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kap26 [50]
3 years ago
13

Is the work shown correct? Explain your answer.

Mathematics
1 answer:
Vikentia [17]3 years ago
8 0
(11+2|)-(3-10|) 

11+2|-(3-10|)
 

11+2|-3+10|
 

(11-3)+(2|+10|) 

8+12|

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A rowing team rowed 90 miles while going with the current in the same amount of time as it took to row 10 miles going against th
pishuonlain [190]

Answer:

The speed in still water is 5 miles per hour.

Step-by-step explanation:

distance with current = 90 miles

distance against current = 10 miles

speed in still water = s

speed of current = 4 mph

speed with current = s + 4

speed against current = s - 4

time = t

speed = distance/time

distance = speed * time

With current:

90 = (s + 4) * t

Against the current:

10 = (s - 4) * t

We have a system of equations:

90 = (s + 4) * t

10 = (s - 4) * t

90 = ts + 4t

10 = ts - 4t

Subtract the second equation from the first equation.

80 = 8t

10 = t

t = 10

10 = t(s - 4)

10 = 10(s - 4)

1 = s - 4

s = 5

Answer: The speed in still water is 5 miles per hour.

8 0
2 years ago
Which traingle are congruent by asa
hjlf
Im pretty sure that the answer is B.
3 0
3 years ago
Quadrilateral ABCD is a rectangle. BD = 6x - 14 and AC = 8x - 20. What is BD?
BigorU [14]

Answer:

4

Step-by-step explanation:

The diagonals are equal length:

6x - 14 = 8x - 20\\-2x = -6\\x = 3

BD = 6x - 14\\BD = 6 * 3 - 14\\BD = 18 - 14\\BD = 4

8 0
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Please help me. What is the y intercept of the graph shown below?
natta225 [31]

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Step-by-step explanation:

the point where Oy intercepts the graph has x=0 and y= f(0)

so this is (0,2)

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X^2+2x+9=(x+1)^2+n What is n? ​
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