Answer:
Step-by-step explanation:
we have to move 5 in the other side with a different sign, to get a 2 grade ecuation
now we know
a=2
b=9
c=-5
we have to find delta
and now we have to use the formula to find the root square
Just to help you, that formula is saying that 1 mile is equivalent to 5280 feet, i.e. the number of feet is equal to 5280 * number of miles.
So, you know the number of feet = 21,120 and have to convert that into the equivalent number of miles:
f = 5280m => m = f / 5280
m = 21,120 / 5280 = 4 miles
Answer: 4 miles
<span>length = 7x
</span><span>width = 2x
2(7x + 2x) = 72
7x + 2x = 72/2
9x = 36
x = 36/9
x = 4
</span>
width = 2x = 2 * 4 = 8 units<span>
</span>
Answer:
the last one is your answer !
Step-by-step explanation:
24 x 20 = 480
1. 24 + 30 = 54
2. 20 x 20 x 4 x 20 = 32000
3. 20 + 20 + 4 + 20 = 64
4. 20 x 20 + 4 x 20 = 480
<em><u>so number 4 is your answer :)</u></em>
Answer: x= -0.3,2
Step-by-step explanation:
Combine your like terms then solve.
