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Svetlanka [38]
1 year ago
5

A moto maintained a constant speed of 13 miles per hour relative to the water in going 25 miles upstream and then returning. The

total time for the tip was 26.0 hours. Use this information to find the speed
of the current
Mathematics
1 answer:
MrRa [10]1 year ago
8 0

Answer:

current speed = 12 mph

Step-by-step explanation:

distance / rate = time

time upstream + time downstream = 26    

25 / (13-c)         +      25 / (13+c)         = 26         ( c = current speed)

solve for c = 12 mi/hr

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M2 = 272 182 – 2(27)(18)cos(28°) m2 = 729 324 – (972)cos(28°) m2 = 1053 – (972)cos(28°) to the nearest whole number, the value o
RideAnS [48]
M2= 2272134.32...2272134    
m2= 728465.7749 ...728466
m2= 194.7749...m2= 195.





8 0
3 years ago
Which expression is equivalent to ( 4mn / m^-2n^6)^-2
inn [45]

Here are a few rules with exponents that apply here:

  1. Raising a power to a power: (x^m)^n=x^{m*n}
  2. Dividing exponents of the same base: \frac{x^m}{x^n}=x^{m-n}
  3. Converting negative exponents to positive ones: x^{-m}=\frac{1}{x^m}\ \textsf{and}\ \frac{1}{x^{-m}}=x^m

Firstly, solve the outer exponent:

(\frac{4mn}{m^{-2}n^{6}})^{-2}=\frac{4^{-2}m^{-2}n^{-2}}{m^{-2*-2}n^{6*-2}}=\frac{4^{-2}m^{-2}n^{-2}}{m^4n^{-12}}

Next, divide:

\frac{4^{-2}m^{-2}n^{-2}}{m^4n^{-12}}=4^{-2}m^{-2-4}n^{-2-(-12)}=4^{-2}m^{-6}n^{10}

Next, convert the negative exponents:

4^{-2}m^{-6}n^{10}=\frac{n^{10}}{4^2m^6}=\frac{n^{10}}{16m^6}

<u>Your final answer is n^10/16m^6 , or B.</u>

8 0
3 years ago
What is the value of 1/2 x power of 3 + 5.3y, when x = 2 and y = 3? (1 point)
sleet_krkn [62]
1/2 (2) + 3 + 5.3 (3)
1 + 3 + 15.9
19.9
6 0
3 years ago
Read 2 more answers
Suppose B is a proper subset of C,
Tomtit [17]

Answer:

Maximum: 7

Minimum: 0

Step-by-step explanation:

A proper subset B of a set C, denoted B\subset C, is a subset that is strictly contained in C and so necessarily excludes at least one member of C.

This means that the number of elements in B must be at least 1 less than the number of elements in C. If the number of elements in C is 8, then the maximum number of elements in B can be 7.

The empty set is a proper subset of any nonempty set. Hence, the minimum number of elements in B can be 0.

3 0
3 years ago
Please assist me with this problem
Anna11 [10]

Answer:

Option B is not a justification

Step-by-step explanation:

Option A is a justification (to get two pair of similar triangles (ABC-ACD) and (ABC-BCD))

Option C is a justification (a^2 = cy, b^2 = cx, a^2 + b^2 = cy + cx)

Option D is a justification (a^2 + b^2 = cy + cx = c(y + x) = c^2)

=> Option B is not a justification

8 0
3 years ago
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