Review: Social Arithmetic, Lines, And Angles

If the sell price is greater than the cost price, it means that the seller is able to sell the product for a higher price than what they initially paid for it. This results in a profit or gain for the seller. Therefore, the statement is true.

A line is defined as a straight path that extends infinitely in both directions. It has no endpoints and continues indefinitely. Therefore, the statement "A line is a straight path that goes on forever in both directions" is true.

The selling price of 100 loaves of bread can be calculated by adding the 15% profit to the buying price of each loaf. The profit for each loaf is 15% of Rp5,000.00, which is Rp750.00. So, the selling price for each loaf is Rp5,000.00 + Rp750.00 = Rp5,750.00. Therefore, the selling price of 100 loaves of bread is Rp5,750.00 x 100 = Rp575,000.00.

The selling price of the camera is Rp2,200,000.00 and the seller has made a 10% profit. To find the buying price, we need to subtract the profit from the selling price. 10% of Rp2,200,000 is Rp220,000. Subtracting this profit from the selling price gives us Rp2,200,000 - Rp220,000 = Rp1,980,000. Therefore, the buying price of the camera is Rp1,980,000.

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The angle of x is 52 degrees.

A ray is not part of a line that has two endpoints. A ray is a part of a line that has one endpoint and extends infinitely in one direction.

Alternate interior angles are formed when a transversal intersects two parallel lines. In this case, angle 3 and angle 7 are alternate interior angles because they are on opposite sides of the transversal and between the two parallel lines.

Supplementary angles are a pair of angles that add up to 180 degrees. In this case, angle x and angle y are supplementary because their measures add up to 180 degrees. Therefore, the relationship between angle x and y is supplementary angles.

The initial savings can be calculated using the formula for compound interest:

A = P(1 + r/n)^(nt)

Where:
A = final amount (Rp2,120,000.00)
P = principal amount (initial savings)
r = annual interest rate (8% or 0.08)
n = number of times interest is compounded per year (assuming it is compounded annually, n = 1)
t = time in years (9 months or 9/12 = 0.75 years)

By substituting the given values into the formula, we can solve for P:

2,120,000 = P(1 + 0.08/1)^(1*0.75)
2,120,000 = P(1.08)^(0.75)
2,120,000 = P(1.065)
P = 2,120,000 / 1.065
P ≈ Rp1,992,800.00

Therefore, the initial savings is approximately Rp1,992,800.00.