The answer would be s=-60
The first set of expressions bc 3x is equivalent to 3x and -7y is equivalent to -7y
50(4)= 200
There are 200 pattern blocks.
Hope this helps!
Answer:

Step-by-step explanation:

* The above answer is written in reverse, which is the exact same result.
I am joyous to assist you anytime.
The answer is 5
2 translates to 10 after being multiplied by 5
1 translated to 5 after being multiplied by 5
Hope this helped :)