in a test consisting of 90 questions, Ama answered 75% of the first 40 questions correctly. If she had to get a score of 80% in the test, (i) how many questions did she answer correctly out of the first 40 questions? (ii) how many questions should she answer correctly out of the 90 questions? (iii) what percentage of the remaining 50 questions should she answer correctly in order to get the 80%?​

Answers

Answer 1

Answer:

total question =90

she obtained 75% of first 40 questions

No. of question she got correct in first 40 = 75% * 40 = 30

2. in order to get 80% out of 90,

the no. of questions got correct by Ama = 80% * 90 = 72

3. As she already got 30 c0rrect in first 40 questions, the number of question she needs correct for remaining 50 = (72-30) = 42

percentage = 42/50*100% = 84%

Answer 2

The number of questions answered correctly on the first 40 questions  is 30.

The questions answered correctly of the 90 questions is 72.

The percentage answered correctly on the last 50 questions is 84%.

How many questions were answered correctly?

Percentage can be described as a fraction of an amount expressed as a number out of hundred.

Number of questions answered correctly on the first 40 questions: 40 x 0.75 = 30

Questions answered correctly of the 90 questions: 90 x 0.8 = 72

Number of questions gotten correctly on the last 50 questions: (0.8 x 90)  30 = 42

Percentage = 42/50 x 100 = 84%

To learn more about percentages, please check: https://brainly.com/question/25764815

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Related Questions

3x+3y=180 what is the answer to this problem

Answers

Answer:

If you are solving the equation for x :

3x + 3y = 180

3x = -3y + 180

x = -y + 60 or x = 60 - y

If you are solving the equation for y:

3x + 3y = 180

3y = -3x + 180

y = -x + 60 or y = 60 - x

hello If a map is drawn using a scale of 1cm/80mi and the two cities are 280 miles apart how far apart are the cities on the map?​

Answers

Answer:

3.5 cm.

Step-by-step explanation:

scale  1cm : 80mi.

280mi x  1 cm  

              80mi

= 3.5 cm.

Answer:

3.5 cm

Step-by-step explanation:

this question is really easy to solve once you understand it!

all i did was divide 280 by 80, because 1 cm = 80 m, 280/80 = 3.5 cm

2. The area, A, of a square whose side length is n.

I need the answers because it’s already overdue please help

Answers

Answer:

area of square = l² = n²

Step-by-step explanation:

Answer:

[tex]A=n^{2}[/tex]

Step-by-step explanation:

Find area of a square

Area of square = length x width

Since a square's has the same length on all sides, we can square both sides.

Area of square = [tex]length^{2}[/tex]

If length = n

Then,

[tex]A=n^{2}[/tex]

Points A, B, and C are collinear. Point B is the midpoint of AC. AB=12x-398. BC=22.
Solve for x. *

Answers

Answer:

         x = 35

Step-by-step explanation:

Collinear points A, B, and C and point B being midpoint of AC means:

AB = BC

12x - 398  =  22

   + 398      + 398

 12x = 420

  ÷12    ÷12  

    x = 35

10 - 3x < 16
Can y’all help me pls

Answers

Answer:

x>-2

Step-by-step explanation:

first you subtract 10 from both sides to find x

10-3x-10<16-10

-3x<6

now here you divide both sides by -3

-3x/-3<6/-3

BUT since you are dividing by a negative number the sign will have to flip

so the answer will be

x>-2

A company wants to develop audio speakers using an inexpensive type of plastic that has a very high quality of sound output. Which customers would most likely give a high evaluation of this product?

those who want to save money and will use the product for only a few years
those who want a top-quality product no matter how much it costs
those who want to save money and use the speakers for a long time
those who want a long-lasting product and are willing to pay a high price

Answers

Answer:

the answer is A

Step-by-step explanation:

those who want to save money and will only use product for a few years

Answer:

those who want to save money  an will use the product for only a few years

Step-by-step explanation:

i took a test on edge 2020!!!

Write an expression to represent the perimeter of the triangle below in simplest form

Answers

Answer:

Perimeter of the given triangle = [tex]\frac{7x+38}{(x+8)(x+5)}[/tex] units

Step-by-step explanation:

Perimeter of a polygon = Sum of the measures of all sides of the polygon

From the picture attached,

Perimeter of the given isosceles triangle = Measures of two equal sides + remaining side

P = [tex]2(\frac{3}{x+8})+\frac{x}{x+5}[/tex]

  = [tex]\frac{6}{(x+8)}+\frac{x}{(x+5)}[/tex]

  = [tex]\frac{6(x+5)+(x+8)}{(x+8)(x+5)}[/tex]

  = [tex]\frac{6x+30+x+8}{(x+8)(x+5)}[/tex]

  = [tex]\frac{7x+38}{(x+8)(x+5)}[/tex] units

Therefore, perimeter of the given triangle is [tex]\frac{7x+38}{(x+8)(x+5)}[/tex] units

(-2)(7)(-75)(3)(-2)=?

Answers

equals -6300 fjesshehw

Answer:

-6300

Step-by-step explanation:

I just plugged it into my calculator, Google's works just fine :)

Oceanside Bike Rental Shop charges 12 dollars plus 7 dollars an hour for renting a bike. Sandy paid 40
dollars to rent a bike. How many hours did she pay to have the bike checked out?

Answers

x = # of hours the bike was rented.

$40 = $12 + $7x

Subtract $12 from both sides.

$28 = $7x

Divide both sides by $7

4 = x

Sandy rented the bike for 4 hours.

3/4 + (-2 1/2) on a number line.. select the location on the number line to plot the sum.. HURRYYYYY

Answers

Answer:

the answer is -1 3/4

Step-by-step explanation:

what is the value of this expression when p=-2 and q=-1 [(p^2)(q^-3)]^-2

Answers

Answer:

Find the exact value using trigonometric identities.

Exact Form: 1/16

Decimal Form:

0.0625

Step-by-step explanation:

Is 3x + 3x​ 2​= 6x​ 3​ ? Explain.

Answers

Answer:

No

Step-by-step explanation:

It is not, because we can only add the terms that contain x of the same order.

For x to be grouped with x 2 resulting in x 3 the terms would have to be multiplying

In this case they are grouped

x * x 2 = x 3

In this case they are not grouped

x + x 2 = x + x 2

3h-2(4h-5)=10-5h A-0 B-4 C-infinity many solutions D-no solutions​

Answers

Answer:

Step-by-step explanation:

3h - 8h + 10 = 10 - 5h

-5h + 10 = 10 -5h

10 = 10

infinitely many solutions

answer is C

What happens to the aciditiy of soulutuns A and B after dry ice is added

Answers

The pH of solution A decreases, and the pH of solution B decreases.

HELP TIMED!

Piece Wise functions

Answers

Answer:

Last Option: (-∞, 4) U (4, ∞)

Step-by-step explanation:

Domain is the set of x-values that can be inputted into function f(x).

We see that our x-values span all numbers except x = -4. Therefore, it is not included in our domain:

(-∞, 4) U (4, ∞)

solve for the equation 4x+5=9

Answers

Answer:

1

Step-by-step explanation:

4x + 5 = 9
subtract 5 from both sides
4x = 4
divide both sides by 4
x = 1

Which equation is the quadratic regression equation for the data shown in the table?

Answers

Answer: y=0.392x2 - 5.583x +21.167

Step-by-step explanation:

HELP ME PLESE ,3 I NEED THIS

Answers

Answer:

270°

Step-by-step explanation:

[tex]m\widehat{BC} = 360\degree - (146\degree + 90\degree) \\

m\widehat{BC} = 360\degree -236\degree \\

m\widehat{BC} = 124\degree \\\\

m\widehat{ABC} =m\widehat {AB} + m\widehat {BC} \\

m\widehat{ABC} =146\degree + 124\degree \\

\huge \red {\boxed {m\widehat{ABC} =270\degree}} \\

[/tex]

Convert 0.9285714 into a fraction

Answers

0.9285714 = 0.9285714/1
= 9.285714/10
= 92.85714/100
= 928.5714/1000
= 9285.714/10000
= 92857.14/100000
= 928571.4/1000000
= 9285714/10000000

And finally we have:
0.9285714 as a fraction=
9285714/10000000

is the inequality always, sometimes, or never true?
2(x + 6) < 30​

Answers

Answer:

x< 9

Step-by-step explanation:

I'm not sure if it's right but I think it is .

What is the range for the graph shown?


Answers

Answer:

A.) -2<y<3 is the range of the graph

Answer:

C

Step-by-step explanation:

Range refers to the y-values of a function. The line begins at y = -2 and ends at y = 3. Thus, the range is -2 to 3, C.

8x + 2y = 18
what is the literal equation

Answers

Answer:

Step-by-step explanation:

For x:

8x = 18 - 2y

x = (18 - 2y)/8

For y:

2y = -8x + 18

y = -4x + 9

The literal equation is y=-4x+9 from solving this problem

Shivani started the week with $9,000 in her bank account. Then she spent $5,000 on an antique clock. Which integer represents the final balance of the bank account?

Answers

Answer:

4,000 is the integer representing the final balance of the bank account

Step-by-step explanation:

Here, we are told that Shiavni had a total of $9,000 in her bank account at the start of the week of which she spent $5,000 out of it on an antique clock.

Now, we want to know the integer that represents the amount which is the final balance of the bank account.

Mathematically, when we talk of an integer, we are simply referring to a whole number, be it negative or positive.

Thus, the integer is the case is the difference in what she had at the beginning of the week minus the cost of the clock

That would be; $9,000 -$5000 = $4,000

Find the area of a rectangle whose width is 6 and whose length is x – 5.

Answers

Answer:

If X is -5 then the answer is -30 but if it is X minus 5, the answer is X-30

Answer:

x-30

Step-by-step explanation:

Area of a rectangle is

length x width

l x w

[tex]x-5 * 6 = x-30[/tex]

population of 5 places in India in Indian and international system pls answer very important​

Answers

Answer:

84,43,675 - Eighty Four Lakh Forty Three Thousand Six Hundred Seventy Five.

Step-by-step explanation:

Round to the number of decimal places stated in bracket.
2.374 [2]

Answers

Answer:

2.37

I hope this helps, also next time make sure your question makes sense

Whoever has the best answer I will mark the brainliest.

Answers

Answer: 3,4,5,6,52,72,86,105

Step-by-step explanation: when solving the range you find the difference between the highest and lowest values in the set. To find the range, first order the data from least to greatest. Then subtract the smallest value from the largest value in the set.

The musical theme was first introduced by the

Answers

Answer:

entire orchestra I'm gonna say

Can someone help me with this please :)

Answers

It 90 because u mult 10 x9

Answer:

47.25

Step-by-step explanation:

9 times 10.5=94.5/2=47.25

It is given that 1/5<n<1/4. Write down a decimal value of n that satisfies this in equality.

Pls help me!!! Will give brainliest.​

Answers

Answer:

0.20<n<0.25

Step-by-step explanation:

0.20<n<0.25

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