Answer:
y=-1
x=3
Step-by-step explanation:
7x+2y=19-----(1)
7x+8y=13------(2)
(1)-(2)
(7x+2y)-(7x+8y)=19-13
7x+2y-7x-8y=6
+2y-8y=6
-6y=6
y=-1
by substitute in (1)
7x+2*(-1)=19
7x-2=19
7x=19+2
7x=21
x=21/3
x=3
Answer:
-27
Step-by-step explanation:
f(a) = -3a + 3
f(10) = -3(10) + 3
= -30 + 3
= -27
4.825.48623 i think not sure
