Answer:
80%
Step-by-step explanation:
16/20×100
0.8×100=80
For questions 1 and 2 , write each expression using a single exponent.

<span>For questions 3 and 4, simplify each expression.
</span>

<span>For questions 6-8, multiply the following polynomial.
</span>
By completing the square: x²-8x+19 = (x-4)²-16+19 = (x-4)²+3 so minimum point = (4,3)
By calculus: f'(x) = 2x-8. (minimum point occurs when f'(x)=0 therefore)
2x-8 = 0 means x=4 and the corresponding y value is 3.
The minimum value of this function (y) is 3 and this occurs when x = 4.
Answer:
No, he won't have enough money to make the purchase.
The sales tax is 2.9352
The total amount for the purchase is 51.8552
So, $50 is not enough to make the purchase.
Step-by-step explanation:
I used a calculator.
Answer:
The answer is (b) ⇒
Step-by-step explanation:
∵ 
∵ √x² = x ⇒ that means to cancel the square root divide
the power by 2
∴ 
∵ √4 = 2 ⇒ √2×2 = √2² = 2
∵ √c³ = 
∴ 
∴ 
∵ In the same base with multiplication we add the power,
in same base with division we subtract the power
∴ 
⇒ 
∴ The answer is (b) ⇒ 