The sum of two numbers is 80. if twice the smaller number is subtracted from larger number, the result is 17 find the two numbers

59 & 21

Step-by-step explanation:

so this probably won't be the best explanation, but here goes:

For the sake of knowing the two numbers aren't equal to each other, I decided to do variables n and x, so:

n+x=80

Now we need to find the value of n:

So the question sets this up as

n-2x=17. We need to change the equation so that we're solving for n, so: n=17+2x

Next we need to solve n+x=80, to do that we need to make it into x=80-n

Now that they're set up like this we can do : 80-n=17+2x.

I honestly don't know how to explain it the rest of the way but if you plug in those two numbers they should be right.

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,