7a+5=61 what is a in the equation
2 answers:
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Answer:
881.5 meters.
Step-by-step explanation:
The horizontal plane at the level of wai-kin's eyes divide the height of the cliff into two parts. Let the upper part be represented by x and the lower part be represented by y.
The height of the cliff = x + y
Applying the appropriate trigonometry functions.
To determine the value of x;
Tan θ =
Tan =
⇒ x = 490 x Tan
= 490 x 0.7265
= 355.985
x = 356 meters
To determine the value of y;
Tan θ =
Tan =
⇒ y = 490 x Tan
= 490 x 1.0724
= 525.476
y = 525.5 meters
Therefore,
The height of the cliff = x + y
= 355.985 + 525.476
= 881.461
The height of the cliff is 881.5 meters.
Answer:
is the fraction of 8th graders who are boys.
Step-by-step explanation:
Let total number of 8th graders =
Given that, of 8th graders play sports
8th graders who play sports =
Also, Given that, of 8th graders that play sports are boys
Number of 8th graders that play sports, and are boys =
Hence, the answer is:
is the fraction of 8th graders who are boys.