Only (a) describes a one-to-one function. (b) fails because
; similarly, (c) fails because
.
160 grams of rice is four times larger than the given 40 g.
<span>So the number of Calories must be 4 times larger too. </span>
<span>48 x 4 = 192 Calories in 160 g of rice</span>
One of the reasons could be , because he was covering up the negative results and showing only the positive side of it .
The best way to multiply complicated problems mentally* is to break them into chunks.
Start with 20 times 8 to get 160, and then 8 times 5 to get 40. Add these together to get 200. 200 times 3 is 600, and 20 times 200 is 4000. Add these together to get your final answer, 4600.
In other words 8 x 20 + 8 x 5 = 200 200 x 3 + 200 x 20 = 4600
*I assumed you meant mentally, because otherwise you'd just multiply longhand, multiplying two of the three numbers and then multiplying their product with the third.
Answer:
5d+4
Step-by-step explanation:
Hope it helps ;P