Ф=angle between the ladder and the ground.
cos Ф= adjacent / hypotenuse
cos Ф=1.5 m / 4 m=0.375
Ф=arccosine 0.375=67.98º≈68º
The angle between the ladder and the ground is 68º
Answer:
teal
Step-by-step explanation:
brown blue green and teal are the only eye colors out there
X^3 - y^3 + z
this is a trinomial because it has 3 terms
this is a 3rd degree one
so u have a 3rd degree trinomial
Answer: the price of each bagel is $0.55 and each doughnut is $0.7
Step-by-step explanation:
Let x represent the price of each bagel.
Let y represent the price of each doughnut.
One of them bought 7 bagels and 5 doughnuts, and paid $7.35. This is expressed as
7x + 5y = 7.35 - - - - - - - - - - - - - 1
The other customer bought 4 bagels and 6 doughnuts, and paid $6.40. This is expressed as
4x + 6y = 6.4 - - - - - - - - - - - - - 2
Multiplying equation 1 by 4 and equation 2 by 7, it becomes
28x + 20y = 29.4
28x + 42y = 44.8
Subtracting, it becomes
- 22y = - 15.4
y = - 15.4/ - 22
y = 0.7
Substituting y = 0.7 into equation 1, it becomes
7x + 5 × 0.7 = 7.35
7x + 3.5 = 7.35
7x = 7.35 - 3.5
7x = 3.85
x = 3.85/7
x = 0.55