Answer:
A = (a+b)/2
G = sqrt(ab)
Step-by-step explanation:
To find the arithmetic mean, we add the numbers together, then divide by how many numbers
A = (a+b)/2
To find the geometric mean, we multiply the numbers and take the nth root
G = (ab) ^ 1/2
G = sqrt(ab)
Original price of skate board = $130
25% of its price(Discount)= 25/100*130 =$ 32.50
Price after discount = $130-$32.50 = $97.50
Amount Josie has = $90
Amount Josie needs more = 97.50 - 90 = $7.50
Answer:
u = 40° , v = 40° and x = 100°
Step-by-step explanation:
i) from the rule of triangle we know that the sum of all three angles = 180°
ii) 100° + 40° + y = 180°. Therefore y = 40°. where y is the angle adjacent to v.
iii) from theorem on parallel lines we can say that u = y =40°
iv) from the properties of parallel lines we get v = 40° as interior alternate angles are equal.
v) again from the properties of parallel lines we get u = 40°
vi) using the triangle property as in i) we can see that u + v + x =180° therefore 40° + 40° + x = 180°. Therefore x = 100°.
vii) Therefore u = 40° , v = 40° and x = 100°
Answer:yes 5,5
Step-by-step explanation:
Answer;
x = 0.6 and x = -1.75
Step-by-step explanation:
80x2+92x−84=0
Use quadratic formula
x = (−b ±√(b2−4ac))/√2a
x = (-92 ± √(35344)) / 160
x = 95/160 and x = -280 / 160
x = 0.6 and x = -1.75
