First you multiply 450 m ×300 m= 135,000 m
Then you convert to Kilometers 135,000 ÷1,000= 135 Kilometers
So the answer is 135 Kilometers
X= -8/5y+16
y= -5/8x+10
you didnt say if the equation was "5x+8y=80" not sure if your adding or subtracting or adding but if your adding then this is correct :)
Answer:

Step-by-step explanation:
<u>Given number:</u>
29,980,000,000
<u>Rules:</u>
- Move the decimal point after the first non-zero digit. (after 2)
- Here, we will move the decimal point 10 places to the left to move it after the first non-zero digit.
- Since we move the decimal point 10 places, we will write the number as a multiple of 10¹⁰ (10 being the exponent).
<u>The number will become:</u>
2.998 × 10¹⁰
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)
In your question, 45 is not a perfect square.
A perfect square is when you divide or multiply the number by itself.
36 is a perfect square because it's factor is 6 x 6 (6,6).
<span>64 is a perfect square because it's factor is 8 x 8 (8,8).
</span><span>81 is a perfect square because it's factor is 9 x 9 (9,9).</span>
Step-by-step explanation:
a-b
a=1/4
b= -2,15 -215/100 semplification -43/20
1/4-(-43/20)
1/4+43/20 minimum comune multiple
5+43/20=
48/20=12/5