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Lorico [155]
3 years ago
6

In Example 3, the track has 6 lanes that are each 1 meter in width. a. What is the outer perimeter of the track? Round your answ

er to the nearest meter. The outer perimeter is about meters.
Mathematics
1 answer:
noname [10]3 years ago
6 0

Answer: 6 meters

Step-by-step explanation:

Perimeter is the distance around the track.

There are 6 lanes in this track and each of those lanes are 1 meter in width.

The perimeter must be the total of the widths of all these lanes added together:

= 6 lanes * 1

= 6 meters

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What is the value of 5n-3 when n=5?
joja [24]

Answer:

22

Step-by-step explanation:

We are given the expression:—

\displaystyle \large{5n-3}

When n = 5, substitute/change n to 5:—

\displaystyle \large{5(5)-3}

Evaluate:—

\displaystyle \large{25-3=\boxed{22}}

__________________________________________________________

<u>Summary</u>

  <u>Substitution</u>

Changing or replacing from a term to another terms/expression is called substitution.

Examples:—

If we are given the expression \displaystyle \large{2y-1} and we want to find the value when y = 4, simply replace y-term to 4.

\displaystyle \large{2(4)-1=8-1=\boxed{7}}

__________________________________________________________

If you have any doubts regarding my answer/explanation, do not hesitate to ask in comment!

8 0
2 years ago
Help me pls!! thanks &lt;3
Softa [21]

Answer:

It is graph A

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Question 1 <br> Convert from parametric to rectangular:<br> x=t+4, y = t^2
vampirchik [111]

Answer:

  y = x^2 +8x +16

Step-by-step explanation:

t can be written in terms of x, then substituted into the equation for y.

  x = t -4

  x + 4 = t

  y = t^2 = (x +4)^2

  y = x^2 +8x +16

5 0
3 years ago
Question
goblinko [34]

Answer:

I couldn't really see the height number (that had to doubled) ir really the radius but I saw 7 for the radius and 3 (×2) for the height so I did the math and the answer is 923.63

Step-by-step explanation:

i could be wrong tho, hope this helped

5 0
2 years ago
Read 2 more answers
Some of the steps in the derivation of the quadratic formula are shown. Step 4: StartFraction negative 4 a c + b squared Over 4
s344n2d4d5 [400]

The reason why we used plus or minus when taking the square root is because; The square root of terms separated by addition and subtraction cannot be calculated individually.

<h3>How to use the quadratic formula?</h3>

The general formula for a quadratic equation is;

ax² + bx + c = 0

Now, the steps to derive quadratic formula to find the roots of this equation are as follows;

Step 1; Divide both sides of the equation by a to get;

x² + (b/a)x + c/a = 0

Step 2; Transpose the quantity c/a to the right side of the equation to get; x² + (b/a)x =  -c/a

Step 3; Complete the square by adding b²/4a² to both sides of the equation to get; x² + (b/a)x + b²/4a² =  -c/a + b²/4a²

Step 4; Factor the left side and combine the right side to get;

(x + (b/2a))² = (b² - 4ac)/(4a²)

Step 5:  Extract the square-root of both sides of the equation to get;

x + (b/2a) = ±(√(b² - 4ac))/2a

The reason why we used plus or minus when taking the square root is because The square root of terms separated by addition and subtraction cannot be calculated individually.

Read more about Quadratic Formula at; brainly.com/question/8649555

#SPJ1

4 0
2 years ago
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