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Anna71 [15]
3 years ago
5

Hewp:(

Mathematics
2 answers:
stira [4]3 years ago
7 0

Answer:

210

Step-by-step explanation:

Using compatible numbers, which is the best estimate of (28.5)(7.1)?

JulsSmile [24]3 years ago
4 0

Answer:

300 i did 210 and got it wrong

Step-by-step explanation:

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Answer:

To calculate 25 percent of a number, simply divide it by 4. For example, 25 percent of 12 is 12 divided by 4, or 3. 10 percent means one tenth. To calculate 10 percent of a number, simply divide it by 10 or move the decimal point one place to the left.

Step-by-step explanation:

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A helicopter hovers at an altitude that is 1000 feet above a mountain of altitude 5210 feet. A second, taller peak is viewed fro
ehidna [41]
Given: 

Height of Mountain A = 5210 feet
Distance of Mountain A from a helicopter above the peak = 1000 feet
Angle of depression:
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 First, draw an illustration and label the enumerated given values.

Observe that there are two right triangles formed:

From the triangle formed by the helicopter and Mountain B, 

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cos (43) = y / h

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6 0
3 years ago
The sum of two numbers is 54 . the smaller number is 12 less than the larger number. what are the numbers?
Andreas93 [3]
<span>Let x=one number and x+12= the other number.  Together the numbers=54.  Set up the equation:  x+x+12=54;  Combine the variables;  2x+12=54;  Subtract 12 from both sides of the equation;  2x=42; Divide both sides of the equation by 2;  x=21 is one number and 21+12=33 is the other number.  Check:  2(21) +12=54;  42+12=54;  54=54.</span>
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