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expeople1 [14]
3 years ago
7

Marco and Drew stacked boxes on a shelf. Marco lifted 9 boxes of equal weight. Drew lifted 14 boxes, but Drew's boxes of equal w

eight, but Drew's boxes each weighed 8 lb less than Nathan's boxes.
Together, they lifted a total of 233 pounds.

What was the weight of one of Marco's boxes?


5 lb

8 lb

10 lb

15 lb
Mathematics
1 answer:
elixir [45]3 years ago
6 0

Answer:

Marco's boxes weigh 15 lbs.

Step-by-step explanation:

9x + 14(x - 8) = 233

9x + 14x - 112 = 233

23x = 345

x = 15

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Answer:

{( \cos2A -  \cos2B)  }^{2}  +  {( \sin2A +  \sin2 B  }^{2}\\    =  ( - 2\cos2A \cos2B  +  { \cos {}^{2} 2A } +  \cos {}^{2} 2B) + (2 \sin2A \sin2B +  \sin {}^{2} 2A +  \sin {}^{2} 2B)\\  \\  { =  - 2(  \sin2A +  \sin 2 B -  \cos2 A -  \cos2B) }\\  \\ { = -  2( - 4 \sin( A + B) \cos(A + B) } \\  \\  =    {\tt{double \: angle \: of \: sine}}\\  \\ { = 2 \times 2(2 \sin (A + B) \cos(A + B)) }\\  \\  { = 4 \sin2(A + B)}

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For homework, Brooke has 15 math problems, 5 social studies problems, and 9 science problems. Use mental math to determine how m
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Addition

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3 years ago
I need help please help me :(
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Step-by-step explanation:

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A hyperbola is formed
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21. Mickey earned $475 from mowing lawns last summer. He deposited this money in an
Dennis_Churaev [7]

Answer:

first, u need to know the formula for compound interest, which is:

A = P(1 + \frac{r}{100})^{n}

where A is the final amount

P- initial amount

r- percent compounded(interest)

and

n- number of years

so

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