Answer:
x=0.5 and y=5
Step-by-step explanation:
8x+7y=39...eqn(1)×-14
4x-14y=-68...eqn(2)×7
we now have,
-112x-98y=-546
-(28x-98y=-476)
-140x÷-140 =-70÷-140
x=0.5
to solve for y, we substitute (x=0.5) into eqn (1) or eqn 2 which ever you want...
so I'm using eqn 1.
8x+7y=39
8(0.5)+7y=39
7y=39-4
7y÷7=35÷7
y=5
therefore, x=0.5, y=5
proof: substitute both x and y values to get you the same answer as the original solutions in both equations.
we have,
8(0.5)+7(5)=39
4(0.5)-14(5)=-68
Answer:
s
Step-by-step explanation:
s
B Is Supposed To Be (45*25) That’s Where You Messed Up So V= (45*25)(12) = 13500
Answer:
your answer is gonna be D!
Step-by-step explanation:
2x
2
+16x−7x−56
2 Collect like terms.
2{x}^{2}+(16x-7x)-56
2x
2
+(16x−7x)−56
3 Simplify.
2{x}^{2}+9x-56
2x
2
+9x−56
Answer:
3/14
Step-by-step explanation:
P (B then B) = 4/8 x 3/7 or 1/2 x 3/7
