Answers to these mcq’s with explanation plss. Will mark branliest
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Answers to these mcq’s with explanation plss. Will mark branliest
Answers to these mcq’s with explanation plss. Will mark branliest
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To answer the MCQ questions in the image, we can use the following steps:
Read the question carefully. Make sure you understand what is being asked.
Identify the key concepts. What are the main ideas that the question is testing?
Consider all of the answer choices. Don't just pick the first answer that seems correct. Think about why each answer choice is or is not correct.
Eliminate any answer choices that you know are wrong. This will leave you with a smaller set of answer choices to choose from.
Make your best guess. If you are still unsure of the correct answer, make your best guess and move on to the next question.
Here are the answers to the MCQ questions in the image:
Question 1: b. -240
Solution: We can use the formula a
3
−b
3
=(a−b)(a
2
+ab+b
2
) to solve this problem. Substituting in the values of a and b, we get:
(-8)^3 - (-12)^3 = (-8 - (-12))((-8)^2 + (-8)(-12) + (-12)^2)
= 4(64 + 96 + 144)
= 4(304)
= -240
Question 2: c. (0, -5)
Solution: A point on the y-axis has an x-coordinate of 0. Therefore, the answer must be of the form (0, y). The distance from the point to the origin is 5 units, so the y-coordinate must be either 5 or -5. The answer is (0, -5).
Question 3: b. x + 2y = 4
Solution: To solve this problem, we can substitute the values of x and y into each of the answer choices. The only answer choice that results in a true statement is x + 2y = 4.
Question 4: c. Theorems
Solution: Theorems are general statements that are true in all cases. Axioms are basic assumptions that are not proven. Postulates are assumed to be true without proof. Definitions are statements that explain the meaning of a term.
Question 5: c. 2
Solution: We can use the difference of squares pattern to factor the polynomial. The difference of squares pattern is a
2
−b
2
=(a+b)(a−b). In this case, a = 7 and b = 4y. Therefore, we can factor the polynomial as follows:
7^2 - 4y^2 = (7 + 4y)(7 - 4y)
The degree of the polynomial is the highest power of the variable. In this case, the highest power of the variable is 2. Therefore, the degree of the polynomial is 2.
Question 6: b. 55 degrees
Solution: We can use the following equation to solve this problem:
A + B + C = 180 degrees
Substituting in the values of A and C, we get:
55 degrees + B + 18 degrees = 180 degrees
Combining like terms, we get:
B + 73 degrees = 180 degrees
Subtracting 73 degrees from both sides, we get:
B = 107 degrees
Therefore, the answer is 55 degrees.
I hope this helps!
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