Two angles of a quadrilateral measure 210° and 40°. The other two angles are in a ratio of 2:9. What are the measures of those two angles?

Angles in the ratio 2:9 are 20° and 90° respectively.

Step-by-step explanation:

Sum of the angles of a quadrilateral = 360°

⇒ 2x + 9x + 210° + 40° = 360°

⇒ 11x + 250° = 360°

⇒ 11x = 360 - 250 = 110°

⇒ x = 110/11 = 10

∴ Angles are 2x = 20° and 9x = 90°

0.16 or 16%

step-by-step explanation:

lets take a coin for example.

if you toss it twice, it has a 1/4 chance of landing on heads both times because 1/2 * 1/2 is 1/4.

with the cards, the chance of picking dog is 0.4. having two people pick one is like picking a card twice in a row. so 0.4 * 0.4 is 0.16, or 16%

= 5

step-by-step explanation:

to find the 15th term substitute n = 15 into the nth term formula

= (- 3 × 15 ) + 50 = - 45 + 50 = 5