solve using the quadratic formula: 2x^2+5x+9=0

Answer:

ty can buy 7 journals

Step-by-step explanation:

Answer:

7 Journals

Step-by-step explanation:

$30-$9=$21

$21/$3=7

Answer:

Step-by-step explanation:

here is SOH CAH TOA is  a from to copy and paste into your computer for use for all trig function  problems.  Yes, I mean save the below for use later.

Use SOH CAH TOA to recall how the trig functions fit on a triangle

SOH: Sin(Ф)= Opp / Hyp

CAH: Cos(Ф)= Adj / Hyp

TOA: Tan(Ф) = Opp / Adj

now figure out what parts you know and what you want to find, and see which one fits that purpose.

we are given the two legs of the triangle and want to find the hypotenuse. so we don't really need SOH CAH TOA, here,  Pythagoras will come to the rescue.   but still copy the above SOH CAH TOA for use when you will need it.

Pythagoras :   [tex]C^{2}[/tex] = [tex]A^{2}[/tex] + [tex]B^{2}[/tex]

where A = 15 and B = 10

 [tex]C^{2}[/tex]  = [tex]15^{2}[/tex] + [tex]10^{2}[/tex]

[tex]C^{2}[/tex]  = 325

C = [tex]\sqrt{325}[/tex]

C = 18.02775638

This is the Step-by-step explanation:

Allow a random number generator to come up with 100 families within a 50 radius of the amusement park.

A random number selector can be used to select 100 families out of the total number of families living within a 50 mile radius of the amusement park.

Random sampling refers to the process of randomly selecting a set of samples from a population in random manner without bias.

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Answer:

The 2nd one.

(2nd one on the top, to the right of YOUR screen)

Answer:

The 1st you show is an expositional decay.

Step-by-step explanation:

If you notice it is a declining power of 2

y = 2**(5-x) which is nonlinear

The 2nd is an arithmetic decline (constant decline) and the 3rd is a geometiric decline (constant ratio).

Answer:

cjxbdjd xkdnkdkdns xkdnskzkns xkdnd d d d d d d d. d d dd d d d d. d d d d d d d d d d dd. d d

false because when u connect the dots it does not make a straight line that goes thru the origin

Answer:

false

Step-by-step explanation:

Answer:

Step-by-step explanation:

95.9

The probability of flipping a coin 85 times and getting tails 50 times or fewer 99.8%, the correct option is B

Probability refers to a possibility that deals with the occurrence of random events.

The probability of all the events occurring need to be 1.

The formula of probability is defined as the ratio of a number of favorable outcomes to the total number of outcomes.

P(E) = Number of favorable outcomes / total number of outcomes

We are given that;

The coin is flipped 85 times

Now,

The probability of flipping a coin and getting tails on any single flip is 0.5 (assuming it's a fair coin). We can model this scenario using a binomial distribution, where:

n = 85 (the number of coin flips)

p = 0.5 (the probability of getting tails on any single flip)

x = 50 (the maximum number of tails we want to allow)

We want to find the probability of getting 50 tails or fewer, so we need to calculate the cumulative probability of the binomial distribution up to x = 50. We can use a binomial probability calculator or a spreadsheet program to do this calculation.

Using a binomial probability calculator, we get:

P(X ≤ 50) = 99.8%

Therefore, the probability will be 99.8%.

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Answer:

This isn't really a math problem since there aren't many numbers or variables provided to create an equation. So Chelsea can complete her homework in any order of her choice, but I would say that she should complete the homework that's due first before moving onto the more recent homework that was given.

Answer:

A y= -2/3x+10

Step-by-step explanation:

___________

Answer:

A. y=-2/3x+10

Step-by-step explanation:

...........

Answer:

c

my-step explanation:

Khan acadimy

The inequality that represents the following graph is C. x > -4

Inequality is defined as the relation which makes a non-equal comparison between two given functions.

An inequality is a mathematical statement which compares two values or expressions using a relational operator, such as less than (<), greater than (>), less than or equal to (≤), greater than or equal to (≥), or not equal to (≠). Inequalities are used to show relationships between quantities or to express constraints or conditions.

The inequality that represents the graph;

x > -4x>−4x, is greater than, minus, 4

x > -4

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Answer:

x = 90

Step-by-step explanation:

This will add up to 360 degrees in total

90 + 90 + 90 + 90 = 360 therefore x = 90 Hope that helps!

Answer:

option 3

Step-by-step explanation:

[tex]volume = \frac{1}{3} \pi r^2 h = \frac{1}{3} \times 3.14 \times 2^2 \times 24[/tex]

Answer:

A, because x>3 or x<-4

Answer: D is the answer.

-4 < x < 3

Step-by-step explanation:

5x-2>-22 and 6x - 7 < 11

5x > -20 and 6x < 18

x > -4 and x < 3

Rearrange: -4 < x < 3 answer choice D

Answer:

2/1 a

Step-by-step explanation:

Answer:

X=15ft

Step-by-step explanation:

17²-8²=225

[tex] \sqrt{225} [/tex]

=15

Answer:

1,23

Step-by-step explanation:

3,24+3,35=6,59

6,59-5,36=1,23

Answer:

I think the answer is around 24 to 25 dollars.

Bella paid a total amount of $13.49.

To determine the quantity or percentage of something in terms of 100, use the percentage formula. Per cent simply means one in a hundred. Using the percentage formula, a number between 0 and 1 can be expressed. A number that is expressed as a fraction of 100 is what it is. It is mostly used to compare and determine ratios and is represented by the symbol %.

We have,

Bella ordered a $6 smoothie.

Sales tax = 9%

So, amount after tax

= 6 + 9% of 6

= $6.54

and, tip= 15%

Amount after tip

= 6 + 0.15 x 6

= $6.9

Thus, Bella paid

= 6.54 + 6.9

= $13.49

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Answer:

need help too

Step-by-step explanation:

Answer:

6.9

Step-by-step explanation:

I will use cross-multiplication for this problem:

[tex]\frac{4}{7} =\frac{x}{12} \\\\7x=48\\\\x=\frac{48}{7} \\\\x=6.857[/tex]

Rounded to tenths:

6.9

Answer:

110 cm²

Step-by-step explanation:

17 · 8

136 cm²

4 · 1.5

6 cm²

5 · 4

20 cm²

20 cm² + 6 cm²

26 cm²

136 cm² - 26 cm²

110 cm²

Answer:

x=16

Step-by-step explanation:

   0.4(2x+12) = 3(0.2x -2) -4

[tex]Or,0.8x+4.8=0.6x+12-4\\Or, 0.8x0.6x=8-4.8\\Or,0.2x=3.2\\Or,x=\frac{3.2}{0.2} \\Ot,x=\frac{32}{2} \\Or,x=16[/tex]

Answer:

4-36 = -32

-32 + 180 = 148

Therefore | x = 148

I hope I helped! :)

Answer:

148

Step-by-step explanation:

=> -32=x-180

=> -32+180=x

=> 148=x

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Answer:

the probability that the song should be played on accurately  3 days out of 5 days is 0.051

Step-by-step explanation:

Given that

The probability that a particular song is played is 1 by 5

We need to find out the probability that the song should be played on accurately  3 days out of 5 days

So,

[tex]P(x = 3) = \frac{5!}{3! (5 - 3)!} (\frac{1}{5})^3(1 - \frac{1}{5})^{5-3}[/tex]

= 0.051

Hence, the probability that the song should be played on accurately  3 days out of 5 days is 0.051

The same is considered

Answer:

4

Step-by-step explanation:

5 smiles - 1 = 4 smiles

Answer:

I think there are still 5 smiles. I dont know

Explanation:

4. 81

5. 11

6. 9

Answer:

Answer:

Length of leg of triangle =  

Step-by-step explanation:

We are given a 45°-45°-90° triangle with hypotenuse measuring 18 cm.

Let us assume the following labeling of the diagram, as attached in the answer area.

The two angles here are equal to 45° so two sides of the triangle opposite to the equal angles will also be equal to each other i.e. it is an isosceles triangle.

i.e. The sides XY and YZ will be equal.

Let XY = YZ = x cm

It is known that in a right angled triangle, pythagorean theorem holds well.

As per pythagoream theorem:

Putting the values:

So, the length of leg of triangle =

Step-by-step explanation:

Answer:

it's already in the hundredths place

Step-by-step explanation:

.1 <- tens place

.01<- hundredths place

.001<-thousands place