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natali 33 [55]
3 years ago
7

The expression 9a^2-64b^2 is equivalent to

Mathematics
1 answer:
Nonamiya [84]3 years ago
8 0
9 a^{2} -64 b^{2} =(3a-8b)(3a+8b)

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( - 3x + 4) – (x^2– 3x + 7)
Helga [31]

Answer:

−x^2−11

Step-by-step explanation:

Distribute the Negative Sign:

=−3x−4+−1(x^2−3x+7)

=−3x+−4+−1x^2+−1(−3x)+(−1)(7)

=−3x+−4+−x^2+3x+−7

Combine Like Terms:

=−3x+−4+−x^2+3x+−7

=(−x^2)+(−3x+3x)+(−4+−7)

=−x^2+−11

5 0
3 years ago
Pe lingNeed 2 yards of fabric for a craft project she has 3 feet already how many inches of fabric does she need still need
icang [17]

Answer:

36 inches

Step-by-step explanation:

12 inches equals 1 foot

There is 3 feet in a yard

2 yards equals 6 feet

1 yard equals 36 inches

3 0
4 years ago
A baseball fan is seated in the upper deck of a stadium 200 feet away from
Mrac [35]

Please find attached to this answer a well labelled diagram of the triangle

Answer:

Approximately 176.6 feet

Step-by-step explanation:

From the question, we are to find the height at which the baseball fan was sitting.

From the attached diagram the height at which the fan was sitting is equivalent to the opposite side of the triangle.

Hence , the appropriate trigonometric function to use to solve this question is the sine function.

Sine = Opposite / Hypotenuse

Opposite is unknown so we refer to it as Y

Hypotenuse = 200feet

While the Angle of depression = 62°

Therefore,

Sine 62° = Y/ 200 feet

Cross multiply

Sine 62° × 200 feet = Y

Y = 176.58951857 feet

Approximately 176.6 feet

Therefore , the height at which the fan is sitting is 176.6 feet

8 0
3 years ago
Six less than two thirds of a number is negative ten. Find the number
Stolb23 [73]
2/3x-6=-10
*3            *3                        Multiply both sides by 3
2x-18=-30
    +18  +18                         Add 18 to both sides
2x=-12
_____
2                                        Divide both sides by 2
x=-6                                   The number = -6

8 0
3 years ago
What is 9411 rounded to the nearest thousand
Dmitrij [34]
9000 is the answer because it is less than 500 and is in the 9 thousand position
4 0
3 years ago
Read 2 more answers
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