Using substitution:
13(y+6)-6y=22
13y+78-6y=22
7y+78=22
/// -78 -78
7y=-56
÷7 ÷7
y=-8
x=y+6
x=-8+6
x=-2
So, x equals -2 and y equals -8.
In 3 hours half of 700 would be 700/2=350
in 3 more hours, so 6 total, the half life would be 350/2 = 175
in 3 more hours, 9 total, the half life would be 175/2 = 87.5
in 3 more hours, 12 total, the live life would be 87.5 / 2 = 43.75
so it would be 12 hours to have less than 50 mg
Answer:
2 cm = 50 km
Find what the rate would be if 2 became 10 by dividing
10/2=5
multiply the 5 with the rate
5 x 50 = 250
250 km apart
hope this helps
Step-by-step explanation:
Let us say, the integer is "a"
5 times a, is 5*a or 5a
now adding its square and 5a is 336 simply means
![a^2 + 5a = 336](https://tex.z-dn.net/?f=a%5E2%20%2B%205a%20%3D%20336)
solve for "a"
Answer:
![\huge\colorbox{pink}{✏﹏ \: 3 cm\: }](https://tex.z-dn.net/?f=%5Chuge%5Ccolorbox%7Bpink%7D%7B%E2%9C%8F%EF%B9%8F%20%5C%3A%203%20cm%5C%3A%20%7D)
Step-by-step explanation:
Diameter (d) = 6 cm
Radius (r) = ?
![r = \frac{d}{2} \\ r = \frac{6}{2} \\ r = 3 \:cm](https://tex.z-dn.net/?f=r%20%3D%20%20%5Cfrac%7Bd%7D%7B2%7D%20%20%5C%5C%20r%20%3D%20%20%5Cfrac%7B6%7D%7B2%7D%20%20%5C%5C%20r%20%3D%203%20%20%5C%3Acm)
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