One hundred and eighty erasers
Answer:
-2 ~ brainliest please?
Step-by-step explanation:
-32x=64
32x=-64
x=-2
Answer:
48
Step-by-step explanation:
add all the numbers up and divide by number of numbers
Answer:
Step-by-step explanation:
First, rewrite the equation (all terms should be in the left side):
![5y^2-8y-2=0.](https://tex.z-dn.net/?f=5y%5E2-8y-2%3D0.)
In this equation,
Then the discriminant
![D=b^2 -4ac=(-8)^2-4\cdot 5\cdot (-2)=64+40=104.](https://tex.z-dn.net/?f=D%3Db%5E2%20-4ac%3D%28-8%29%5E2-4%5Ccdot%205%5Ccdot%20%28-2%29%3D64%2B40%3D104.)
Then
![y_1=\dfrac{-b+\sqrt{D}}{2a}=\dfrac{-(-8)+\sqrt{104}}{2\cdot 5}=\dfrac{8+2\sqrt{26}}{10}=\dfrac{4+\sqrt{26}}{5},\\ \\y_2=\dfrac{-b-\sqrt{D}}{2a}=\dfrac{-(-8)-\sqrt{104}}{2\cdot 5}=\dfrac{8-2\sqrt{26}}{10}=\dfrac{4-\sqrt{26}}{5}.](https://tex.z-dn.net/?f=y_1%3D%5Cdfrac%7B-b%2B%5Csqrt%7BD%7D%7D%7B2a%7D%3D%5Cdfrac%7B-%28-8%29%2B%5Csqrt%7B104%7D%7D%7B2%5Ccdot%205%7D%3D%5Cdfrac%7B8%2B2%5Csqrt%7B26%7D%7D%7B10%7D%3D%5Cdfrac%7B4%2B%5Csqrt%7B26%7D%7D%7B5%7D%2C%5C%5C%20%5C%5Cy_2%3D%5Cdfrac%7B-b-%5Csqrt%7BD%7D%7D%7B2a%7D%3D%5Cdfrac%7B-%28-8%29-%5Csqrt%7B104%7D%7D%7B2%5Ccdot%205%7D%3D%5Cdfrac%7B8-2%5Csqrt%7B26%7D%7D%7B10%7D%3D%5Cdfrac%7B4-%5Csqrt%7B26%7D%7D%7B5%7D.)
-- The area of the kitchen floor is (11.5 ft) x (9.5 ft) = 109.25 square ft.
-- The area of each tile is (0.5) x (0.5) = 0.25 square ft.
-- If the tiles are carefully placed, with no overlap and no big sloppy spaces
between them, the number of tiles required to cover the floor is
(109.25 ft²) / (0.25 ft²/tile) = 437 tiles .