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TiliK225 [7]
3 years ago
6

Ethan correctly answers 80% of the total questions on his history test. Enter the number of questions on Ethan’s history test.

Mathematics
2 answers:
jasenka [17]3 years ago
8 0
It might be about 20 questions
Citrus2011 [14]3 years ago
5 0
Since you didn't give me a total # of questions on the test, I can't give you a direct answer.... 


But I can walk you through.

In math, "of", means you have to multiply. 

80%= .8  This is bc 100% is = 1.00. 
() mean times or multiplied by
====================================================================
So you would do .8(how ever many total questions were on the test)
Whatever # you get is the answer. 


Hope I could help!!!
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In a class of 40 students, 26 are girls and 14 are boys. What is the ratio of girls to the total number of students?
marshall27 [118]

Answer:

13:20

Step-by-step explanation:

no. of girls=26

total no. of students =40

ratio of girls to total no. of students=26:40

which means, the ratio is 13:20

5 0
2 years ago
Please help asap. it’s 2 am and idk how to do this
lesya692 [45]

This is an example of a piecewise defined function. It means that the function has not a unique formula to represent it, but it depends on "where" you want to compute it.

So, if you choose any input x, you have two alternative:

  • If x \neq 3 (i.e., if you've chosen any input that is not 3), the output will be the opposite of the input you've chosen (y=-x)
  • If x=3, the ouput will be -1.

So, let's forget about x=3 for a moment. For any input x you choose, the answer is -x. The graph of this function is the bisector of the second and fourth quadrant.

Now remember that there is our special case: you have to "carve a hole" in our line, at x=3, and assing to this point the value -1, instead of what we would expect, i.e. -3.

So, the graph of this function is the line y=-x, except for one point (x=3), where we reassign the value to be -1.

5 0
3 years ago
Answer the problem :)
Tomtit [17]
The domain is the value of x. In this case, -3≤x≤7
the range is the value of y. in this case, -1≤y≤9

this is not a function, because the same x value has two corresponding y values. For example, when x=5, y=0 or y=8

It IS a function if every x value has only one corresponding y value. 
5 0
2 years ago
Square root of 476 is?
steposvetlana [31]

Answer:

The square root of 476 is 21.8

5 0
3 years ago
Read 2 more answers
The length of a rectangle is 3 meter shorter than3 times its width.Find the length and width if the perimeter is 210 meters
Shkiper50 [21]

Answer:

length = 78 m , width = 27 m

Step-by-step explanation:

let w represent width then length l = 3w - 3

the perimeter (P) is calculated as

P = 2l + 2w = 210 , substitute values

2(3w - 3) + 2w = 210 ← distribute parenthesis and simplify left side

6w - 6 + 2w = 210

8w - 6 = 210 ( add 6 to both sides )

8w = 216 ( divide both sides by 8 )

w = 27 and l = 3(27) - 3 = 81 - 3 = 78

Then length = 78 m and width = 27 m

8 0
3 years ago
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