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2 years ago

10

The outside of a closed glass display case measures 22" x 15" x 12". The glass is half inch thick. How much air is contained in

the case

1 answer:

Reptile [31]2 years ago

7 0

1980 is how much air is in the case

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Tan x = sin x / cos x , therefore tan (90-A) = ? . (All angle measurements are in degrees)

Anna11 [10]

Answer:

Option D. $\frac{1}{tanA}$

Step-by-step explanation:

tan ( 90-A ) = $\frac{sin(90-A)}{cos(90-A)}$

since sin (90-A) = cos A

and cos (90-A) = sin A

So $\frac{sin(90-A)}{cos(90-A)}=\frac{CosA}{SinA}=cot A=\frac{1}{tanA}$

Option D. $\frac{1}{tanA}$ is the correct answer.

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2 years ago

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Given: BE bisects AD at C, AB ⊥ BC , DE ⊥ EC, AB ≅ DE Prove: ABC ≅DEC

faltersainse [42]

Answer:

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Step-by-step explanation:

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2 years ago

A line passes through the point (-9, -3) and has a slope of 2.

tresset_1 [31]

Answer:

Step-by-step explanation:

hello :

note :

Use the point-slope formula.

y - y_1 = m(x - x_1) when : x_1= -9 y_1= -3

m= 2 (the slope)

an equation in the point-slope form is : y +3 = 2(x+9)

means : y+3 =2x +18

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1 year ago

Please can you help me with this perpendicular line question?

kirill [66]

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2 years ago

X2 + 2y ÷ w + 3z for w = 2, x = 5, y = 8, and z = 3?

melisa1 [442]

Step-by-step explanation:

w = 2

x = 5

y = 8

z = 3

= x² + 2y ÷ w + 3z

= (5)² + 2(8) ÷ (2) + 3(3)

= 25 + 16 ÷ 2 + 9

= 25 + 8 + 9

= 42

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2 years ago