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miss Akunina [59]
3 years ago
15

Simplify (-3/5) ÷ (7/6). A. -7/10 B. -18/35 C. 18/35 D 7/10

Mathematics
1 answer:
docker41 [41]3 years ago
5 0
The answer would be B. You would need to keep the first fraction, change to multiplication, and flip the second fraction and multiply across.

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For the pair of points find the distance between them and the midpoint of the line segment joining them.(720,50), (125,18)The di
Lana71 [14]

Given two points

(x_1,y_1)

and

(x_2,y_2)

The distance between them is >>>

D=\sqrt[]{(y_2-y_1)^2+(x_2-x_1)^2}

The points given are (Sqrt(20), Sqrt(50)) and (Sqrt(125), Sqrt(8)), so their distance is >>>

\begin{gathered} D=\sqrt[]{(y_2-y_1)^2+(x_2-x_1)^2} \\ D=\sqrt[]{(\sqrt[]{8}-\sqrt[]{50})^2+(\sqrt[]{125}-\sqrt[]{20})^2} \\ D=\sqrt[]{(\sqrt8)^2-2(\sqrt[]{8})(\sqrt[]{50})+(\sqrt[]{50})^2^{}+(\sqrt[]{125})^2-2(\sqrt[]{125})(\sqrt[]{20})+(\sqrt[]{20})^2} \\ D=\sqrt[]{8-2(2\sqrt[]{2})(5\sqrt[]{2})+50+125-2(5\sqrt[]{5})(2\sqrt[]{5})+20} \\ D=\sqrt[]{8-40+50+125-100+20} \\ D=\sqrt[]{63} \\ D=3\sqrt[]{7} \end{gathered}

----------------------------------------------------------------------------------------------------------

The midpoint formula is >>>

M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2})

Plugging in the points, we have >>>

\begin{gathered} M=(\frac{x_1+x_2}{2},\frac{y_1+y_2}{2}) \\ M=(\frac{\sqrt[]{20}+\sqrt[]{125}}{2},\frac{\sqrt[]{50}+\sqrt[]{8}}{2}) \\ M=(\frac{2\sqrt5+5\sqrt[]{5}}{2},\frac{5\sqrt[]{2}+2\sqrt[]{2}}{2}) \\ M=(\frac{7\sqrt[]{5}}{2},\frac{7\sqrt[]{2}}{2}) \end{gathered}

3 0
2 years ago
Andy solve an equation as shown below. What error did Andy make?
bixtya [17]

Answer:

Step-by-step explanation:

Whatever you do to the left you must do to the right, he multiplied 12 but forgot to multiply the -4 on the left and the + 1 on the right by the number 12

3 0
3 years ago
The least squares method is a mathematical procedure used to identify the linear equation that best fits a set of ordered pairs.
levacccp [35]
This is true, answer a.
8 0
3 years ago
At 12 am, train A sets off due west at a fixed speed of s mph. Train B sets off due east from the same station 2 hours later tra
alexgriva [62]

Answer: 20.833mph.

Step-by-step explanation:

Using the motion Formula,

speed = distance/time.

This means:

distance = speed * time.

To find the value of "s" in the question, we have to calculate the distance both trains travelled in terms of "s" and sum it to give us 300miles.

For train A,

Speed = S miles per hour

time taken to reach current position= 7hours.

Hence, the distance travelled by train A

Distance A = 7s.

For train B,

Speed= (S + 10)miles per hour.

time taken to reach current position= 5hours (since train B left two hours after the departure of train A)

Distance = speed * time

Distance B = (S + 10) * 5

Distance B = 5s + 50.

Hence, adding both distance to sum up to 300miles, it becomes:

300 = 7s + 5s + 50

300-50 = 12s

250 = 12s

s = 20.833mph.

8 0
3 years ago
Kaylin ate 2/6 of a pizza and Davis ate 2/8 of the same pizza. Davis told Kaylin half of the pizza had been left for later. Is D
svlad2 [7]

Answer:

No. There would be less then half left

Step-by-step explanation:

7 0
3 years ago
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