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3 years ago

How do I solve this equation?

Mathematics

1 answer:

irakobra [83]3 years ago

4 0

if there is more than 1 x u add the exes but you dont add the exes with the other numbers so in this case you would do 7 x 2/3 and you would leave the x alone

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What's the volume of a triangular prism? (5cm, 8cm, 4cm)

german

The answer is 160/3 I think

8 0

3 years ago

Geometry Help!

Elina [12.6K]

Answer:

x = 88.76°

Step-by-step explanation:

<u>Use the law of cosines:</u>

cos C = (a² + b² - c²)/(2ab)

<u>Apply to the given triangle and solve for x:</u>

cos x = (52² + 48² - 70²)/(2*52*48)
cos x = 108/4992
cos x = 0.02163461538
x = arccos 0.02163461538
x = 88.76°

4 0

3 years ago

The triangles below are similar. Triangle A B C. Side A C is 10 and side A B is 5. Angle C is 30 degrees. Triangle D E F. Side E

Gnoma [55]

Answer:

$\triangle ABC {\displaystyle \sim } \triangle DE\ F$

$\triangle CBA {\displaystyle \sim } \triangle FED$

$\triangle BAC {\displaystyle \sim } \triangle EDF$

Step-by-step explanation:

Given

$\triangle ABC {\displaystyle \sim } \triangle DE\ F$

$AC = 10$

$AB = 5$

$\angle C = 30^\circ$

$ED = 7.5$

$DF = 25$

$\angle F =30$

$\angle E =90$

Required

Which of the options is/are true:

$\triangle CBA {\displaystyle \sim } \triangle FED$ $\triangle CBA {\displaystyle \sim } \triangle FDE$ $\triangle BAC {\displaystyle \sim } \triangle EFD$

$\triangle BAC {\displaystyle \sim } \triangle EDF$ $\triangle ABC {\displaystyle \sim } \triangle DE\ F$ $\triangle ABC {\displaystyle \sim } \triangle DFE$