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3 years ago

PLEASE SOMEONE ANSWER THIS !!

Mathematics

1 answer:

tatyana61 [14]3 years ago

6 0

Answer: Reflection over the y-axis, move down 5, move left 3

Step-by-step explanation:

Hope it helps :)

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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

3 years ago

How do you solve 3x+7=x

vredina [299]

3x + 7 = x

First, subtract 3x from both sides. / Your problem should look like: 7 = x - 3x
Second, simplify x - 3x to -2x. / Your problem should look like: 7 = -2x
Third, divide both sides by -2. / Your problem should look like: $\frac{7}{-2}$ = x
Fourth, simplify $\frac{7}{-2}$ to $-\frac{7}{2}$ / Your problem should look like: $- \frac{7}{2}$ = x
Fifth, switch sides. / Your problem should look like: x = $-\frac{7}{2}$

Answer as fraction: $-\frac{7}{2}$
Answer as decimal: -3.5

8 0

3 years ago

Read 2 more answers

Evaluate the following expression at x = -4<br> -5x-1

ANTONII [103]

All u have to do is 20-1=19

3 0

3 years ago

Read 2 more answers

How many bit strings of length 12 contain exactly three "1s"

Inessa [10]

There are $\dbinom{12}3=220$ such strings, provided that the ordering of the bits doesn't matter.