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3 years ago

How many ears do twelve dogs have

Mathematics

1 answer:

Schach [20]3 years ago

5 0

Answer:24

Step-by-step explanation:

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Tan9°. tan27°. tan45°. tan72°. tan81°= 1 could u plz solve it with clear process

Inga [223]

Correct question:-

Prove that tan9.tan17.tan45.tan73.tan81=1

LHS

$\\ \sf\longmapsto tan9.tan17.tan45.tan73.tan81$

$\\ \sf\longmapsto tan9.tan81.tan17.tan73.tan45$

$\\ \sf\longmapsto tan(90-81).tan81.tan(90-73).tan73.1$

$\\ \sf\longmapsto cot81.tan81.cot73.tan73$

$\\ \sf\longmapsto 1.1$

$\\ \sf\longmapsto 1$

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2 years ago

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Write as an expression and simplify: the tripled product of 6a and b^2

klasskru [66]

Answer:

(6ab^2)^3

Step-by-step explanation:

3 0

3 years ago

Will give brainiest to correct answer 2(z+4)

wolverine [178]

Answer:

i think its like 2z+8

Step-by-step explanation:

5 0

3 years ago

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Use the Quadratic Formula to find the exact solutions of x2 + 7x - 4 = 0.

sladkih [1.3K]

Answer:

The solution of equation $x^2+7x-4=0$ is 0.53,-7.53.

Step-by-step explanation:

Given : Quadratic equation $x^2+7x-4=0$

To find : The solution of equation ?

Solution :

The solution of the quadratic equation $ax^2+bx+c=0$ is $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Here, a=1, b=7 and c=-4.

Substitute the values,

$x=\frac{-7\pm\sqrt{7^2-4(1)(-4)}}{2(1)}$

$x=\frac{-7\pm\sqrt{65}}{2}$

$x=\frac{-7+\sqrt{65}}{2},\frac{-7-\sqrt{65}}{2}$

$x=0.53,-7.53$

Therefore, the solution of equation $x^2+7x-4=0$ is 0.53,-7.53.

3 0

3 years ago

Multiply (7x – 6)(8x +3). A. 56x 2 – 27x – 18 B. 12x 2 – 50x + 8 C. 56x 2 – 18 D. 56x 2 – 69x + 18

mestny [16]

(7x-6)(8x+3)

Use the FOIL method

F: 7x • 8x = 56x^2
O: 7x • 3 = 21x
I: -6 • 8x = -48x
L: -6 • 3 = -18

$56x^{2}+21x-48x-18$

Simplify
$56x^{2}-27x-18$

Your answer is A.

7 0

3 years ago