3 years ago

Can someone please help me? Please

Mathematics

2 answers:

zepelin [54]3 years ago

7 0

Answer:

I did it,please check.

Step-by-step explanation:

swat323 years ago

5 0

Answer:

download connects and photo math

Step-by-step explanation:

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Create a few expressions of your own to demonstrate not only your understanding of the distributive property but also the powers

DanielleElmas [232]

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10² = 100

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3 years ago

If 0°<0<90° and sin0=12/13, find cos0 using trigonometric identities.

Aleks04 [339]

here's the solution,

we know :

$\sin( \theta) = \dfrac{perpendicular}{hypotenuse}$

So,

$\dfrac{p}{h} = \dfrac{12}{13}$

so.. let the perpendicular be 12x and hypotenuse be 13x

now,

by applying pythagoras theorem,

$b {}^{2} = h {}^{2} - p {}^{2}$

where,

b = base
h = hypotenuse
p = perpendicular

So,

$b {}^{2} = ({13x})^{2} - ({12x})^{2}$
$b {}^{2} = 169x {}^{2} - 144x {}^{2}$
${b}^{2} = 25x {}^{2}$
$b = 5x$

so,

$\cos( \theta) = \dfrac{b}{h}$

$\cos( \theta) = \dfrac{5x}{13x}$

$\cos( \theta) = \dfrac{5}{13}$

hope it helps !!

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3 years ago

Which of the following sets are closed under subtraction? Select all that apply.

Vanyuwa [196]

only integers and polynomials are under subtraction.

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3 years ago

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2x(x-1) as a product and as a sum.

cupoosta [38]

2x (x -1)

= (2x)(x+ -1)

= (2x(x) + (2x)(-1)

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