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Anon25 [30]
3 years ago
11

5. Melanie can run around the track 9 times

Mathematics
2 answers:
Archy [21]3 years ago
7 0
28/9=3.1111111111111 minutes per lap
At this rate she can do 24 75min/3.11111111111111111
Zina [86]3 years ago
3 0

Answer: 3.36

Step-by-step explanation: 75minutes / 28= 2.678571428571429

9/2.678571428571429=3.36 times

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If x + y =6, y +z = 7 and z + x =9, what is the average (arithmetic mean) of<br> x,y and z?
nadya68 [22]

Answer:

\frac{22}{3}

Step-by-step explanation:

x + y + y + z + z + x = 2x + 2y + 2z = 22

x + y + z = 22

22 ÷ 3 = \frac{22}{3}

8 0
3 years ago
One side of a rectangle is three times the other. Find the longer side if the perimeter is<br> 29
guajiro [1.7K]

Answer:

Answer: 10.875

Step-by-step explanation:

Let the short side be x.

Then the long side is 3x.

There are two opposite sides of each length, so the perimeter is

3x + 3x + x + x = 8x

The perimeter is 29, so we get the equation

8x = 29

Solve for x by dividing both sides by 8.

x = 29/8

x = 3.625

The longer side is 3x.

3x = 3(3.625) = 10.875

Answer: 10.875

3 0
3 years ago
Read 2 more answers
Solve.<br> y =-2x + 9<br> y =4x-3
sammy [17]

Answer:

X= 2 Y=5

Step-by-step explanation:

Set them equal

-2x+9=4x-3 add -2x to both sides and -3 to both sides

12=6x then divide by 6

x=2

plug in 2 to either equation and solve for Y.

Y=-2(2)+9

Y=5

5 0
2 years ago
Please help me with this ​
MissTica

Answer:

For the question on the right, I assume b is the exponential factor, or growth factor.

Step-by-step explanation:

Linear:

Y=aX + b\\(X, Y) = (0, 15) => b = 15\\(X,Y) = (1, 12) => a = -3\\Y = -3X + 15

You can find the equation by using two points and the equation for a line.

Exponential:

Y = a^{bX+c}\\(X, Y) = (0, 81) => a^{c} = 81 => a^{c} = 3^{4} => a=3, c=4\\(X, Y) = (1, 27) => a^{b+c} = 27 => a^{b}a^{c} = 27 => a^{b} = \frac{27}{81} = \frac{1}{3} => b=-1\\Y = 3^{-X+4}

6 0
2 years ago
What is the product of – 7.2 x -3?
IrinaK [193]
The answer would be -21.6
6 0
3 years ago
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