Find the solution to the system of equations, x + 3y = 7 and 2x + 4y = 8. 1. Isolate x in the first equation: x = 7 − 3y 2. Substitute the value for x into the second equation: 2(7 − 3y) + 4y = 8 3. Solve for y: 14 − 6y + 4y = 8 14 − 2y = 8 −2y = −6 y = 3 4. Substitute y into either original equation: x = 7 − 3(3) 5. Write the solution as an ordered pair: ( , )

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.