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V125BC [204]
3 years ago
8

. You answer 95% of the questions correctly on a 20-question test. How many questions do you answer correctly

Mathematics
2 answers:
lions [1.4K]3 years ago
7 0

Answer:You answered 19 questions correctly and 1 question wrong

Step-by-step explanation:First you have to divide 20 by whatever number that can get you to the number 100 by 20,which is 5(100 divided by 5 equals 20)Lastly you have to divide 95 by 5 and you get 19!

Brums [2.3K]3 years ago
6 0

Answer:

19 one question wrong

Step-by-step explanation:

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Here are two expressions whose product is a new expression, :
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Answer:

1. Fill in the box with 1

2. Fill in the box with -2

Step-by-step explanation:

Expression:

(-2x^3 + [\ ]x)(x^{[\ ]}+1.5) = A

Solving (1): Fill in the box to make it a polynomial.

To make it a polynomial, we simply fill in the box with a positive integer (say 1)

Fill in the box with 1

(-2x^3 + [1]x)(x^{[1]}+1.5) = A

Remove the square brackets

(-2x^3 + x)(x^1+1.5) = A

(-2x^3 + x)(x+1.5) = A

Open bracket

-2x^4 - 3x^3 + x^2 + 1.5x = A

Reorder

A = -2x^4 - 3x^3 + x^2 + 1.5x

The above expression is a polynomial.

This will work for any positive integer filled in the box

Solving (2): Fill in the box to make it not a polynomial.

The powers of a polynomial are greater than or equal to 0.

So, when the boxes are filled with a negative integer (say -2), the expression will cease to be a polynomial

Fill in the box with -2

(-2x^3 + [-2]x)(x^{[-2]}+1.5) = A

Remove the square brackets

(-2x^3 - 2x)(x^{-2}+1.5) = A

Reorder

A = (-2x^3 - 2x)(x^{-2}+1.5)

Open brackets

A = -2x-3x^3-2x^{-1}-3x

Collect Like Terms

A = -3x^3-2x-3x-2x^{-1}

A = -3x^3-5x-2x^{-1}

Notice that the least power of x is -1.

Hence, this is not a polynomial.

3 0
3 years ago
Evaluate the expression when x= -7.4 and y= -6.3<br>-7y+2x​
GenaCL600 [577]

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-7(-6.3) + 2(-7.4) = -29.3

5 0
3 years ago
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hammer [34]

Answer:

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2 years ago
Felicity accidentally overdrew her bank account by $24.65. She then deposited a birthday check from her grandma for $25.00, paid
tensa zangetsu [6.8K]

Answer:

It would be  -13.6

Step-by-step explanation:

I used my calculator for this,  

-24.65 +25 - 46.75 + 32.80 = -13.6

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