15/2 = 7.5
12/2 = 6
7.5 + 6 = 13.5
It should take them 13.5 hours to finish one room together
S4=a1- a4 r / 1-r
=7- 448*4 / 1-4
=7- 1792 / -3
=-1785/-3
=595
Given:
The area of rectangular garden is
square units.
To find:
The length and width of the cucumber field.
Solution:
The area of a rectangle is:
![A=l\times w](https://tex.z-dn.net/?f=A%3Dl%5Ctimes%20w)
Where l is length and w is width of the rectangle.
The area of rectangular garden is
square units.
We need to find the factors of
to get the length and width.
![A=x^2-4x-21](https://tex.z-dn.net/?f=A%3Dx%5E2-4x-21)
Splitting the middle term, we get
![A=x^2-7x+3x-21](https://tex.z-dn.net/?f=A%3Dx%5E2-7x%2B3x-21)
![A=x(x-7)+3(x-7)](https://tex.z-dn.net/?f=A%3Dx%28x-7%29%2B3%28x-7%29)
![A=(x-7)(x+3)](https://tex.z-dn.net/?f=A%3D%28x-7%29%28x%2B3%29)
Area of a rectangle is the product of length and width.
Therefore, the length and width of the rectangle are
units and
units.
Answer:
-20 and -3
Step-by-step explanation:
-20*-3= 60 (remember, two negatives multiplied equals a positive)
-20+-3=-23
Hope this helps!
The mnemonic SOH CAH TOA helps you remember the relevant trig relationship is
Sin(α) = Opposite/Hypotenuse
sin(α) = (1 ft)/(14 ft)
α = arcsin(1/14) ≈ 4°
The angle the ramp makes with the sidewalk is 4°.