We know that
the formula for combinations is
nCr=n!/[(n-r)!*r!]
n is the total number of objects
r is the number that you choose to arrange
in this problem
n=5
r=2
C=5!/[(5-2)!*2!]------> C=5!/[(3)!*2!]-----> C=5*4*3!/[3!*2!]
C=20/2----> C=10 ways
the answer is
10 ways
Answer:
The discounted price would thus be 75% of the original price given the discount
75% x 2240 = 75/100 x 2240= 1680
<em>Coefficient of y is 3 in the given expression.</em>
Answer:
x = 20°
y = 70°
Step-by-step explanation:
the angle adjacent to the 40° angle must be 140° because the two angles form a straight line (which contains 180°)
in the isosceles triangle with the 'x', that means the other two angles must be equal and are (180-140) ÷ 2, which equals 20°
to find 'y', consider the larger right triangle with angles of 90° and 20°; angle y must equal 180 - (90 + 20) = 70°