Can you please answer both and show work

Mathematics

2 answers:

Effectus [21]3 years ago

6 0

90*.1=9

90-9=81

190*.200=38

190-38=152

152

Zolol [24]3 years ago

5 0

The first one equals 9. Because: 10 x 90 ÷ 100 = 9

The second one equals 380. Because: 200 x 190 ÷ 100 = 380

Hope this helps!!-Aparri

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Solve the system using substitution.

elixir [45]

Hi there...

Solve the system using substitution.
2x + 2y = 38
y = x + 3

We need to solve y = x+ 3 for y
substitute x + 3 for y in 2x + 2y = 38
2x + 2y = 38
Now replace x+3 everywhere there's y
2x + 2(x+3) = 38
2x + 2x + 6 = 38
4x + 6 = 38
4x = 38 - 6
4x = 32
x = 32/4
x = 8
Now, we have the number of x which is gonna help us find y
what we gonna do is replace 8 everywhere we see an x so we find y. Please follow me :)

Substitute 8 for x in y = x + 3
y = 8 + 3
y = 11
Final answer : x = 8 and y = 11
The correct option is A

If you have any further questions about my answer please let me know.

By the way.... I would be happy to help you with the other 10 :)

Good luck !