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3 years ago

Choose the ratio that is equivalent to this one: 10/9

Mathematics

2 answers:

denis-greek [22]3 years ago

7 0

Answer:

100/90 is equivalent

so is 90/81

Step-by-step explanation:

We know this because 10 x 10=100 and 9 x 10=90 we get 100/90

then 10 x 9= 90 then 9 x 9=81/ so 90/81 is equivalent as well

Burka [1]3 years ago

4 0

Answer:

20/18

Step-by-step explanation:

Multiply both terms by the same value and you get an equal ratio.

10*10

9*9

100/81 is a ratio equivalent to 10/9

Hope this helps!

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Help,anyone can help me do quetion.

3241004551 [841]

Answer:

(a) x = $128^{o}$

(b) x = $74^{o}$

Step-by-step explanation:

A. sum of angles in a polygon = (n - 2) 180

The polygon given is an irregular pentagon, where n = 5

So that;

sum of angles in a pentagon = (5 - 2) 180

= 3 x 180

= $540^{o}$

Thus,

x + 90 + 76 + 110 + 136 = $540^{o}$

x + 412 = $540^{o}$

x = $540^{o}$ - 412

x = $128^{o}$

B. The polygon given is an irregular pentagon, where n = 5.

Let the supplementary angle with angle 38 be represented by y,

y + 38 = 180

y = 180 - 38

= $142^{o}$

y = $142^{o}$

Let the supplementary angle with x be represented by z, so that;

z + 72 + 120 + 100 + 142 = $540^{o}$

z + 434 = $540^{o}$

z = $540^{o}$ - 434

= $106^{o}$

z = $106^{o}$

But, x + z = $180^{o}$

Then;

x + $106^{o}$ = $180^{o}$

x = $180^{o}$ - $106^{o}$

= $74^{o}$

x = $74^{o}$

7 0

3 years ago

A 9-pack of toaster pastries costs $3.60. What is the unit price?<br> per pastry

lina2011 [118]

Answer:.40 cents

Step-by-step explanation: divide the total cost by the amount of items you have.

7 0

3 years ago

A certain jet can reach an altitude of 8000 ft while flying 16000 ft through the air. what is the angle of the elevation that th

irina1246 [14]

Answer:

27 degrees

Step-by-step explanation:

First, we can draw this out. Since the altitude is 8000, we can make that the height, and it goes 16000 feet through the air, that can be the length. I have drawn this out, as shown in the image. Note that when drawing, because the airplane is going up and forward, that path should represent the hypotenuse. The angle of elevation is the angle connecting the length and the path, as shown by the angle x in the picture.

We know than tan(x) = opposite/adjacent, so tan(x) here = 8000/16000 = 1/2. Then, arctan(1/2) =x = 27 degrees