Answer:
6.55 cm
Step-by-step explanation:
A triangle is a polygon with three sides and three angles. Types of triangles are isosceles, acute, scalene, obtuse, right and equilateral triangle.
Cosine rule is used to show the relationship between sides and angles of a triangle. If a, b, and c are sides of a triangle, while A, B, and C are angles opposite to the corresponding sides. Then:
c² = a² + b² - 2ab*cos(C)
Given that PR = 13 cm, PQ = 12 cm and angle QPR = 30°, hence:
QR² = PR² + PQ² - 2(PR)(PQ)cos(∠QPR)
QR² = 13² + 12² - 2(13)(12)cos(30) = 169 + 144 - 270
QR² = 43
QR = 6.55 cm
Answer:The girl will get $2,000, the mother $4,000 and the boy $8,000
Step-by-step explanation:
f the amount the girl gets = x
The mother gets twice as much as the girl = 2x
And the boy get twice as much as the mother = 4x
Overall
x + 2x + 4x = $14,000
7x = $14,000
Divide both sides by 7 so
x=$2,000
y=9
Step-by-step explanation:
y=2(6)-3
y=12-3
y=9
A, 39
You can get the average score by adding up all the total scores, (33, 41, 33, 45 and 43) and dividing that by the total number of scores, 5. 195 (total score)/5 (number of scores)= 39.
