PLEASE HELP ME ANSWER & ILL MARK YOU BRAINLIEST THANKS SHOW WORK

Expan and simplify the following expression:<br> 3(2a + 3)(2a - 1) - 4 (a^2 - 7)

Mekhanik [1.2K]

= 3(4a^2 + 4a - 3) - 4a^2 + 28
= 12a^2 + 12a - 9 - 4a^2 + 28
= 8a^2 + 12a + 19
= 4a(2a + 3) + 19

3 0

3 years ago

Does the expression d-12 have a greater value when d=42 or when d=46? Explain, without computing . Please help

Ann [662]

In the expression d-12, you understand that you are subtracting the value of 12 from any value of d
So if you have a greater value of d and you subtracted 12, you would be left with a greater value.
From the number line and your theory of numbers you know 46>42, therefore subtracting 12 from 46 will give a greater value.

3 0

3 years ago

How doo you know if its a.m or p.m but im like in first grade dont laugh

Luba_88 [7]

Answer:this is the answer

Step-by-step explanation:

Two 12-Hour Periods The 12-hour system divides the 24 hours of a day into two periods lasting 12 hours each. The first 12-hour period is designated as am. It runs from midnight to noon. The second period, marked pm, covers the 12 hours from noon to midnight.

4 0

2 years ago

For each of the prime numbers less than 30, Wallace

jek_recluse [69]

Answer: Ok, so this question is confusing to me as well, and I have this same question on school. So when I get the answer, I will try to explain it to you the best I can. :) God Bless. Stay :D

Step-by-step explanation:

6 0

3 years ago

Please help my assignment is due at 12:00!!

Brums [2.3K]

Answer: -13, -12.9

Step-by-step explanation:

pull out that HANDY DANDY calculator dog because we are about to go on a MATH ADVENTURE oh yea.

ok first make sure it is a reasonably good calculator but you can even use a calculator on your chromebook, maybe an online one? we need one that gives us PARENTHESES.

ok now you are going to want to input into this calculator, $(335 / 2)$ in other words 335 divided by 2. what do we get? we get

$167.5$

ok cool WE ARE MAKING PROGRESS HERE!!!

now i want you to look for the square root button, it looks like a radical like this

$\sqrt[2]{}$ or MAYBE IT DOESNT EVEN HAVE THE 2 and it is just: $\sqrt[]{}$

and press it, it should give you the square root but we want to find $\sqrt{167.5}$

and we get.....

$12.942...$

MY GOD THAT IS A SUPER LONG NUMBER! but its ok we only need 3 digits after the decimal. now notice that there is a negative sign behind that radical. thats radical, dude, ok now we have $-12.942...$

if we round to the nearest INTEGER then we need to round to the nearest WHOLE NUMBER which is

$-13$

and the nearest TENTH is one number after the decimal place so it would be...

$-12.9$

SURFS UP DUDE

P.S. i mention the parentheses because you can even do $\sqrt{(335/2)}$ (press square root button then opening parentheses then 335 / 2 then close parentheses and hit equal sign or ENTER) but dont forget that EPIC NEGATIVE SIGN!!!!!!!

4 0

2 years ago