Answer:
E. -8, -29
Step-by-step explanation:
a-b=21
5a -2b =18
Take the first equation and solve for a by adding b to each side
a-b=21
a-b+b=21+b
a = 21+b
Now substitute a=21+b into the second equation
5a -2b =18
5(21+b) -2b =18
Distribute the 5
105 +5b-2b =18
Combine like terms
105 +3b =18
Subtract 105 from each side
105-105 +3b = 18-105
3b = -87
Divide each side by 3
3b/3 =-87/3
b = -29
if b = -29, we can substitute it into a =21+b
a = 21-29
a = -8
I’m confused , what do you mean?
B and e if you plug it in desmos it gives you direct coordinates
X+1=y and 3y-7=2x are your two equations.
Substitute x+1 in for y
3(x+1)-7=2x
3x+3-7=2x
x-4=0
x=4
Plug in 4 for x in either equation to solve for y
x+1=y
4+1=y
5=y
x=4 and y=5
Hope I could help!
So first you have to add all of those together. So it would all add up to 10. Then you you take how many red chips (3) and put it on top of the fraction to say that there are 3 red chips in a bag of 10 (3/10) then if it has to be a percent, you divide it so 3 divided by 10 is 0.3. But then you move the decimal over 2 places to the right so it would be a 30% chance you would pull a red chip from the bag.