Answer:
d
Step-by-step explanation:
Solution by substitution method
y=7x+8
∴y-7x=8
and y=x+20
∴y-x=20
Suppose,
-7x+y=8→(1)
and -x+y=20→(2)
Taking equation (1), we have
-7x+y=8
⇒y=7x+8→(3)
Putting y=7x+8 in equation (2), we get
-x + 7x + 8 = 20
6x = 20-8
6x = 12
x= 12 / 6
x = 2
substitute for x in equation (3)
y = 7(x) + 8
y = 7(2) + 8
y = 22
-214 x -412 = 88,168
“Product” means the answer you get from multiplying two or more numbers together.
* Tip: A negative number times another negative number equals a positive.
Hope this helps!
Answer:
31.8 that is it I just need to fill a 20 character long answer
$7.20
(Seven Dollars and Twenty Cents)
Answer:
d) none of the above
Step-by-step explanation:
correct me if wrong .
