Hi, again, Can you help me understand this?

1 Identify one way to rewrite the expression using the distributive property. 8 * 19=
2 Identify one way to rewrite the expression using the distributive property. 2(9+3)
3 Simplify using the Distributive property 7*48
4 Simplify using the Distributive property 9*81
Please help me understand this, thank you!!

B

D
A
C

1. (8 x 20) - (8 x 1)

2. (2 x 9) + (2 x 3)
3. (7 x 50) - (7 x 2) = 350 - 14 = 336
4.(9 x 80) + (9 x 1) = 729

Now idk if these are exactly in order, but I got 100%.

I am a Retired Electronics Design/Reliability Engineer. I taught electronics at Lawrence Tech for 4 years. I am the inventor of the Tire Pressure Monitor which is used in all road vehicles manufactured after Fall of 2007.

I have a total of 3 patents.

Well, I don't have one, I just need help understanding this.

8*19 = 8 * (20 - 1) = 8*20 - 8*1

= 160 - 8
= 152
or if you want to get fancy
8 * 19 = (10-2)(20-1) = 200 - 10 - 40 + 2
= 200 - 50 + 2
= 152
:)

9*81

oh fun
(10-1)(80+1) = 800 +10 -80 - 1
= 730 - 1 = 729

thanks unknown 100%

thanks Graice

1. 8 x 19

Answer: (8 x 20) - ( 8 x 1)

2. 2(9 + 3)
Answer: (2 x 9) + (2 x 3)

3. 7 x 48
Answer: (7 x 50) - (7 x 2) = 350 - 14 = 336

4. 9 x 81
Answer: (9 x 80) + (9 x 1) = 729

I took the assessment and got 100%, these are the right answers.
Hope this helps with your grades guys.

I thank you, Star, for thanking your time for this, but that really doesn't help, But however Who Know( my teachers) I can use that info.