Will mark BRAINLIEST if correct.

The scale factor SF = ⇒ C

Step-by-step explanation:

If the point (x, y) dilated by a scale factor n, then the coordinates of its image are (n x, n y)

Let us solve the question

∵ The coordinates of the point K are (-3, 6)

∴ x = -3 and y = 6

∵ The coordinates of its image k' are (-7, 14)

→ From the rule above the image is (n x, n y)

∵ The scale factor is n

∴ n x = -7

∴ n y = 14

→ Substitute x by -3

∵ n (-3) = -7

∴ -3n = -7

→ Divide both sides by -3

∵ =

∴ n =

→ Substitute y by 6

∵ n (6) = 14

∴ 6n = 14

→ Divide both sides by 6

∵ =

∴ n =

→ Both coordinates gave the same value of n

∴ The scale factor SF =

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

24

step-by-step explanation:

the graph shows 30% of students walk. 80 students were questioned, so the number that said they walk is

30% × 80 = 0.30 × 80 = 24