Mathematics High School

a student has answered 82% of the questions correctly in the examination. He made mistakes in 9 questions Calculate the toltal number of questions in the examination

Answers

Answer 1

Answer:

There is a total 50 questions.

Step-by-step explanation:

Let x = total questions in the exam

Since 82% of the test was scored correctly, that means 18% of the student's exam was scored incorrectly.

With this information we can write:

[tex]18\%x=9[/tex] (Given that the student made 9 mistakes)

[tex]x=9\div18\%[/tex] (divide 18% on both sides)

[tex]x=50[/tex]

∴ There was a total of 50 questions in the examination.

Related Questions

Tell me which ones are rational or irrational numbers I will number them 1 to 10

1. 3.9

2. 14.9876.....

3. √9

4. 2 1/2

5. 13

6. √100

7. √10

8. 2π

9. √5 + 9

10. 9.812.....

Answers

Answer:

1,3,4,5,6

Step-by-step explanation:

all the other answers to not have a definite end to them. rational numbers end

7/12 divided by 2 5/8

Answers

Answer:

2/9 or 0.2 repeating

hope this helps and that it is correct

Help plss (find the perimeter) thx

Answers

Answer:

64 units

Step-by-step explanation:

divide the shape into two shapes:

first one: 15+15+4+4=38

second shape:7+7+6+6=26

pweimwter for the whole shape: 38+26=64 units

2. Brice has $1200 in the bank. He will deposit $40 per week from his
paycheck.

Answers

Answer:

if the question is how much he'll have by the end of the week, the answer is $920

The equation that models the given sstatement is $1200 + 40x

Sum of values

Given the following parameters

Initial amount of money in bank = $1200

If he will deposit $40 per week from his paycheck,the amount of money he willhave at the end of x weekis given as:

Total = Iniital + 40x
Total .= $1200 + 40x

Hence the equation that models the given sstatement is $1200 + 40x

Learn more on linear equation here: https://brainly.com/question/13729904

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A glass is 1/3
full. Then 75cm3 of orange juice is poured in.
The glass is now 3/4
full. What is the total volume of the glass?

Help please!

Answers

The total volume of the glass is 100cm3 = 100ml
Explain: the glass is divided in 4 parts, the glass is 3/4 when 75 cm3 of orange is poured in. To find 1 part, calculate 75/3=25 (cm3). So the total volume is 4 parts, then 25*4=100 (cm3)

Write an equation for the line in the given form.

slope is -5 and (5, 4) is on the line; standard form

Answers

Answer:

5x+y=29

Step-by-step explanation:

You use the information that is given and convert it into point-slope form y-y1=m(x-x1) like so. y-4= -5(x-5). Then you solve for y and you get y= -5x+29 which is slope intercept form (y=mx+b). Then you transform it into Standard form (ax+by=c) so all you do is add 5 on both sides and you get 5x+y=29. Now you have found your solution.

If you can please make my answer the brainliest that would be much appreciated. Thanks!

Which values represent solutions to the equation? Tangent (StartFraction 3 pi Over 4 EndFraction minus 2 x) = negative where x Is an element of [0, Pi]

Answers

Answer: we need a picture to solve this, please repost with a picture of your assignment

Step-by-step explanation:

Answer:

D.) 0, pi/2, pi 3pi/2

Step-by-step explanation:

Generate an equivalent expression for:
5(2x+3y)

i kinda need this awnser asap also its for a flip grid so not to advanced

I WILL GIVE BRAINLIEST

Answers

Answer:

y = [tex]\frac{-2x}{3}[/tex]

Step-by-step explanation:

Distribute 5 to 2x and 3y by multiplying each by 5

10x + 15y

Isolate y to one side of the equation

15y=-10x

Divide each side by 15

y = [tex]\frac{-2x}{3}[/tex]

Answer:

5(2x + 3y) = 10x + 15y

Step-by-step explanation:

There is one particular way to find an equivalent expression which I am assuming is what the problem is looking for. When given a factored expression in the form of a binomial (two terms), by creating an equivilent expression, you can distribute the binomial inside the parenthesis factored by the coefficient 5. So 5(2x + 3y) = 5(2x) + 5(3y) = 10x + 15y.

5 is also the greatest common factor of 10x + 15y which is why this expression simplifies down to the equivilent expression 5(2x + 3y).

10x + 15y as a GCF is really the GCF of 10 and 15. What you do is individually split each number into all its possible factors(set of whole numbers that multiply to that number), and then find the factor that they both share.

For example, 10 has factors of 5, 2, 1, 10. And 15 has factors of 15, 1, 5, 3.

Notice how 5 appears in both.

Sebastián was saving $8.50 each week in order to have enough money for a phone that costs $122. If his father started him off with $25, write an inequality that can be used to determine the minimum number of whole weeks, w, Sebastián will need to save.

Answers

Step-by-step explanation:

122 - 25

y= 8.5x + 25

97/8.50 <

11.4 --> 12

x < 12

Answer:

25 + 8.50w ≥ 122

Step-by-step explanation:

Given that:

Amount saved per week = $8.50

Cost of phone = $122

Starting amount = $25

Minimum Number of whole weeks (w) Sébastien will need to save :

Starting amount + (weekly saving * number of weeks) ≥ 122

25 + 8.50w ≥ 122

8.50w ≥ 122 - 25

8.50w ≥ 97

w ≥ 97/8.50

w ≥ 11.4117

Number of whole weeks = 12

help please!!!!!!!!!

Answers

Answer:

[tex]f\left(0\right)=\left(0\right)^2-4\left(0\right)=0-0=0[/tex]

[tex]f\left(1\right)=\left(1\right)^2-4\left(1\right)=1-4=-3[/tex]

[tex]f\left(2\right)=\left(2\right)^2-4\left(2\right)=4-8=-4[/tex]

[tex]f\left(3\right)=\left(3\right)^2-4\left(3\right)=9-12=-3[/tex]

[tex]f\left(4\right)=\left(4\right)^2-4\left(4\right)=16-16=0[/tex]

Step-by-step explanation:

Given the function