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3 years ago

1. A bag has tiles with two-digit numbers (10-99) on them. A random tile is 4 points

Mathematics

2 answers:

Hunter-Best [27]3 years ago

4 0

Answer:

Correct option: Second one -> 1/90

Step-by-step explanation:

We have numbers from 10 to 99.

First we need to find how many numbers there are, and we can do that subtracting 99 from 10 and then we sum 1, as the values 10 and 99 are also included:

Number of tiles = 99 - 10 + 1 = 90

If we have 90 tiles, and only one of them has the value 32, the probability of drawing a 32 is:

P = 1/90

Correct option: Second one

stiks02 [169]3 years ago

3 0

Answer:

Step-by-step explanation:

The probabilty is defined as the ratio between the total events and the total outcomes possible.

In this case, we have 90 total outcomes, which are all two-digit numbers. The event is only one, the number 32. Using the definition, we have

$P=\frac{1}{90}$

Therefore, the right answer is B.

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Substitute the values for a, b, and c into b2 – 4ac to determine the discriminant. Which quadratic equations will have two real

hoa [83]

Answer: $0=2x^2-7x-9\\0=4x^2-3x-1\\0=x^2-2x-8$

Step-by-step explanation:

We know that the standard quadratic equation is ax^2+bx+c=0

Let's compare all the given equation to it and , find discriminant.

1. a=2, b= -7, c=-9

$b^2-4ac=(-7)^2-4(2)(-9)=49+72>0$

So it has 2 real number solutions.

2. a=1, b=-4, c=4

$b^2-4ac=(-4)^2-4(1)(4)=16-16=0$

So it has only 1 real number solution.

3. a=4, b=-3, c=-1

$b^2-4ac=(-3)^2-4(4)(-1)=9+16=25>0$

So it has 2 real number solutions.

4. a=1, b=-2, c=-8

$b^2-4ac=(-2)^2-4(1)(-8)=4+32=36>0$

So it has 2 real number solutions.

5. a=3, b=5, c=3

$b^2-4ac=(5)^2-4(3)(3)=25-36=-9$

Thus it does not has real solutions.

5 0

3 years ago

Read 2 more answers

Ted can wax a car in 20 minutes or wash a car in 60 minutes. tom can wax a car in 15 minutes or wash a car in 30 minutes. what i

o-na [289]

Well tom has a better chance of getting paid more than ted

3 0

3 years ago

Which function in vertex form is equivalent to f(x)=4+x^2-2x

morpeh [17]

F(x)=4-2x+x^2
=4-1+1-x-x+x^2
=3+(1-x) - x(1-x)
= 3+(1-x) (1-x)
= 3 + (1 - x)^2
f(x) = (1 - x)^2 + 3

5 0

4 years ago

Solve for x <br>3(x - 2) = 6x - 12<br>

nalin [4]

Answer:

The answer is 2

Step-by-step explanation:

Here's how I got it:

3(x - 2) = 6x - 12

Multiply 3 times x and 3 times 2, this is what you would get

3x - 6 = 6x - 12

Then, subtract the lowest x with the bigger X, this way you would have x on one side:

3x - 6 = 6x - 12

-3x -3x

This is what you should have after this:

-6 = 3x - 12

Now, to get the variable (letter that represents a number) by itself, you have to add 12 to both sides like this:

-6 = 3x - 12

+12 +12

You would get this:

6 = 3x

Finally, you have to get x by itself, so you have to divide 3 on both sides like this

6/3 = 3/3 x

That's why, your answer is 2

5 0

3 years ago

Please help me im really confused and i need an answer and how to do it!

Nutka1998 [239]

By solving the given equation of inequality " $4x+5 \geq 21$ ", we get " $x \geq 4$ ". A complete solution is below.

The given inequality equation is:

$4x+5 \geq 21$

By subtracting "5" from both sides of the above equation, we get

→ $4x+5 -5 \geq 21-5$

→ $4x\geq 16$

By applying cross-multiplication, we get

→ $x \geq \frac{16}{4}$

→ $x \geq 4$

Thus the answer above is the right one.

Learn more about inequality equation here:

brainly.com/question/12094806

8 0

3 years ago