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Lelu [443]
2 years ago
7

I WILL GIVE BRAINIEST

Mathematics
2 answers:
a_sh-v [17]2 years ago
7 0
Expand the bracket firsr by multiplying everything in the bracket by - 5 and you now have 3-10x-5<10, which simplifies to -2-10x<10
Bring - 2 over to the other side by adding 2 on both sides and now you have -10x<12. Now simply divide both sides by -10 to isolate x and you get x<-1.2, or x<-6/5 as a fraction
yaroslaw [1]2 years ago
3 0
3 - 5(2x + 1) ≤ 10
3 - 10x - 5 ≤ 10
-10x - 2 ≤ 10
       +2    +2
___________
   -10x ≤ 12
Divide -10 on both sides.
x ≤ 12/-10
 x ≤ -1.2
-1.2 into a fraction is -6/5.
x ≤ -1.2 or x ≤ -6/5


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Alinara [238K]

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Step-by-step explanation:

The two triangles in the diagram are:

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First we have to find the third side (hypotenuse) of BDC so that we can use it to find the value of x.

Hypotenuse is the largest side of a triangle which is usually in front of the right angle.

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Applying Pythagoras theorem:

(Hypotenuse)^2  = (Base)^2 + (Perpendicular)^2\\BC^2 = BD^2 + CD^2\\BC^2 = (10)^2 + (2\sqrt{11})^2\\BC^2 = 100+(2^2 * 11)\\BC^2 = 100+(4*11)\\BC^2 = 100+44\\BC^2 = 144\\\sqrt{BC^2} = \sqrt{144}\\BC = 12cm

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3 years ago
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xxMikexx [17]

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Step-by-step explanation:

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