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asambeis [7]
3 years ago
13

Don't have clue how to do this...

Mathematics
1 answer:
Nimfa-mama [501]3 years ago
6 0
I hope this explains it

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Can someone help me solve (a) and (c) pls.<br>Thanks ​
Alex777 [14]

Answer:

Area of ABCD = 959.93 units²

Step-by-step explanation:

a). By applying Sine rule in the ΔABD,

  \frac{\text{SinA}}{46}=\frac{\text{Sin}\angle{DBA}}{35}

  \frac{\text{Sin110}}{46}=\frac{\text{Sin}\angle{DBA}}{35}

 Sin∠DBA = \frac{35\times \text{Sin}(110)}{46}

 m∠DBA = \text{Sin}^{-1}(0.714983)

 m∠DBA = 45.64°

 Therefore, m∠ADB = 180° - (110° + 45.64°) = 24.36°

                  m∠ADB = 24.36°

c). Area of ABCD = Area of ΔABD + Area of ΔBCD

  Area of ΔABD = AD×BD×Sin(\frac{24.36}{2})

                           = 35×46Sin(12.18)

                           = 339.68 units²

   Area of ΔBCD = BD×BC×Sin(\frac{59.92}{2})°

                            = 46×27×(0.4994)

                            = 620.25 units²

   Area of ABCD = 339.68 + 620.25

                            = 959.93 units²

8 0
4 years ago
Which statement correctly describes the expression (15)(-8)?
IrinaK [193]

Answer:

C

Step-by-step explanation:

NEGATIVE TIMES POSITIVE WILL GIVE A NEGATIVE PRODUCT

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If you use the midpoint formula which is [(X1+X2)/2,(Y1+Y2)/2], you will get your midpoint is [(a+b)/2,(b+c)/2]
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Eli practices for a piano recital 3 3 /4 hours in one week. In the same week, he practices basketball 1 2/ 3 hours. How much lon
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3 3/4 - 1 2/3=15/4 -5/3=45/12 - 20/12=25/12


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The solution is attached as a word file

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