<u>Answer:</u>
Cost of sand = £150
Cost of bricks = £157.5
Cost of cement = £134
Total cost = £441.50
<u>Step-by-step explanation:</u>
We are given that:
2 tonnes of sand is for £75.00 per tonne,
20 bags of cement are for £6.70 per bag,
350 bricks at 45p each,
So, 2 tonnes of sand at £75.00 per tonne = 2 * £75.00 = £150.00
20 bags of cement at £6.70 per bag = 20 * £6.70 = £134.00
350 bricks at 45p each = 350 * £0.45 = £157.50
Therefore, the total cost of all the materials = £150 + £134 + £157.5 = £441.50
Step-by-step explanation:
(22 + (-6/20) × (214 - 10 ( -6/20)) - (284.75)
(22 - 6/20) × (214 + 60/20) - (284.75)
(22 - 0.3) × (214 + 3) - (284.75)
(21.7 × 217) - 284.75
4708.9 - 284.75
= 4424.15
The first equation is linear:
Divide through by
to get
and notice that the left hand side can be consolidated as a derivative of a product. After doing so, you can integrate both sides and solve for
.
- - -
The second equation is also linear:
Multiply both sides by
to get
and recall that
, so we can write
- - -
Yet another linear ODE:
Divide through by
, giving
- - -
In case the steps where we multiply or divide through by a certain factor weren't clear enough, those steps follow from the procedure for finding an integrating factor. We start with the linear equation
then rewrite it as
The integrating factor is a function
such that
which requires that
This is a separable ODE, so solving for
we have
and so on.
Answer:
10-3x
Step-by-step explanation:
let the number=x
thrice the number becomes 3x
$16 I don’t have time to explain sorry I’m helping as many ppl as I can