Review: Social Arithmetic, Lines, And Angles

1) If Sell price is greater than Cost price then the seller is said to have profit or gain.

True

False

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.

Explanation

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.

2) A line is a straight path that goes on forever in both directions.

True

False

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.

Explanation

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.

3) The selling price of camera is Rp2,200,000.00, the seller has made 10% profit. The buying price of the camera is ...

1.900.000,-

2.000.000,-

1.980.000,-

2.420.000,-

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.

Explanation

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.

4) The buying price of a loaf of bread is Rp5,000.00. The bread is sold with 15% profit. The selling price of 100 loaves of bread is ....

Rp625,000.00

Rp500,000.00

Rp575,000.00

Rp425,000.00

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.

Explanation

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.

5) A ray is part of a line that has two endpoints.

True

False

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.

Explanation

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.

6) The value of x is ...

90o

47o

57 o

133o

not-available-via-ai

Explanation

not-available-via-ai

Submit

8) Angle ∠3 and angle ∠7 are ___.

Alternate Interior Angles

Same-side Interior Angles

Corresponding Angles

Opposite vertical angles

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.

Explanation

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.

9) The relationship between angle x and y is...

Opposite angles

At the point angles

Complementary angles

Supplementary angles

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.

Explanation

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.

10) Mrs. Dhila keeps money in the bank with 8% interest a year. If after 9 months the savings become Rp2,120,000.00, then the initial savings is ....

Rp1,950,400.00

Rp2,000,000.00

Rp1,992,800.00

Rp2,240,000.00

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.

Explanation

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.