All categories

3 years ago

Karen missed 9 questions on the math exam. If she missed 20% of the questions, how many questions were on the exam all together?

Mathematics

2 answers:

VashaNatasha [74]3 years ago

8 0

Answer:

Karen missed 9 of the 45 questions on her mathematics exam. The exam had a total of 45 questions.

Step-by-step explanation:

If Karen missed 9 questions (which equals 20% of the exam), then she completed 80% of the exam.

9 questions = 20%

80% = x

To solve this, we can divide the number of questions missed (9) by 20%, which equals 45. Thus, Karen's test had a total of 45 questions!

Llana [10]3 years ago

5 0

Answer:

There were 45 questions.

Step-by-step explanation:

20 out of a hundred is one fifth. this one fifth of the test is nine questions. we want to find the whole number so we do 9 times 5 to get he other 80% which means 45 questions on the test.

You might be interested in

PLEASE HELP THANK YOU :)

Lostsunrise [7]

Answer:

the first option

4 0

2 years ago

A circle with a radius of 10 inches is placed inside a square with a side length of 20 inches. Find the area of the square.

NikAS [45]

I think the answer is A , if y’all don’t get it right I’m sorry

4 0

3 years ago

Read 2 more answers

The number of library books increased by 20% after it bought new books in May. The number increased by another 20% after someone

anygoal [31]

Answer:

Step-by-step explanation:

4 0

3 years ago

The length of a rectangle is 3ft less than double the width, and the area of the rectangle is 14ft^2 find the dimensions of rect

german

Answer: $4\times 3.5\ ft^2$

Step-by-step explanation:

Given

area of the rectangle is $A=14\ ft^2$

Suppose width is given by w

So, length is $l=2w-3$

The area of a rectangle is $A=l\times w$

putting values

$\Rightarrow A=(2w-3)w\\\Rightarrow 14=2w^2-3w\\\Rightarrow 2w^2-3w-14=0\\\Rightarrow 2w^2-7w+4w-14=0\\\Rightarrow w(2w-7)+2(2w-7)=0\\\Rightarrow (2w-7)(w+2)=0\\\\\Rightarrow w=\dfrac{7}{2}\ ft$

length is $l=4\ ft$

6 0

2 years ago

HELP PLS!!!! IM GONNA GIVE YOU THE BRANLIEST ANSWER!!!

djverab [1.8K]

Answer:

Step-by-step explanation:

By counting the height ( frequency ) of each block and adding gives the number of students in total

20 - 24 → 5

24 - 28 → 6

28 - 32 → 5

32 - 36 → 2

36 - 40 → 7

Total = 5 + 6 + 5 + 2 + 7 = 25

4 0

3 years ago