Answer:
Step-by-step explanation:
By triangle sum theorem,
73°+ 39° + m∠1 = 180°
m∠1 = 180° - 102°
m∠1 = 78°
Since, m∠1 = m∠2 [Vertically opposite angles]
m∠2 = 78°
Sum of interior angles of a polygon = (n - 2)×180°
Where n = number of sides of the polygon
Sum of the interior angles of a quadrilateral = (4 - 2)×180°
= 360°
Therefore, 77° + m∠3 + 90° + m∠2 = 360°
77° + m∠3 + 90° + 78° = 360°
m∠3 = 360° - 245°
m∠3 = 115°
Answer:
Let x and y be numbers of bicycles and tricycles, respectively
x
+
y
=
7 (i)
2
x
+
3
y
=
19 (ii)
Multiplying (1) by 2 gives:
2
x
+
2
y
=
14 (iii)
Subtracting (iii) from (ii) gives:
y
=
19
−
14
=
5
Substituting 5 for y in (i) gives:
x=7−5=2
Therefore there are 2 bicycles and 5 tricycles.
Step-by-step explanation:
T^2-t=12
t^2-t-12=0
(t-4)(t+3)=0
<span>t=4, -3</span>
Answer:
x=33
Step-by-step explanation:
Let x = # of coffee mugs sold
x * 3.50 = 115.50
Divide by 3.50 => x=33
Answer:
you need to use the before change and after method