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xxTIMURxx [149]
2 years ago
8

Find the product of (x + 5)(x − 5).

Mathematics
2 answers:
Alexandra [31]2 years ago
8 0

Answer:

x^2 − 25

Step-by-step explanation:

(x + 5)(x − 5)

which is then

x(x − 5) and 5(x − 5)

= x^2 -5x + 5x - 25

-5x and 5x cancel each other out, so you're left with

x^2 − 25

velikii [3]2 years ago
7 0

Multiply the two brackets together

(x+5)(x-5)

(x)(x)(-5)(x)(+5)(x)(5)(-5)

x^2-5x+5x-25

x^2-25

Answer: x^2-25 ( third choice)

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tatuchka [14]

Answer:

(2,6) or x = 2, y = 6

Step-by-step explanation:

6 0
2 years ago
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This shape is made of three identical semicircles.
Yuliya22 [10]

Answer:

48cm

Step-by-step explanation:

The perimeter of first shape is 36cm. There are 3 semi circle (curves).

Therefore,

3 curves of semicircle (arc length) = 36

1 curve of semicircle (arc length) = 36/3

= 12cm

In picture 2,

4 semicircles (They've mentioned that they used the same semicircle for the 2nd shape also)

So,

4×12 = 48cm

8 0
2 years ago
Sarah sights the top of the statue of the liberty at an angle of elevation of 61 degrees. If Sarah is 5.5 feet tall and is stand
Goryan [66]
Angle of elevation= 61°
Height of Sarah =h = 5.5ft
Distance(from base of statue) between Sarah and statue = 166 ft 
Now,
tan(61°)= H/166 
H= 299.47 ft
but in the height H you also add the height of of Sarah then you get the height of statue.
Height of <span>statue of the liberty = H+h
                                               = 299.47+5.5
                                               = 304.97 ft</span>

7 0
3 years ago
i need help with this one Eight cookies cost $12. At this rate, how much will 10 cookies cost? soory i didnt see the answer
WARRIOR [948]

Answer: $15

Step-by-step explanation:

8 cookies cost $12 you divide 12 by 8 and then you get 1.5 which equals 1.50 so each cookie is 1.50. So for 10 cookies you multiply 10 times 1.50 and you get your answer $15. 10 cookies cost $15

3 0
2 years ago
A circle has the circumference of 3.75 in. What is the diameter of the circle? (Use 3.14 for p. Round to the nearest tenth.) a.
HACTEHA [7]

Answer:

<h2>b. 1.2 in</h2>

Step-by-step explanation:

The formula of a circumference:

C=d\pi

<em>d</em> - diameter

We have <em>C = 3.75 in</em><em>.</em>

Substitute:

d\pi=3.75\qquad\text{use}\ \pi\approx3.14\\\\3.14d=3.75\qquad\text{divide both sides by 3.14}\\\\d=\dfrac{3.75}{3.14}\\\\d=\dfrac{375}{314}\\\\d\approx1.2\ in

7 0
2 years ago
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