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Vedmedyk [2.9K]
3 years ago
14

Bob has $25 to spend on the school field trip after paying $14 for the cost of the field trip and $5.25 for lunch how much will

she have left
Mathematics
2 answers:
Ganezh [65]3 years ago
4 0
$5. 75 is the amount of money Bob will have left.
Dvinal [7]3 years ago
4 0
That would 25 - (14+5.25)
= 25 - 19.25
= 5.75 dollars left


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A supplier delivers an order for 20 electric toothbrushes to a store. By accident, three of the electric toothbrushes are defect
Vladimir79 [104]

The probability that the first two electric toothbrushes sold are defective is 0.016.

The probability of an event, say E occurring is:

P(E)=\frac{n(E)}{N}

Here,

n (E) = favorable outcomes

N = total number of outcomes

Let X = the number of defective electric toothbrushes sold.

The number of electric toothbrushes that were delivered to a store is n = 20.

The number of defective electric toothbrushes is x = 3.

The number of ways to select two toothbrushes to sell from the 20 toothbrushes is:

(\left {{20} \atop {2}} \right. )=\frac{20!}{2!(20-2)!} =\frac{20!}{2!18!} =\frac{20*19*18!}{2!*18!} = 190

The number of ways to select two defective toothbrushes to sell from the 3 defective toothbrushes is:

(\left {{3} \atop {2}} \right. )=\frac{3!}{2!(3-2)!} =\frac{3!}{2!1!} =\frac{3*2!}{1!2!} =3

Compute the probability that the first two electric toothbrushes sold are defective as follows:

P (Selling 2 defective toothbrushes) = Favorable outcomes ÷ Total no. of outcomes

\frac{3}{190}\\ =0.01579\\=0.016

Thus, the probability that the first two electric toothbrushes sold are defective is 0.016.

Learn more about probability here brainly.com/question/27474070

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4 0
2 years ago
Simplify: (ax+2)(ax+b)(b)0
Lina20 [59]
0 anything multiplied by Zero is zero
6 0
3 years ago
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86,678 rounded the nearest ten thousand
Sunny_sXe [5.5K]
90,000 is the answer. have a great day!!
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3 years ago
6 + n = 22 ; n = 8 please show the given value is a slolution of the equation
Mariana [72]

Answer: if n = 8 then the equation is false because 6+8 = 14 but on the equation, it shows 6+8 = 22, which is false

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2 years ago
Theresa and her brother, Ruben, are getting phones that each have 32 gigabytes of storage. How many bits of storage come with ea
Ilia_Sergeevich [38]

Answer:

Step-by-step explanation:

welp 32 divided by 2 is 16 soooooo

if you need it to be a scientific notation i gootchuuu

steps

1.)a×10n.

2.)to write it in it's original form you have to multiply it by 10 = 10^1.

3.)⇒16=1.6×101.

basically its the power is gonna be positive which is just 1

and you move left one time and your answer is just 1.6^1

3 0
3 years ago
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