terms that can be added or subtracted from each other. Like terms always have the same variable (with the same exponent) attached to them. For example, you can add 1 "x-squared" to 2 "x-squareds" and get 3 "x-squareds", but 1 "x-squared" plus an "x" can't be combined because they're not like terms.
Let's identify some like terms below.
f(x)=−4x+3x2−7+9x−12x2−5x4
Here you can see that -4x and 9x are like terms. When we combine (add) -4x and 9x, we get 5x. So let's write 5x instead:
f(x)=5x+3x2−7−12x2−5x4
Let's do the same thing with the x-squared terms:
f(x)=5x+3x2−7−12x2−5x4
f(x)=5x−9x2−7−5x4
Now there are no like terms left. Our last step is to organize the terms so that x is written in descending power:
f(x)=−5x4−9x2+5x−7
Step-by-step explanation:
I have attached the graph. I did this using desmos.com. Try it out sometime. I hope that helps.
Answer:
£320
Step-by-step explanation:
Using proportion,
If 110% = £352
100% = ?
= 
= £320
Tax sucks, trust me. Since we use tax often in our lives, it's quite easy nowadays.
Switch the 7% tax to a number that can be used in a calculation.
Always divide the percent (7%) by 100%.
7% divided by 100% = 0.07
Now, you need to find out the total cost.
Always multiply 0.07 by 1500.
0.07 × 1500 = 105.
Now that we know that you have to pay an extra $105 tax, we can add it with the original price.
$1500 + 105 = 1605.
Your total price for the computer will be: $1605.
