Answer:
68+97i
Step-by-step explanation:
work shown and pictured
F(x)=2x+8
F(-1.8)=2(-1.8)+8
f(-1.8)=-3.6+8
f(-1.8)=4.4
Answer is x² + 2x + 5
<u>Step-by-step explanation:</u>
Step 1:
Add the two polynomials
⇒ (2x + 7) + (x² - 2) = 2x + 7 + x² - 2 = x² + 2x + 5
Answer:

Step-by-step explanation:
Let the number be x;
The product of 4 and the number will be;

The the square of the number is given as;

Taking the difference of both expressions above;

Factor out the common term:

Hence the difference between the product of 4 and a number and the square of the number is 
Answer:
28 pizzas eaten
Step-by-step explanation:
1) estimate each number, i will take 3 1/4 as 3
5 3/4 as 6
and
2 3/4 as 3
2) combine the total number of pizzas left over:
3+6+3=12
subtract the number of pizzas left over from the total ordered:
40-12=28