The answer is 900
900/90=10. Therefore 90/900=1/10
X = pencils, y = pens
8x + 6y = 8.50
4x + 4y = 5.....multiply by -2
----------------
8x + 6y = 8.50
-8x - 8y = -10 (result of multiplying by -2)
-----------------add
-2y = - 1.50
y = -1.50 / -2
y = 0.75 <=== pens cost 0.75
4x + 4y = 5
4x + 4(0.75) = 5
4x + 3 = 5
4x = 5 - 3
4x = 2
x = 2/4
x = 0.50 <== pencils cost 0.50
Answer:
81?
Step-by-step explanation
i might be wrong, if am delete this haha
Answer:
A
Step-by-step explanation:
because 3-8= -5
and -2-3=-5
Answer:
(-1, -5)
it is a absolute value equation :)
