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joja [24]
3 years ago
9

Factor completely 81x8 − 1.

Mathematics
1 answer:
Law Incorporation [45]3 years ago
3 0

Answer:

all work is shown and pictured

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Question 7 of 10<br> Choose two statements that are true for this expression.<br> 6r³ − 8x² - 40 +21
crimeas [40]

Based on the given parameters, bhe true statements are: the expression has four terms, and the term -40/y is a ratio.

<h3>How to determine the true statements?</h3>

The expression is given as:

6x^3 - 8x^2 - 40/y + 21

The above expression has four terms, and the terms are:

6x^3, - 8x^2,- 40/y and 21

Also, the term -40/y is a ratio

This is so because it is a quotient of two numbers

Hence, the true statements are: the expression has four terms, and the term -40/y is a ratio, based on the given parameters

Read more about polynomials at:

brainly.com/question/2833285

#SPJ1

4 0
1 year ago
Solve the equations by factoring:<br><br>x^2−3x−40=0<br><br>4x^2−81=0
Alja [10]

Answer:

see explanation

Step-by-step explanation:

Given

x² - 3x - 40 = 0

Consider the factors of the constant term (- 40) which sum to give the coefficient of the x- term (- 3)

The factors are - 8 and + 5, since

- 8 × 5 = - 40 and - 8 + 5 = - 3, thus

(x - 8)(x + 5) = 0 ← in factored form

Equate each factor to zero and solve for x

x - 8 = 0 ⇒ x = 8

x + 5 = 0 ⇒ x = 5

------------------------------------------------------

Given

4x² - 81 = 0 ← this is a difference of squares and factors in general as

a² - b² = (a + b)(a - b), thus

4x² - 81

=(2x)² - 9²

= (2x + 9)(2x - 9) = 0 ← in factored form

Equate each factor to zero and solve for x

2x + 9 = 0 ⇒ 2x = - 9 ⇒ x = - \frac{9}{2}

2x - 9 = 0 ⇒ 2x = 9 ⇒ x = \frac{9}{2}

8 0
3 years ago
Read 2 more answers
Help me, please! I'll give a brainlist point! :)
Allisa [31]

Answer:

105

Step-by-step explanation:

Area of a trapezoid is given by the formula:

A = (a+b)÷2×h

(where h is the vertical height, and a and b are the parallel lines)

Substituting values given gives us:

A = (6+15)÷2×10

A = 21÷2×10

A = 10.5×10

A = 105

Units will be m² as this is area.

7 0
2 years ago
Read 2 more answers
- Rachel earned $54.79 last week. Morgan earned $50.23. About how much more did Rachel earn?​
katovenus [111]

Answer:

Step-by-step explanation:

4.56 $

6 0
3 years ago
Read 2 more answers
A $120 wagon is on sale for 15 percent off. What is the sale price of the wagon?
melamori03 [73]

Answer:

Step-by-step explanation:

120*15%= 18 off

120-18= $102.00 new price

7 0
2 years ago
Read 2 more answers
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