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yawa3891 [41]
2 years ago
8

Prove cos a = 5/13 pls solve it and no link pls..........​

Mathematics
1 answer:
Scorpion4ik [409]2 years ago
3 0

<u>Answer</u> : The demonstration is below :)

Step-by-step explanation :

<u>We use Pythagoras' </u><u>theorem </u><u>:</u>

  • In the triangle ABC we have :

AB² = AC² - BC² = 15² - 9² = 144 = 12²

  • In the triangle ABD we have :

DB² = AD² - AB² = 13² - 12² = 5²

cos(a) = BD/AD = 5/13

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solniwko [45]
The answer would be 90
8 0
3 years ago
What is the linear equation for 3x+2y=62
scZoUnD [109]
<span>In this formula :

</span><span>y </span>tells us how far up the line goes
<span>x </span>tells us how far along
<span>m </span>is the Slope or Gradient i.e. how steep the line is
<span>b </span>is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the<span> line properties.</span><span> We shall now graph the line </span><span> 3x+2y-62  = 0</span><span> and calculate its properties
</span>

Notice that when x = 0 the value of y is 31/1 so this line "cuts" the y axis at y=31.00000

<span>  y-intercept = 62/2 = 31
</span>

When y = 0 the value of x is 62/3 Our line therefore "cuts" the x axis at x=20.66667

<span>  x-intercept = 62/3 = 20.66667

</span>

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is 31.000 and for x=2.000, the value of y is 28.000. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of 28.000 - 31.000 = -3.000 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

<span>  Slope = -3.000/2.000 = -1.500

</span><span>
1.Slope = -3.000/2.000 = -1.500 

2.x-intercept = 62/3 = 20.66667<span> 

3.y-intercept = 62/2 = 31


I got sources from a few websites so excuse if something is weird/wrong.  
</span></span>
4 0
3 years ago
In which number is the digit 3 one hundred times greater than the digit three in the number 2,435
ozzi

Answer:

3000

Step-by-step explanation:

8 0
3 years ago
URGENT PLEASE HELP Select the correct solution set. x + 17 ≤ -3 {x | x ≤ -20} {x | x ≤ 14} {x | x ≥ -20}
grigory [225]

Answer:

The correct answer is the first solution set.

Step-by-step explanation:

If we substitute -20 into the equation we get

-20+17≤-3

-3≤-3

So,the inequality is right.

We can check the second one

14+17≤-3

31≤3 The inequality is false.

We can check the last one

-20+17≤-3

-3≤3 It works however there is a difference between the first one and the last one and that is the sign.For the first one there x≤-20 meaning the greatest number x can be is -20.For the last one x≥-20 which means -20 is the least value x can be.

If we substitude -21 into the equation we get

-21+17≤-3

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The inequality is false because -4 is not smaller than -3.

So,the right answer is the first solution set.

7 0
3 years ago
What’s the LCM of 6 and 9
Alexandra [31]

Answer:

Step-by-step explanation:

The answer is 18

8 0
3 years ago
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