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Anit [1.1K]
3 years ago
8

Evalute 2 (a - 5) + 2, if a = 15 O 14 0 27 O 22 07

Mathematics
2 answers:
SVETLANKA909090 [29]3 years ago
5 0

Answer:

22

Step-by-step explanation:

2 (a - 5) + 2

Let a = 15

2( 15-5) +2

2(10) +2

20+2

22

Mrac [35]3 years ago
4 0
I’m pretty sure it’s 22
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A straight angle.

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Find the value of y.<br> 24<br> 18<br> у<br> Answer:
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Find the equation of the line (0,-5) and (5,0)
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In ΔWXY, the measure of ∠Y=90°, XW = 53, YX = 28, and WY = 45. What is the value of the cosine of ∠X to the nearest hundredth?
kotegsom [21]

The value of ∠X = 58.11°, If ΔWXY, the measure of ∠Y=90°, XW = 53, YX = 28, and WY = 45.

Step-by-step explanation:

The given is,

                   In ΔWXY, ∠Y=90°

                        XW = 53

                         YX = 28

                        WY = 45

Step:1

             Ref the attachment,

             Given triangle XWY is right angled triangle.

             Trigonometric ratio's,

                              Cos ∅  = \frac{Adj}{Hyp}    

             For the given attachment, the trigonometric ratio becomes,

                              Cos ∅  = \frac{XY}{XW}.....................................(1)

             Let, ∠X = ∅

             Where, XY = 28

                         XW =  53

             Equation (1) becomes,

                                 Cos ∅  = \frac{28}{53}

                                 Cos ∅ = 0.5283

                                        ∅ = cos^{-1} (0.5283)

                                        ∅ = 58.109°

Result:

          The value of ∠X = 58.11°, If ΔWXY, the measure of ∠Y=90°, XW = 53, YX = 28, and WY = 45.

             

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