MATHEMATICS HIGH SCHOOL

Factor completely 4x2 − 81.(4x − 9)(x + 9)

(2x + 9)(2x + 9)

(2x + 9)(2x − 9)

(2x − 9)(2x − 9

Answers

Answer 1

Answer:

The factored expression of $4x^2 - 81$ is $(2x - 9)(2x + 9)$

The expression is given as:

$4x^2 - 81$

Express 4 as the square of 2.

So, we have:

$2^2x^2 - 81$

Rewrite the expression as:

$(2x)^2 - 81$

Express 81 as the square of 81

$(2x)^2 - 9^2$

Rewrite the expression as the difference of two squares

$(2x - 9)(2x + 9)$

Hence, the factored expression of $4x^2 - 81$ is $(2x - 9)(2x + 9)$

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B.angle C is congruent to angle E
C.line segment BC is congruent to line segment EF
D.angle A equals angle D"

Answers

Answer:

option B angle c is congruent to angle E

Step-by-step explanation:

because if ∆ABC is congruent to ∆DEF than angle C should be equal to angle F

C^4 divided by c^3

Please help

Answers

Step 1:

→ ${c}^(4) / {c}^(3)$

Step 2:

→ $\frac{ {c}^(4) }{ {c}^(3) }$

Step 3:

→ ${c}^(4 - 3)$

Step 4:

→ ${c}^(1)$ (c¹ and c is same thing)

________________________________

with regards!

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Answer:

Answer is C

Step-by-step explanation:

i.e (c x c x c x c) / (c x c x c) = c^1 = c

0.21 =0.7 true or false
0.21 = 0.3 true or false

Answers

Both false
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Mr. Jack bought 150 T-shirts for $1920 from a factory. What is the amount Mr. Jack received after selling all the T-shirts?

Answers

Final answer:

We need to know about profit and loss in order to solve the problem. The cost of one shirt is $12.80, the amount of money Mrs. Jackson received after selling all t-shirts is $2,998.50, the total profit made is $1,078.50 and the profit percentage is 56.17%.

Explanation:

We know that Mrs. Jackson bought 150 t-shirts for $1920, we need to first find the cost of one t-shirt, we can do that by dividing the total cost by the number of t-shirts.

Cost of one = 1920 / 150 = $12.80

Next we need to find the total selling price of all the t-shirts given that each t-shirt is sold at $19.99

Total selling price = 150 × $19.99 = $2,998.50

The total profit made by Mrs. Jackson can be calculated by subtracting the cost price from the selling price.

Profit = $2,998.50 - $1,920 = $1,078.50

The profit percentage with respect to the cost price can be calculated as

Profit percentage = ($1,078.50 / $1,920) × 100 = 56.17%

Therefore, the cost of one shirt is $12.80, the amount of money Mrs. Jackson received after selling all t-shirts is $2,998.50, the total profit made is $1,078.50 and the profit percentage is 56.17%.

Final answer:

The amount Mr. Jack received after selling all the T-shirts is $1920.

Explanation:

In order to find out the amount Mr. Jack received after selling all the T-shirts, we need to determine the selling price of each T-shirt. To do this, we divide the total amount Mr. Jack spent on the T-shirts ($1920) by the number of T-shirts he bought (150). The selling price per T-shirt is $12.80.

Now, to find the amount Mr. Jack received after selling all the T-shirts, we multiply the selling price per T-shirt ($12.80) by the number of T-shirts he bought (150). The amount Mr. Jack received after selling all the T-shirts is $1920.

Learn more about selling price here:

brainly.com/question/32846197

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Check my answer please? If p varies directly with q, and p = 8 when q = 2, what is the value of p when q = 7?

A.
p = 40

B.
p = 100

C.
p = 28

D.
p = 1

i think that it's c.

Answers

yes you are right it's C

It a grade 9 please help me do this I don’t really understand it at all

Answers

Final answer:

The question lacks specific details, making it impossible to provide a structured and detailed response designed to meet the student's needs.

Explanation:

As the student question has not provided specific details or context about the topic they're struggling with, it's impossible to provide a clear, factual, and step-by-step explanation targetted to their needs. It is highly recommended that the student provides more details about the subject or the exact problem they are encountering in their grade 9 course to receive a structured and effective response. To help you understand better, could you please provide the specific question or topic you need assistance with? That way, I can provide a step-by-step explanation and relevant examples to help you.