Mathematics High School

In a maths competition each correct answer gets three marks, but one mark is deducted for each incorrect answer.

Grace answers all 30 questions and scores 30 marks. How many questions did she get wrong?

Answers

Answer 1

Answer:

0

Step-by-step explanation:

Because there was 30 question, and she got 30 marks

30 - 30 = 0

Answer 2
i think 20
there are 90 possible marks. since she got 30, i divided 30/90. which resulted in 0.333333. i think multiplied that by 30 to get the number of correct answers which was 10, leaving 20 incorrect

Related Questions

Can someone plz help really quickly!? Thank you! Marking brainlyest to to the first and correct answer!! Worth a lot of points to!!

Answers

Answer:

I believe its A. 7/16 inches per hour

Step-by-step explanation:

This is wrong don't put this

Help will mark Brainliest

Answers

Answer:

ion know if you still need the answer but i also may need more detail in order to answer your question may you explain the way it needs to be done then you will get your answer

Step-by-step explanation:


[tex]4x + 5y = 19 \\ x + 5y = 13[/tex]
I need some help putting it in ordered pair​

Answers

Subtract 5y from both sides of the equation
X=13-5y

I need help pls !!!!!!

Answers

[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Trigonometry.

here, we use the Linear pair property of the adjacent angles.

We know that, all the adjacent angles in a linear pair add to get 180°

so we get as,

=> (n+6) +90°+(2n+3) =180°

=> (n+6) +(2n+3) =180-90

=> 3n+9 = 90

=> 3n= 90-9

=> 3n = 81

hence, n = 81/3

=> n = 27°

thus the value of n is 27° .

2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2x2=

Answers

Answer:

..

Step-by-step explanation:

The graph represents the amount a waiter earns over time.
According to the graph, what is the constant of proportionality?

A. The waiter earns $25 an hour.
B. The waiter earns $20 an hour.
C. The waiter earns $15 an hour.
D. The waiter earns $10 an hour.

Answers

A. $25 an hour -simply divide the amount made by the hours worked

Solve each system of equations.
2x- 4y = 20
x=4

Answers

Answer:

(x,y)=(4,-3)

Step-by-step explanation:

2x- 4y = 20

x=4

Substitute the value of x

2*4-4y=20

Solve equation

y=-3

A possible solution is

(x,y)=(4,-3)

Check the solution

2*4-4*(-3)=20

4=4

Simplify

20=20

4=4

The ordered pair is the solution

The solution of the given system of equations is y = -3.

What is the equation?

A formula known as an equation uses the same sign to denote the equality of two expressions.

In another word, the equation must be constrained with some constraints.

For example 5x + 4y = -8

Given the set of equations,

2x- 4y = 20

x=4

By substitution,

2(4) - 4y = 20

8 - 4y = 20

-4y = 20 - 8

-4y = 12

By multiplying by -1 both sides

4y = -12

By dividing 4 both sides

y = -3

Hence "The solution of the given system of equations is y = -3".

For more about the equation,

brainly.com/question/10413253

#SPJ2

what see 230×28 i need help bad plz help me

Answers

230x28 is 6440





.............

Answer: 6,440

                                                2

Step-by-step explanation:    230

                                               x 28

                                            ————-

                                            1

                                              1,840

                                            + 4,600

                                           —————

                                              6,440    

8 (-5) (4) =
Please I need the answer

Answers

Answer:

-160

Step-by-step explanation:

you can plug this into a calculator for a quick answer :)

Find the value of X
7/x-10 = 3/6

Answers

Answer:

2/3

Step-by-step explanation:

7/x -10 = 3/6

7/x =3/6 +10

7/x = 63/6

42 = 63x

x = 42/63 or 2/3

Answer:

2/3

Step-by-step explanation:

PLEASE, PLEASE HELP !! :(

Answers

Answer:

no association

Step-by-step explanation:

hope this helps I'm pretty sure this is right

Factor 3x^2 + 7x + 2

Answers

Answer:

(x+2)(3x+1) are the factors

Answer:

(3x+1)(x+2)

Step-by-step explanation:

I don't know how to explain it but that's what I got.

I hope it's right!

what is affected by acceleration

Answers

Answer:

Pretty much everything, my dude

Step-by-step explanation:

May I have brainliest please? :)

For the function f(x)=3(x-1)^2+2, identify the vertex,domain, and range -The vertex is (1,2), the domain is all real numbers, and the range is y > 2. - The vertex is (1,2), the domain is all real numbers, and the range is <2. -The vertex is (-1,2) the domain is all real numbers, and the range is y>2. -The vertex is (-1,2) the domain is all real numbers, and the range is y<2

Answers

Answer:

The function is...f(x)=(-1,-2)

Step-by-step explanation:

Answer:D in incorrect

What is the average rate of change for the following graph over the interval 1 ≤ x ≤ 3?

A. 4

B. -4

C. 3

D. -3

Answers

The answer is c


I hope that helps you

2 (x+6) +3x +4 simplified

Answers

Answer: 5x+16

Step-by-step explanation:

Distribute

2x+12 + 3x + 4

Add like terms

5x+16

what’s the slope of the line??

Answers

If I did the math correctly I’d should be -5 or rewritten as -5/1.

Write the slope intercept form of the equation of the line through the given point with the given slope through (-2,5),slope-3/2

Answers

Answer:

Slope Intercept Form: y= -3/2× + 2

Please help! Thanks!

Answers

Answer:

1st image:
1/3, 3/5, 5/6

2nd image:
1/6, 1/4, 1/3

Explanation: Use a calculator to divide each fraction and order them from smallest to largest. Hope this helps! :)

Answer:

1/3, 3/5, 5/6 is the correct order from least to greatest.

Step-by-step explanation:

HELPPPPP ASAPPPPP PLSSSS

Answers

C tell me if you get it right

Will mark brainliest if I can.

Answers

Answer:

(0, -4)

(2,0)

Step-by-step explanation:

Basically x intercept is (0, -4)

Y intercept is (2, 0)

Hope I helped!

The map shows the location of four places in a school.

Pat's English class is located in the same quadrant as the gym. Which of the following could be the coordinates of the English classroom?

(2, 5)

(−2, 5)

(−2, −5)

(2, −5)


Plzz help

Answers

Answer:

the answer would be (-2,5)

Hope it helps!

Answer:

(-2,5)

Step-by-step explanation:

The quadrant is was by the 2 then you use that knowledge to get your answer

Tiffany is filling her daughter’s pool with water from a hose. She can fill the pool at a rate of 1/10 gallon/seconds.How many gallons of water can she fill in 50 seconds

Answers

Answer:

5 gallons

Step-by-step explanation:

If she can do 1/10 gallon per seconds, that means she can do 5/50.

You can write it as this ratio:

1/10 = x/50.

You know that 10 * 5 = 50.

Since it is a constant ratio, it has to be 1 * 5 = x

Since 1 * 5 = 5, Tiffany can fill the pool 5 gallons per 50 seconds.

what is 25 divided by 4150

Answers

Answer:

166

Step-by-step explanation:

Answer:

166

Step-by-step explanation:

Math answers to fraction 4150 divided by 25 can be calculated as follows.

4150/25 math problems division = 166. Therefore 166 to 2 decimal places= 166

4150/25 divided by 2 » (4150/25) ÷ 2 » 166 ÷ 2 = 83 . Check 4150/25 long division below

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What is the coefficient of the second term in this expression?
a2c3+a3c+1+ac2

Answers

Answer:

1

Step-by-step explanation:

I assume the term is , and since there is no visible coefficient the coefficient is implied to be 1

Jerry scored 581 points by collecting 7 coins. In all, how many coins does Jerry have to collect to score a total of 996 points? Solve using unit rates.

Answers

Answer:

12 coins

Step-by-step explanation:

Points scored by collecting 7 coins = 581

Number of coins required to collect 996 points

Let Number of coins = c

7 coins = 581 points

c coins = 996 points

Cross multiply :

581 * c = 996 * 7

581c = 6972

Divide both sides by 581

581c / 581 = 6972 / 581

c = 12

Hence, number of coins required to collect 996 points is 12

solve the following equation- 4(3d – 2) = 8d - 5

Answers

The answer would be -3/4

Answer:

d= 0.65 or 13/20

Step-by-step explanation:

-4(3d - 2) = 8d -5

-12d +8 = 8d -5

arrange like terms on the same side of the equation

8 +5 = 8d +12d

13 = 20d

13/20 = d

What is the equation of the line in the graph below?

Answers

Answer:

y=1x+-3

Step-by-step explanation:

using rise over run we can see that we go up one from a point and over 1 from a point making our slope 1. then you you find the y-intercept and here that is very easy because we can clearly see the line pass through -3 on the y axis. the just substitute in your values to get y=1x+-3

please help this is the only question im stuck on

Answers

i think a, bc for the x it’s 2x and the y is +5

Evaluate the following expression. Type your answer as a number.

8 + 23 - (4 × 3) =
the 23 is a exponet jus to let you know

Answers

its 2

Hope this helps! <3

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