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3 years ago

One lap around an indoor track is 0.15 mile. Brett runs 9 laps around the track. What is the total distance Brett runs?

2 answers:

5 0

The answer is 1.35 because one lap around the track is 0.15 miles so if Brett runs around the track 9 time then you would multiply 0.15 x 9 that equals 1.35

Ket [755]3 years ago

4 0

Answer: Brett runs for 1.35 miles in total

Step-by-step explanation:

1 4

0.15

x 9

———

1 .35

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A path 1 m wide is build around a garden that is a 30-meter square. What is the area taken by the path?

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Length of outer boundary =30m

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2 years ago

Solve the system of equations by using substitution.<br> x+8y=-2<br> x-3y=20

zysi [14]

Answer:

(14, -2)

Step-by-step explanation:

To solve by using substitution, begin by solving for a variable in the first equation. Let's solve for x:

$x+8y=-2\\x=-2-8y$

Now we know what <em>x</em> equals. Let's substitute this into the second equation:

$x-3y=20\\(-2-8y)-3y=20$

We can then simplify:

$-2-8y-3y=20$ Given equation

$-2-11y=20$ Combine y terms

$-11y=22$ Add 2

$y=-2$ Divide by -11

So, we now know the value of y = -2.

To find the value of X, we can substitute the value of Y into one of the equations. Let's use the first one:

$x+8y=-2$

$x+8(-2)=-2$ Substitute for y

$x-16=-2$ Distribute 8

$x=14$ Add 16

So, we now know the value of x = 14.

Therefore, we know a solution to the system of equations is (14, -2).

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3 years ago