Answer:
A = 22.5 m²
Step-by-step explanation:
longest side length
b = √((-7 + 4)² + (-1 - 8)²) = √90
other sides
a = √((-1 + 7)² + (2 + 1)²) = √45
height
h = √((√45)² - (½√90)²) = √22.5
Area of triangle
A = ½bh = ½√90√22.5 = 22.5 m²
a little math shows that this triangle is a tilted half of a square with sides √45
Im sure this is the correct answer, 4x = 21x
Answer:
See below
Step-by-step explanation:
√120 is irrational since it cannot be written as a fraction
√36 is rational because it can be written as 6 or -6 which are both rational
7 is rational because it can be written as a fraction (ex. 7/1, 14/2, 21/3, etc.)
10 is rational because it can be written as a fraction (ex. 10/1, 20/2, 30/3, etc.)
148 is rational because it can be written as a fraction (ex. 148/1, 296/2, 444/3, etc.)
781 is rational because it can be written as a fraction (ex. 781/1, 1562/2, 2343/3, etc.)
Answer:
2 years : $280
10 years: $1400
Step-by-step explanation:
We need to convert both speeds into meters per minute.
27 km/h * (1000 m)/(1 h) * (1 h)/(60 min) = 450 m/min
14 dm/s * (1 m)/(10 dm) * (60 s)/(1 min) = 84 m/min
The difference in speeds is 450 m/min - 84 m/min = 366 m/min
