Answer:
Hello :))
Step-by-step explanation:
You should set this up as a proportion equation. 8.1kg /1hr =x/7hr You would cross multiply here and end up getting the equation... 1x=8.1*7 (x=56.7 kg)
Hope this helps! :))
Answer:
1
Step-by-step explanation:
27 divided by 26.
If the legs of a right triangle are lengths a and b and the hytponuse is legnth c then
a²+b²=c²
so if the hyptonuse is 20 then
a²+b²=20²
a²+b²=400
hmm, what combos can we do?
find the values of a and b such taht they are whole numbers and a²+b²=400
looking at all the squares from 1 to 20
1²=1
2²=4
3²=9
4²=16
5²=25
6²=36
7²=49
8²=64
9²=81
10²=100
11²=121
12²=144
13²=169
14²=196
15²=225
16²=256
17²=289
18²=324
19²=361
20²=400
which pairs add up to 400?
the only pair is 144+256 which is 12²+16²
the legs are length 12 units and 16 units
We can turn this word problem into the following equation:
x^2 + 85 = (x - 17)^2
x^2 + 85 = x^2 - 34x + 289
-85 -85
_______________________
x^2 = x^2 - 34x + 204
+34x +34x
_______________________
x^2 + 34x = x^2 + 204
-x^2 -x^2
____________________
34x = 204
Divide 34 on both sides
x = 6.
The number is 6.