Here are the marks of a student in four exams. 65 80 76 69 The student takes a fifth exam. His mean mark for the five exams is 70 Work out his mark in the fifth exam

Answers

Answer 1

Answer:

mark of the fifth exam = 60

Step-by-step explanation:

Mean = sum of all marks / number of exam

Mean = 70

Number of exam = 5

Let x =

Mean = sum of all marks / number of exam

70 = (65 + 80 + 76 + 69 + x) / 5

Cross product

70 × 5 = (290 + x)

350 = 290 + x

350 - 290 = x

x = 60

mark of the fifth exam = 60


Related Questions

Calculate the distance between the 2 points. A(-4, 3) and B(-7, 0)

Answers

Answer:

[tex]d=3\sqrt{2}[/tex]

Step-by-step explanation:

I applied the distance formula for this question:

[tex]d=\sqrt{3^{2}+3^{2} }\\d=\sqrt{18} \\[/tex]

[tex]d=3\sqrt{2}[/tex]

Answer:

how old are you? also are u a g or b?

Step-by-step explanation:

which is a factor pair of 72?

A) 12,6

B) 14,5

C)23,4

D)24,2

Answers

Answer:

the answer is A) 12,6. .

Step-by-step explanation:

.

Hi, im not sure on this wording, any help is appriciated.

Answers

Answer:

The second  terms isn't in the type factory

Step-by-step explanation:

The second term is not on the type factory

Find the area of the figure.
A. 50 ft^2
B. 41 ft^2
C. 42 ft^2
D. 38 ft^2

Answers

Answer:

I'm pretty sure its A

Step-by-step explanation:

Answer: The answer is 38ft^2

Step-by-step explanation:

3 x 10 = 30

6 - 10 = 4

5 - 3= 2

4 x 2 = 8

30 + 8= 38

Answer: 38ft^2

Find Percent of Change
1.) 200 to 500.
is the answer 40?
if not please explain...​

Answers

Answer: I think it is

Step-by-step explanation:

Answer:

150% increase

Step-by-step explanation:

Calculate percentage change

from V1 = 200 to V2 = 500

(V2−V1)|V1|×100

=(500−200)|200|×100

=300200×100

=1.5×100

=150%change

=150%increase

Can somebody plz help answer these questions correctly thanks! (Grade7math) btw :)

WILL MARK BRAINLIEST WHOEVER ANSWE FIRST :DDD

Answers

Answer:

1. both boxes 3

2. both boxes 7

3. both boxes 5

4. both boxes 2

5. top box 12 bottom 18

6. top box 9 bottom box 11

7. top box 42 bottom box 60

8. top box 4 bottom box 5

Solve this question. 50 pts!!

Answers

Answer:

QR = 19

SR = 24

PT = 25

SQ = 14

QRS = 47 °

PQS = 39°

RPS = 42°

PSQ = 67°

Answer:

answer

Step-by-step explanation:

QR = 19

SR = 24

PT = 25

SQ = 14

QRS = 47 °

PQS = 39°

RPS = 42°

PSQ = 67°

Eugene had $24 to spend on three pencils.
After buying them he had $18. How
much did each pencil cost?


Answers

Answer:

$2

Step-by-step explanation:

First, we find the total he spent on the three pencils.

$24 - $18 = $6

He spent $6 on the 3 pencils.

Now we find how much each pencil cost.

$6/3 = $2

Answer: $2

Answer:

Each pencil cost 2$

First I did what he has to spend 24 then subtracted 18 from it what he had left that gave me 6. Next knew that he had bought three pencils so I did 6 divided by 3 and that left me with an answer of 2 so 2$

Hope this helped and if its not a problem could i gt brainliest?

I WILL MARK BRAINLIST! TIS IS SIMPLE PROBABILITY. A bag of game markers contain 4 red markers, 5 blue markers, 3 yellow markers, and 3 green markers. If Mario reaches into the bag and pulls out a game marker without looking, what is the probability he will NOT pull out a blue game marker?
A. 1/2
B. 1/3
C. 4.15
D. 2/3

Answers

Answer: D. 2/3

Step-by-step explanation:

There are 15 markers in total. Out of these 15 markers, there are 5 blue ones.

If Mark reaches into a bag to pull out one marker and hopes it is not blue, there would be a 2/3 probability as 2/3 of the markers are not blue.

Can i have some help please

Answers

Answer:

C)   [tex] -1\frac{5}{8}x + 3 [/tex]

Step-by-step explanation:

[tex] \frac{1}{2}(\frac{3}{4}x + 10) - 2(x + 1) = [/tex]

[tex] = \frac{3}{8}x + 5 - 2x -2 [/tex]

[tex] = \frac{3}{8}x + 5 - \frac{16}{8}x - 2 [/tex]

[tex] = -\frac{13}{8}x + 3 [/tex]

[tex] = -1\frac{5}{8}x + 3 [/tex]

Answer: C)   [tex] -1\frac{5}{8}x + 3 [/tex]

Please help me, I don’t know what to do

Answers

Answer:

Number 1 is a function. If you can draw a vertical line through the line graphed and it doesn't pass through it twice, it is considered a function.

Number 2 is B.

Number 3 is A. **I don't know this one for certain, but I graphed A and B for you.

I don't know number 4.

Number 5 is Beatz on Demand. This company charges $5.99 a month, while iTunez charges $8.99 a month.

Step-by-step explanation:

Below is the graph for number 3.

HAPPY NEW YEAR plz five me the right answer. ​

Answers

Answer:

It's the second one.

Step-by-step explanation:

As hours work increase, math average decrease

125 is 30% of what number​

Answers

Answer:

24

Step-by-step explanation:

Answer:

125 is 30% of the number 24, hope this helps

Step-by-step explanation:

We have, 125% × x = 30

or, 125/100 × x = 30

Multiplying both sides by 100 and dividing both sides by 125,

we have x = 30 × 100/125

So your answer is X=24

Sam builds 360 toys in 8 hour. At that rate,how many toys would he build in 4 minutes

Answers

Answer:

He can build 3 toys in 4 minutes.

Step-by-step explanation:

Divide 360 by 8 since you are dividing it first to get the number of toys he can build in an hour.  As a result, he can build 45 toys in an hour.  Divide that number by 15 since 4 times that number equals an hour.  You should get 3 toys as your final result.  

For easier explanation, multiply 8 and 15 together to get 120 for better understanding.  Divide that number from 360 to get the same answer.

which algebraic expression is equivalent to w+w+w+3+2

Answers

Answer:

5+3w

Step-by-step explanation:

make it braintliest please

Answer:

w^3+5

Step-by-step explanation:

I am pretty sure you would just combine like terms and then add them together.

I hope this helps u out...

y = -3x - 5 ||| y = 9x + 7
A. (1,2)
B. (1,-2)
C. (-1,2)
D. (-1,-2)
E. No solution
F. Infinite solutions
PLEASE HELP ITS DUE TODAY

Answers

Answer:

d. (-1,-2)

Step-by-step explanation:

-3x-5=9x+7

-5=12x+7

-12=12x

-1=x

y=-3x-5

y=-3(-1)-5

y=3-5

y=-2

Can you guys help me please ?!! Thank you!

Answers

Answer:

3/5

Step-by-step explanation:

3x3=9

3x5=15

3/5=15

Answer:

3/5

Step-by-step explanation:

jsvdksbdjsbddhdcdhsnsbs

Please answer!! I added a screenshot

Answers

Answer:

S + 2.5S + (2.5S - 3.3)

Step-by-step explanation:

To get the perimeter of ANY shape, simply add up all the sides.

PLEASE HELP!!!! On average, Jack can fold his laundry in 30 minutes, but, depending on how much laundry he has, his time can vary from the average by 10 minutes.


Which absolute value equation can be used to calculate Jack's maximum and minimum time to fold his laundry?


Let x represent the maximum and minimum time.



|x−30|=10


|x+10|=30


|x−10|=30


|x+30|=10

Answers

Answer:

I think it is the third choice

The absolute value equation can be used to calculate Jack's maximum and minimum time to fold his laundry is, |x−30|=10. So, Option A is correct

What is an Equation ?

An equation is a mathematical term, which indicates that the value of two algebraic expressions are equal. There are various parts of an equation which are, coefficients, variables, constants, terms, operators, expressions, and equal to sign.

For example, 3x+2y=0.

Types of equation

1. Linear Equation

2. Quadratic Equation

3. Cubic Equation

Given that,

On average, Jack can fold his laundry in 30 minutes

How much laundry he has, his time can vary from the average by 10 minutes

So, maximum time can be 40 minutes

And minimum time can be 20 minutes

Therefore, The result is  |x-30| =10

To know more about Equation check:

https://brainly.com/question/1529522

#SPJ2

3y=-6x+1 solve for y

Answers

Answer:

y= 2x +1/3

Step-by-step explanation:

3y= 6x+1

divide the whole equation by 3 to isolate y

y= 2x+1/3

Following are the calculation to the given value:

Given:

[tex]3y=-6x+1[/tex]

To find:

[tex]y=?[/tex]

Solution:

[tex]\to 3y=-6x+1\\\\\to y=-\frac{6x+1}{3}\\\\\to y=-\frac{6x}{3}+\frac{1}{3}\\\\\to y=-2x+\frac{1}{3}\\\\[/tex]

The final value of y is "[tex]=-2x+\frac{1}{3}\\\\[/tex]".

Learn more:

brainly.com/question/22800706

PLEASE PLEASE HELP MEEE

Answers

Answer:

d. [tex]x=a(1-\frac{y}{b})[/tex]

Step-by-step explanation:

[tex]\frac{x}{a} + \frac{y}{b} = 1[/tex]

[tex]\frac{x}{a} = 1 - \frac{y}{b}[/tex]

[tex]x = a(1 - \frac{y}{b})[/tex] <----- This is your answer

Hope this helps!

PLEASE HELP MEEEEE!!!! DUE TODAY!!! WILL GIVE BRAINLIST
Classify each polynomial and determine its degree.
The polynomial 3x2 is a (blank)
with a degree of (blank)
.The polynomial x2y + 3xy2 + 1 is a (blank)
with a degree of (blank)
.

Answers

Answer: The polynomial 3x2 is of one variable with a degree of 2.

The polynomial x2y + 3xy2 + 1 is of two variables a with a degree of 3.

Step-by-step explanation: For this case we have the following polynomials:

3x2

x2y + 3xy2 + 1

We have then:

For 3x2:

Classification: polynomial of one variable:

Degree: 2

For x2y + 3xy2 + 1:

Classification: polynomial of two variables

Degree: 2 + 1 = 3

Answer:

monomial  

2    

trinomial  

3

Step-by-step explanation:

Which line segments are intersecting?

Answers

Answer:

b

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

someone help pls lol​

Answers

Answer:

I dont under stand sorry :(

Step-by-step explanation:

County Middle School is buying pizza for all of its students. Each pizza has 8 slices. Each student will receive 1 slice. There are 700 students at County Middle School. How many pizzas will the school need to buy?

Answers

Answer:

88 at least

Step-by-step explanation:

So, if you need to give each student a slice remainders round up to the nearest whole number. So first you simply divide 700/8 (Students/Pieces of pizza per slice) and get 87.5. Then you round up to 88 since you cannot buy half a pizza (that's weird). You will have 4 extra slices to feed the teachers btw.

Solve: a + 4 = 48
a = 43
a = 51
a = 44
a = 52

Answers

Answer:

a = 44 is correct

Step-by-step explanation:

a + 4 = 48

plug in the #'s 1 at a time

43 + 4 = 48

47 = 48  FALSE

51 + 4 = 48

55 = 48  FALSE

44 + 4 = 48  TRUE

52 + 4 = 48  FALSE

Hope this Helps!!!

Answer:

Your answer would be a= 44

Step-by-step explanation:

44+4=48

To check: 48-4=44

Therefore, your answer is 44

Evaluate the function: f(x)=x2+2x, find f(−1)

Answers

Answer:

[tex]f( - 1) = - 1[/tex]

Step-by-step explanation:

[tex]f(x) = {x}^{2} + 2x[/tex]

Substitute x = -1 in the equation.

[tex]f( - 1) = {( - 1)}^{2} + 2( - 1) \\ f( - 1) = 1 - 2 \\ f( - 1) = - 1[/tex]

please help i will add u to brainliest ​

Answers

Answer:

6 batches

Step-by-step explanation:

Answer:

0.6 maybe

Step-by-step explanation:

1. What is the circumference of a circle if the diameter is 18 in? 2. What is the circumference of a circle if the radius is 8 m?

Answers

Answer:

Step-by-step explanation:

Circumference, C=2-3.14*r

diameter is 18, r=9

C=2*3.14*9=56.54 in^2

if radius is 8 m

C=2*3.14*8=50.27 m^2

The local Farm Market sells peppers at five for $4.75.


How many peppers could you buy for $20?

Answers

Answer:

4

Step-by-step explanation:

Answer:

You can buy 4 peppers

Step-by-step explanation:

 4.75$

  4.75$

+ ___________

   9.50$ (for 2 peppers. Now add another 4.75)

   4.75$

+ ___________

   14.25$ (for 3 peppers. Again, let's add another 4.75)

    4.75$

+ ___________

   19.00$  (for 4 peppers. Once a, let's add another 4.75)

    4. 75$

+ ___________

   23.75$                

23.75$ is wayy over $20 . So your answer will be 4 peppers since 19.00 is smaller then $20

   

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