Answer:
Let's solve your equation step-by-step.
−3.1x+7−7.4x=1.5x−6(x−
3
2
)
Step 1: Simplify both sides of the equation.
−3.1x+7−7.4x=1.5x−6(x−
3
2
)
−3.1x+7+−7.4x=1.5x+(−6)(x)+(−6)(
−3
2
)(Distribute)
−3.1x+7+−7.4x=1.5x+−6x+9
(−3.1x+−7.4x)+(7)=(1.5x+−6x)+(9)(Combine Like Terms)
−10.5x+7=−4.5x+9
−10.5x+7=−4.5x+9
Step 2: Add 4.5x to both sides.
−10.5x+7+4.5x=−4.5x+9+4.5x
−6x+7=9
Step 3: Subtract 7 from both sides.
−6x+7−7=9−7
−6x=2
Step 4: Divide both sides by -6.
−6x. /−6
=
2/−6
x=
−1/3
Answer:
D
Step-by-step explanation:
Matrix D represents 3 x 3 identity matrix.
Because all elements of principal diagonal are 1 and others are zero.
Answer:
x = -20, y = -2
Step-by-step explanation:
8y - x = 4
x = 8y - 4
2x - 21y = 2
2(8y - 4) - 21y = 2
16y - 8 - 21y = 2
-5y = 10
y = -2
x = 8(-2) - 4
x = -20
Answer:
For every x feet of rope purchased, the total cost(y) increases by $6.85.
Step-by-step explanation:
