The average distance from Mercury to the sun is approximately 5.79 × 10 7 km. If one kilometer is equal to about 6.68 × 10 –9 astronomical units, about how many astronomical units is the average distance from Mercury to the sun? Write your answer in scientific notation.

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.

answer: its the third option.

step-by-step explanation:

i just took the test.

let y equal to

the total fare and x is the mile of taxi ride. so the equation is

y = 0.55x + 1.75

since susie has

$10 to spend for a taxi cab, so he can have

10 = 0.55x +

1.75

x = 15 miles of

taxi ride

so the system of

inequality is

10 < 0.55x +

1.75

x > 2

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