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3 years ago

You pick a card at random, put it back, and then pick another card at random.

Mathematics

2 answers:

Misha Larkins [42]3 years ago

8 0

1/3 or 3.3 (repeating 3)

Colt1911 [192]3 years ago

4 0

Answer: i think the correct answer would be 1/3

Step-by-step explanation:

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A theater sells children's tickets for half the adult ticket price. if 5 adult tickets and 8 children's tickets cost a total of

Ghella [55]

27 = 5x/2 + 8y is an equation to use to solve

4 0

3 years ago

What number must you add to complete the square?<br> x^2 + 2x = -1

Andru [333]

$\large\begin{array}{l} \textsf{You must add 1 to complete the square.}\\\\ \textsf{There is a very common special product: (square of a sum)}\\\\ \mathsf{(a+b)^2=a^2+2ab+b^2}\\\\\\ \textsf{Take the given equation:}\\\\ \mathsf{x^2+2x=-1\qquad(i)}\\\\\\ \textsf{The first term is a square (x squared)}\\\\ \textsf{The second term is a product of 2, x and 1.} \end{array}$

$\large\begin{array}{l}\\\\\\ \textsf{We need to find a proper value for b, so that if we add it to}\\\textsf{the left side of the equation, we get a perfect square.}\\\\ \textsf{So,}\\\\ \begin{array}{cccccccccc} \mathsf{a^2}&\!\!\!+\!\!\!&\mathsf{2}&\!\!\!\cdot\!\!\!&\mathsf{a}&\!\!\!\cdot\!\!\!&\mathsf{b}&\!\!\!+\!\!\!&\mathsf{b^2}&=\mathsf{(a+b)^2}\\\\ \mathsf{\downarrow}&&&\!\!\!\!\!&\downarrow&\!\!\!\!\!&\downarrow&&\downarrow\\\\ \mathsf{x^2}&\!\!\!+\!\!\!&\mathsf{2}&\!\!\!\cdot\!\!\!&\mathsf{x}&\!\!\!\cdot\!\!\!&\mathsf{1}&\!\!\!+\!\!\!&\mathsf{1^2}&=\mathsf{(x+1)^2} \end{array}\\\\\\ \textsf{Just by comparing the expressions above, we can conclude that}\\\textsf{b must be equal to 1, so we get a perfect square:}\\\\ \mathsf{(x+1)^2=x^2+2x+1} \end{array}$

$\large\begin{array}{l}\\\\\\ \textsf{Back to (i), adding 1 to both sides:}\\\\ \mathsf{x^2+2x+1=-1+1}\\\\ \boxed{\begin{array}{c} \mathsf{(x+1)^2=0} \end{array}} \end{array}$

$\large\begin{array}{l}\\\\\\ \textsf{If you want to solve this equation for x, you will find}\\\\ \mathsf{x+1=0}\\\\ \mathsf{x=-1}\quad\longleftarrow\quad\textsf{(solution)} \end{array}$

If you're having problems understanding the answer, try seeing it through your browser: brainly.com/question/2112248

$\large\begin{array}{l} \textsf{Any doubt? Please, comment below.}\\\\\\ \textsf{Best regards! :-)} \end{array}$

6 0

3 years ago

Read 2 more answers

Item 11 In the table, Pattern A uses the rule "add 5" and Pattern B uses the rule "add 10." Pattern A 10 15 20 25 30 Pattern B 2

Elena L [17]

The Pattern B is the twice of the Pattern A. Then the correct option is C.

<h3>What is Algebra?</h3>

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

Item 11 In the table,

Pattern A uses the rule "add 5" and Pattern B uses the rule "add 10".

Pattern A 10 15 20 25 30

Pattern B 20 30 40 50 60

Then the Pattern B is the twice of the Pattern A.

Then the correct option is C.

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ1

7 0

2 years ago

CAN AN EXPERT HELP ME SOLVE THE AREA OF A KITE?? Ill give brainlest and points

Natali [406]

Answer:

20 cm2

Step-by-step explanation:

Area of the kite = (2 × small triangle) + (2 × large triangle)

= (2 × 0.5 × 2 × 2) + ( 2 × 0.5 × 2 × 8)

= 4 + 16

= 20 cm2

(The diaganals of the kite bisect each other at 90 degree)

5 0

3 years ago

What is the next term of the geometric sequence 32,16,8

asambeis [7]

32÷2=16
16÷2=8
8÷2=4
4÷2=2

5 0

3 years ago