Answer:
Undefined.
Step-by-step explanation:
Note that the x-coordinate does not change. This indicates that the two points lie on a vertical line. The slope of a vertical line is undefined.
Answer:
25 Feet
Step-by-step explanation:
Im sorry if i am wrong, but it is 25 because the girl is 5 feet, and one feet less of a shadow. So it is obvious to me that the tree is 1 foot larger.
Answer:
0.4 is equal to the fraction <u>2/5</u>
Step-by-step explanation:
0.4 = 4/10
= 2/5
Thus, 0.4 = 2/5
Hope it helps.
Answer:
![2.4\ hours](https://tex.z-dn.net/?f=2.4%5C%20hours)
Step-by-step explanation:
we know that
<em>step 1</em>
<em>Brian can lay a slab of concrete in 6 hours</em>
so
The 100% -------> in 6 hours
using proportion
Find in an hour how much percentage Brian can execute
![\frac{100}{6}\frac{\%}{h}=\frac{x}{1}\frac{\%}{h}\\ \\x=100/6\\ \\x=16.67\%](https://tex.z-dn.net/?f=%5Cfrac%7B100%7D%7B6%7D%5Cfrac%7B%5C%25%7D%7Bh%7D%3D%5Cfrac%7Bx%7D%7B1%7D%5Cfrac%7B%5C%25%7D%7Bh%7D%5C%5C%20%5C%5Cx%3D100%2F6%5C%5C%20%5C%5Cx%3D16.67%5C%25)
<em>step 2</em>
<em>Greg can lay a slab of concrete in 4 hours</em>
so
The 100% -------> in 4 hours
using proportion
Find in an hour how much percentage Greg can execute
![\frac{100}{4}\frac{\%}{h}=\frac{x}{1}\frac{\%}{h}\\ \\x=100/4\\ \\x=25\%](https://tex.z-dn.net/?f=%5Cfrac%7B100%7D%7B4%7D%5Cfrac%7B%5C%25%7D%7Bh%7D%3D%5Cfrac%7Bx%7D%7B1%7D%5Cfrac%7B%5C%25%7D%7Bh%7D%5C%5C%20%5C%5Cx%3D100%2F4%5C%5C%20%5C%5Cx%3D25%5C%25)
step 3
we know that
In one hour (Brian and Greg) execute (16.67%+25%)=41.67%
so
by proportion
Find out how long it will take Brian and Greg to lay a concrete slab working together
![\frac{41.67}{1}\frac{\%}{h}=\frac{100}{x}\frac{\%}{h}\\ \\x=100/41.67\\ \\x=2.4\ hours](https://tex.z-dn.net/?f=%5Cfrac%7B41.67%7D%7B1%7D%5Cfrac%7B%5C%25%7D%7Bh%7D%3D%5Cfrac%7B100%7D%7Bx%7D%5Cfrac%7B%5C%25%7D%7Bh%7D%5C%5C%20%5C%5Cx%3D100%2F41.67%5C%5C%20%5C%5Cx%3D2.4%5C%20hours)