Consider posting each question separately, please.
Given <span>-2.8k-4.31=-15.79 :
1) Isolate the "k" term on the left by adding 4.31 to both sides of this equation.
2) Simplify the right side.
3) Divide both sides by -2.8 and you'll have the answer: k = ?</span>
Answer:
See below
Step-by-step explanation:
Do you mean -12(x+5)=-10?
Divide both sides by -12 -> x+5=10/12
Subtract 5 on both sides -> x=10/12-5 -> x=-4 1/6
So x=-4 1/6
Let me know if this wasn't the right equation
The first one.
Hope this helps :)
If b is Billy's age *now*, part A would look something like this:
b + 8
Usually, it looks a little more like x = b + 8, just because we like setting the equation to an unknown variable (usually x).
b + 8 = 21
To simplify the above equation, subtract 8 from both sides:
b = 21 - 8
OR
b = 13
We just found the answer to part C above.
I'm not going to work out part D for you (you got this), but use the subtraction sign to your benefit and replace it with a word like "ago", if you're choosing age as your word problem. You could also do the traditional candy word problem where you once had 10 jellybeans and now you have 6.... Up to you. "A" will be your "now" in that case. Have fun!
Answer:
7a - 21 + 28b
Step-by-step explanation:
using the distributive property we can multiply 7 to the numbers in the paretheses. doing this we get:
7a - 21 + 28b