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evablogger [386]
2 years ago
12

Angles A and B are complementary. If cos A = 7x − 9 and sin B = 4x + 15, what is the value of x?

Mathematics
1 answer:
Karo-lina-s [1.5K]2 years ago
5 0

The value of x according to the described angles is; 8

<h3>Complementary angles</h3>

If two angles A and B are complementary, it follows that A + B = 90 and Cos A = Sin B.

From the statement above, it follows that;

  • 4x + 15 = 7x -9

Collect like terms;

  • 15 +9 = 7x - 4x

  • 3x = 24

Divide both sides by 3;

x = 24/3 = 8.

Read more on complementary angles;

brainly.com/question/16281260

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Victor always runs out of money by the end of the month, so he wants to start keeping a budget. Last month, he spent a total of
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Answer:

Yearly budget= $3840

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Step-by-step explanation:

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4 0
3 years ago
73km 47hm 2dam - 11km 55hm
zvonat [6]

<u>Answer</u>

6,122 hm


<u>Explanation</u>

You can carry out operations on the like terms only. So convert all units to one unit.

I will convert them to dam

1 km =100 dam

73 km = 73 × 100

          =7,300 dam

11 km = 11× 100

         1100 dam

1 hm = 10 dam

47 hm = 47 × 10

            = 470 dam

55 hm = 55× 10

           = 550 dam

73km 47hm 2dam - 11km 55hm = (7300+ 470+2) - (1100+550)

                                                    = 7,772 - 1,650

                                                    = 6,122 hm


8 0
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