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bekas [8.4K]
3 years ago
5

How to factor this expression: x^2-9?

Mathematics
1 answer:
Lena [83]3 years ago
7 0

Answer:

(x+3)(x-3)

Step-by-step explanation:

rewrite "9" as 3^2

so it is x^2-3^2

You use the difference of squares: a^2-b^2=(a+b)(a-b)

apply it: (x+3)(x-3)

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Corbin made a scale model of the San Jacinto Monument. The monument has an actual height of 604 feet. Corbins model used a scale
sergejj [24]

Answer: 6.04 inches


Step-by-step explanation:

Given: The actual height of the monument = 604 feet

The scale used by Corbins  is 1 inch = 100 feet

It implies in Corbins model 1 feet =\frac{1}{100}\ inches

Therefore, The height of the Corbins model in inches= \frac{604}{100}=6.04\ inches

Hence, the height of the Corbins model in inches= 6.04 inches

8 0
4 years ago
Angle C is an inscribed angle of circle P. Angle C measure (5x-7) and arc AB measure (2x). Find X
Andrei [34K]

Answer:

Step-by-step explanation:

Assuming that arc AB is where the inscribed angle meets the outside of the circle, then the rule is that the inscribed angle is 1/2 of the measure of its intercepted arc.  For us,

5x-7=\frac{1}{2}(2x)

Solving for x:

2(5x - 7) = 2x so

10x - 14 = 2x and

8x = 14 so

x = 1.75

7 0
4 years ago
Nikki bought 4 movies for $5 each. How much did she spend total?
Svetlanka [38]
$20 dollars add 5up 4times
3 0
3 years ago
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If the quotient of 3/4 and 1/2 is subtracted from the product of 1 4/5 and 2 1/7 what is the difference? Write the solutions as
ICE Princess25 [194]

Answer:

2 5/14

Step-by-step explanation:

Quotient of ¾ and ½:

¾ ÷ ½ = ¾ × 2 = 3/2

1 ⅘ = 9/5

2 1/7 = 15/7

Their product: 9/5 × 15/7 = 27/7

Difference:

27/7 - 3/2

Lcm: 14

[2(27) - 7(3)]/14

(54-21)/14

33/14

2 5/14

5 0
3 years ago
Let n =21. What is the value of n + 10?
Sergio039 [100]
I think it is 21+10=31...
3 0
4 years ago
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