Drat it all I am so bad at reading. Sorry about that it is my fault :O
Answer:
1) The value of x= 0.0642
2) 




Step-by-step explanation:
1) Given : A right angle triangle with sides x and 10 and angle is 50°
To find : Value of x
Solution : Since, it is a right angle triangle
Therefore, we apply 
Where Base = x, Hypotenuse= 10, angle = 50°



The value of x= 0.0642
2) Given : 
To find : Value of 
Solution : We have given 

so, B= 7 , H=25
By Pythagoras theorem,





Now, P=24, B=7, H=25





The number of laps that Swimmer A swam was 50 laps.
<h3>How to form mathematical expression from the given description?</h3>
You can represent the unknown amounts by the use of variables. Follow whatever the description is and convert it one by one mathematically. For example if it is asked to increase some item by 4 , then you can add 4 in that item to increase it by 4. If something is for example, doubled, then you can multiply that thing by 2 and so on methods can be used to convert description to mathematical expressions.
Let we suppose that:
Swimmer A swam x laps
Swimmer B swam y laps.
Then, according to the given data, we have:
x + y = 175 laps
y = 25 + 2x
(25 more than twice of laps of A is the number of laps of B).
Thus, we get a system of two equations:
x + 25 + 2x = 175
3x + 25 = 175
3x = 175 - 25 = 150
x = 50
As x is the number of laps Swimmer A swam, thus, the number of laps that Swimmer A swam was 50 laps.
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Based on the calculations, the profit on 96 tins of milk is equal to 384 naira.
<u>Given the following data:</u>
- Quantity of milk = 96 tins
- Cost price = 3360.00 naira
- Selling price = 39.00 naira each.
To calculate the profit on this 96 tins of milk:
<h3>How to calculate profit.</h3>
In this exercise, you're required to determine the amount of profit that was made by Divine for selling 96 tins of milk at 39.00 naira each.
First of all, we would calculate the total sales price or the amount of money he made from selling 96 tins of milk at 39.00 naira each.

Total sales = 3744 naira.
Now, we can calculate the profit by using this formula:

Substituting the parameters into the formula, we have;

Profit = 384 naira.
Read more on cost price here: brainly.com/question/933761
Answer:
1 and 3
Step-by-step explanation:
Given the system of two equations

When you add, subtract, multiply the equations of the system, you get equivalent system of equations (with the same solution).
1. Add these two equations to get the system

Hence, option 1 is correct.
2. Multiply the second equation by 2 and add two equations:

Since
this option is false
3. Subtract two equations:

Option 3 is correct.
4. Since
, option 4 is false
5. Multiply the second equation by 5 and subtract the first equation:

Since
, this option is false.