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3 years ago

10

On a math test, Jessica answered 20% questions incorrectly. She answered 16 questions correctly. How many total questions did sh

e answer?

2 answers:

Tanzania [10]3 years ago

8 0

The answer to the question is 36

shutvik [7]3 years ago

3 0

Answer:

20

Step-by-step explanation:

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Solve for x, given the perimeter = 40 cm.<br><br>2x+1+x+4<br>I need fast please help me

koban [17]

X= 11.66 continuing, because 3x+5=40 is the equation. in fraction form it would be 35/3

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2 years ago

85% of all cars sold in chicago are some color other than black. if three hundred black cars were sold in chicago, how many cars

hram777 [196]

Of 85% of cars sold where not black then 100-85% where black = 15%
let the number of cars sold be y
then 15%*y=300
y= 300 divided by 15%
= (300*100)/15
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3 years ago

Write the following quotient in the form a+bi.<br> -7i/2-7i

Helga [31]

Answer:

$\large\boxed{\dfrac{49}{53}-\dfrac{14}{53}i}$

Step-by-step explanation:

$\text{Use}\\\\i=\sqrt{-1}\to i^2=-1\\\\(a-b)(a+b)=a^2-b^2\to(a-bi)(a+bi)=a^2+b^2\\\\\text{distributive property}\ a(b+c)=ab+ac\\---------------------\\\\\dfrac{-7i}{2-7i}=\dfrac{-7i}{2-7i}\cdot\dfrac{2+7i}{2+7i}=\dfrac{-7i(2+7i)}{2^2+7^2}=\dfrac{(-7i)(2)+(-7i)(7i)}{4+49}\\\\=\dfrac{-14i-49i^2}{53}=\dfrac{-14i-49(-1)}{53}=\dfrac{-14i+49}{53}\\\\=\dfrac{49}{53}-\dfrac{14}{53}i$

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3 years ago

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How many solutions exist for the given equation? 3x 13 = 3(x 6) 1 zero one two infinitely many

romanna [79]

An equation is formed of two equal expressions. There is no solution set of the equation 3x+13 = 3(x+6)+1.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

The equation can be solved in the following manner,

$3x+13 = 3(x+6)+1\\3x+13=3x+18+1\\3x+13=3x+19$

Since both the sides of the equation are the same in terms of variable and the constant terms are not the same. Therefore, there is no solution set of the equation 3x+13 = 3(x+6)+1.

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1 year ago

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steposvetlana [31]

<span>m, because triangle ABC is similar to triangle EDC (by 3 congruent angles).</span>

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3 years ago

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