Sam collects baseball cards. He gave 6 cards to his brother. He then got 4 new cards from his father. Sam now has 12 cards. How many baseball cards did he have before giving some to his brother

Answer:

x^2 - 4x + 5 = 0

Step-by-step explanation:

:)

x = (2 + i) and (2 - i) are the roots of the quadratic equation f(x) = x² - 4x + 5.

The values of variables satisfying the given quadratic equation are called its roots.

Given  (2 + i) and (2 - i) are roots of the quadratic equation.

Let the quadratic equation be f(x).

(x - (2 + i)) and (x - (2 -i)) are the factors of f(x).

Since, f(x) is a quadratic equation, it has only two roots.

f(x) = (x - (2 + i))(x - (2 - i))

f(x) = x² - (2 - i)x - (2 + i)x + (2 - i)(2 + i)

f(x) = x² - 2x + ix - 2x - ix + 4 - i²

f(x) = x² - 4x + 4 + 1

f(x) = x² - 4x + 5

Learn more about roots of quadratic equation here

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Answer:

Can not be determined

Step-by-step explanation:

In order to find the value of y for x = 4 you need to have a relation between x and y, which is not given. So you can't determine the value of y.

Answer:

C and D, x = 5

Step-by-step explanation:

To solve this problem, you add 9.2 to both sides then divide both sides by 5.5. The Addition Property of Equality states that if two expressions are equal to each other, and you add the same value to both sides of the equation, the equation will remain equal. This is the first step to solve the problem. The Division Property of Equality states that when we divide both sides of an equation by the same non-zero number, the two sides remain equal. That is the second step to solve the problem. To solve the problem, add 9.2 to both sides, that gets us 5.5x = 27.5. Now, we divide both sides by 5.5. That gets us x = 5.

Answer:

a. 16

Step-by-step explanation:

Consider these 3 values.

[tex] \sqrt{16} \\ \sqrt{27} \\ \sqrt{35} [/tex]

Factor 16,27 and 35.

[tex] \sqrt{4 \times 4} \\ \sqrt{3 \times 3 \times 3} \\ \sqrt{3 \times 3 \times 5} [/tex]

Pull out two same numbers out of the root.

[tex]4 \\ 3 \sqrt{3} \\ 3 \sqrt{5} [/tex]

Rational only when there are no square roots after simplify/evaluating.

Thus a. 16 is only rational here.

Answer:

1/2

Step-by-step explanation:

Or, 8(x-3)+7= 2x(4-17)

Or, 8x-24+7=2x(-13)

Or, 8x-17= -26x

Or, 34x=17

x=1/2

Answer:

Step-by-step explanation:

b/c there is a -5 we know that the line will pass through point (0,-5)  and we also want the line to pass through (-2,3) so use those two points to find the slope

m = 3-(-5) / -2 -0

m = 3+5 / -2

m =  -8/2

m = -4

Answer:

a = 1.8 cm

Step-by-step explanation:

Here. we want to find the value of a

To do this, we are going to use the sine rule

it states that the ratio of a side and the sine of the angle that faces the side is a constant for all the sides of a triangle

From the diagram, we have that;

The angle facing a is;

180-15-105 = 60

So, we have that

a/sin 60 = 2/sin 105

a = 2sin 60/sin 105

a = 1.794 cm

Answer:

y = 67 degrees

x = 86 degrees

z = 94 degrees

Step-by-step explanation:

This is easy...

38 + 56 = x

94

180 - 94 = 86

86 + 38 + 56 = 180

so x = 86 degrees

___________________

180 - 86 = 94

z = 94

___________________

94 + 19 = 113

180 - 113 = 67

67 + 94 + 19 = 180

so y = 67 degrees

Answer:96

Step-by-step explanation:

Answer:

x=2 or x= -2

Step-by-step explanation:

x^2 - 4 = 0

x ^2  − 4  +  4  =  0 + 4  

x^2 = 4

√ ( x ^2 ) = √ 4

=  ±  2  =  { x 1 = − 2

              x 2 = 2

Answer:

X=2 or X=-2

Step-by-step explanation:

x^2 - 4 = 0

x ^2  − 4  +  4  =  0 + 4  

x^2 = 4

√ ( x ^2 ) = √ 4

=  ±  2  =  { x 1 = − 2

             x 2 = 2

Answer:

[tex]\frac{2}{5} = \frac{8}{20} = \frac{4}{10} = \frac{16}{40} = 40\% = \frac{40}{100} [/tex]

hope this helps.

Answer:

54.48

Step-by-step explanation:

Answer:

54.48

Step-by-step explanation:

 68.1

x  0.8

54.48

Answer:

he spent 166 minutes baking pot pies in October

Answer:

12 is the slope and -4 is the y-intercept

Answer:

12 is the slope and -4 is the y-intercept

Step-by-step explanation:

1000*1.40=482892 algebra 6x+73=8228

Answer:

The fair had greater revenue from ticket sales on day 4 than on day 1.

Step-by-step explanation:

Answer: e?

Step-by-step explanation:

Answer:

28

Step-by-step explanation:

Answer: k=8

Step-by-step explanation:

k/2 = 4

k = 4 x 2

k = 8

Check: 8/2=4

Answer:

[tex]k=8[/tex]

Step-by-step explanation:

[tex]\frac{k}{2} = 4[/tex]

Multiply both sides by 2 to isolate k

[tex]\frac{k}{2}(2) = 4(2)\\k=8[/tex]

I hope this helps!

Answer:

2.5

Step-by-step explanation:

Answer:

it's answer is 4

Step-by-step explanation:

given

g(x) = - x + 1

g(-3) = -(-3) + 1

= 3 + 1

=4

Hope it will help you :)❤

Answer:

Substituting x= 2y-2 in 5x

5(2y-2)

10y-10

10(y-1)

all you have to do is replace the x with 2y-2

x=2y-2

5(2y-2)

10y-10

you can further factorise

10(y-1)

Answer:

x2−8x 7

Step-by-step explanation:

Answer:

The answer would be -4

Step-by-step explanation:

If you think about it like -7+3 it can help you figure out what sign to use :)

Answer:

x is anything greater than -12

Step-by-step explanation:

Answer:

1.5

Step-by-step explanation:

Answer: 1.5 hope this helps if you Wana know how I got that then mark me brainest

Step-by-step explanation:

Answer:

The number is 400

Step-by-step explanation:

10 percent of 400 would be 40 because you divide by 10

Answer:

106

Explain how you found your answer:

Answer:

A)10

Step-by-step explanation:

hope it helps u