Answer:
D) 7 1/2
Step-by-step explanation:
-3 ÷ -2/5 =
-3 x -5/2 =
-3 x -2.5 =
7.5 =
7 1/2
Simplify. Combine like terms
17k - 10k + 15
(17k - 10k) + 15
17k - 10k = 7k
7k + 15 is your answer
hope this helps
Answer:
Every polynomial with rational coefficients has the same roots as one with integer coefficients; just multiply through by the common denominator. The complex roots of such polynomials come as conjugate pairs.
If the track is 10km long, and X travels at 40 km/h, it will take 1 hour to do 4 laps. this means that car X will do one lap in 15 minutes. Y travels at 30 km/h, which means it will do 3 laps in 1 hour, meaning that car X will do 1 lap in 20 minutes.
X- 15, 30, 45, 60
Y-20, 40, 60
Therefore, after an hour, they will pass again.
So first we solve and simplify
pemdas
first parenthasees
9-4(x-y)=-6x+6
distribute using distributeive property of multiplication which is a(b+c)=(ab)+(ac)
so -4(x-y)=-4x+4y
9-4x+4y=-6x+6
add 6x to both sides
9+2x+4y=6
subtract 9 from both sides
2x+4y=-3
only B matches this
B is the correct answer
(I don't know what standard form is but I know what simplified is)
