1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aliya0001 [1]
3 years ago
5

Marcie ran the 400-meter race 3 times. her fastest time was 51.3 seconds. Her slowest time was 56.4 seconds. If Marcie's average

time was 53.4 seconds, what was her time for the third race?
Mathematics
1 answer:
Nata [24]3 years ago
6 0

Answer:

<em>52.5 Seconds</em>

<em></em>

Step-by-step explanation:

Let's call, her time for the third race, x.

To find the average (53.4), we add up all the values and then divide this total by the number of values.

So, we will set up our equation.

      56.4 + 51.3 + x

>    ------------------------ = 53.4

                3

To get rid of 3, we will multiply both sides by 3.

>   56.4 + 51.3 + x = 160.2

>   107.7 + x = 160.2

We will subtract 107.7 from both sides to isolate x.

<h2>> x = 52.5</h2><h2></h2><h3><em>I hope it will be understood.</em></h3><h3><em>If I have any inaccuracies please let me know.</em></h3><h3><em>Have a nice day and never stop questioning!</em></h3>
You might be interested in
Write <img src="https://tex.z-dn.net/?f=%28-%20x%5E%7B2%7D%29%20-4x%2B2" id="TexFormula1" title="(- x^{2}) -4x+2" alt="(- x^{2})
marin [14]
Because the coefficient of x^2 is -1, we know that a will be -1.  Knowing that the coefficient of x is -4, we can calculate that p=2.  Thus, we have -1(x+2)^2+q is our equation.  This is equal to -x^2-4x-4+q.  As the constant term must be 2, we can then see that q is 6.

As such, we have -1(x+2)^2+6=0 as our factorization.

To solve this equation, we can use the quadratic formula.  Plugging in values, we have:

\frac{4+-2 \sqrt{6} }{-2}
which is equal to: (when the fraction is simplified)
-2+- \sqrt{6}
7 0
3 years ago
1. f(x) = 3x – 2; f(4)??
netineya [11]

Answer:

the answer is 5

Step-by-step explanation:

f(4) = 3(4) -2

7 - 2 = 5

8 0
3 years ago
Read 2 more answers
Is 9/3 a whole number
Liono4ka [1.6K]

Yes! 3x3= 9. Therefore, 3 goes into nine 3 times. So the whole number would be 3.

6 0
3 years ago
Read 2 more answers
(3x - 2)³= <br>gives the solution pls.​
Nonamiya [84]

Answer:

27x^3 - 54x^2 + 36x - 8

Step-by-step explanation:

(3x - 2)^3

= (3x - 2) (3x - 2) (3x - 2)

= 27x^3 - 54x^2 + 36x - 8

Hope this helps :)

Let me know if there are any mistakes!!

5 0
3 years ago
Read 2 more answers
Find the length of the unknown side. Round your answer to the nearest whole number.
aleksley [76]
The answer is 72.8. in order to solve this problem, you need to use the pythagorean theorem. the equation is c^2-b^2=a^2.

75^2-18^2=a^2

75 squared minutes 18 squared is 5301. then you need to find the square root of 5301.

the square root of 5301 is 72.8079666, rounding to 72.8.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Question 1 Part A Ben has $172 to spend on a membership at the fitness club. How many months can Ben be a member of the fitness
    12·2 answers
  • Kai is making 3 batches of cookies. Each batch uses 1 3/4 cups of flour. How much flour does Kai need?
    15·2 answers
  • ....................................
    14·2 answers
  • Which best describes the relationship between the line that passes through the points (–6, 5) and (–2, 7) and the line that pass
    7·1 answer
  • Amanda solves the equation 6x+9=57. She gets the answer x=0.5. Do you agree with Amanda? Explain your answer.
    7·2 answers
  • A bag contains 10 marbles. Four of the marbles are purple. What is the probability you will choose a purple marble from the bag
    12·1 answer
  • Is x = 4 a solution to 2x - 6 + 4 = 14? Yes or no
    11·1 answer
  • Help? please lol<br> school is so confuesing
    8·1 answer
  • Scope of Organization behavior
    6·1 answer
  • IS THIS IN SIMPLIST FORM? PLEASE HELP! TY! <br><br> 2( x - 3 + 2 )
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!