If x= mass of 1 load of sticks and y= mass of 1 load of bricks and a load of bricks is twice as heavy as a load of sticks y = 2x then,
4x + 4y = 771 ; 4x + 4(2x) = 771 ; 12x = 771 ; x= 64.25 kg
To find y: y = 2x = 2*64.25 = 128.5 kg
Total weight of 1 load of bricks and 3 loads of sticks: y + 3x
128.5 + 3*64.25 = 321.25 kg
Let us say that:
s = speed of Donna
s + 2 = speed of April
Then we are also given that:
t + (25/60) = time of Donna
t = time of April
The distance taken by the two should be equal. We know
that distance is the product of speed and time, so:
s * (t + 25/60) = (s + 2) t
We also know that:
(s + 2) * t = 5
s = 5/t – 2
So that:
(5/t – 2) * (t + 25/60) = 5
5 + 125/60t – 2t – 50/60 = 5
25/12t – 2t – 5/6 = 0
Multiply everything by t:
- 2t^2 – 5/6 t + 25/12 = 0
t^2 + 5/12 t = 25/24
Completing the square:
(t + 5/24)^2 = 25/24 + (5/24)^2
t + 5/24 = ± 1.04
t = -1.25 h, 0.83 h
Since time cannot be negative, therefore t = 0.83 h
So,
(s + 2) * t = 5
s + 2 = 5/0.83 = 6 miles per hour
s = 4 miles per hour
Answers:
speed of Donna = 4 miles / hr
speed of April = 6 miles / hr
Answer:
1/3
Step-by-step explanation:
Take the second term and divide by the first
9/27 = 1/3
Take the third term and divide by the second
3/9 = 1/3
Check each subsequent ratio, we can see the common ratio is 1/3
I can help with A couple producers and a couple decomposes.
Producers would be Plants and trees
Decomposes would be like Fungi
Srry didn’t help much but yea srry
<span>4 cm / 1 year x 10 mm / 1 cm x 1 year / 365 days </span>