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3 years ago

12

a certain number of quartersz five times as many pennies as quarters, and 12 more dimes than quarters are worth 8.00. dollars ho

w many of each coins are there

2 answers:

Naya [18.7K]3 years ago

7 0

5... I'm guessing and just trying to get credit lol

Andrej [43]3 years ago

3 0

Answer:

Step-by-step explanation:

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Plz help,its really easy:its mapping diagrams,fill in the blanks

posledela

Answer:

2->72

3->71

4 is the missing x value

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3 years ago

Evaluate C_n.xP^xQn-x For the given n=7, x=2, p=1/2

r-ruslan [8.4K]

Answer:

The value of given expression is $\frac{21}{128}$ .

Step-by-step explanation:

Given information: n=7, x=2, p=1/2

$q=1-p=1-\frac{1}{2}=\frac{1}{2}$

The given expression is

$C(n,x)p^xq^{n-x}$

It can be written as

$^nC_xp^xq^{n-x}$

Substitute n=7, x=2, p=1/2 and q=1/2 in the above formula.

$^7C_2(\frac{1}{2})^2(\frac{1}{2})^{7-2}$

$\frac{7!}{2!(7-2)!}(\frac{1}{2})^2(\frac{1}{2})^{5}$

$\frac{7!}{2!5!}(\frac{1}{2})^{2+5}$

$\frac{7\times 6\times 5!}{2\times 5!}(\frac{1}{2})^{2+5}$

$21(\frac{1}{2})^{7}$

$\frac{21}{128}$

Therefore the value of given expression is $\frac{21}{128}$ .

7 0

3 years ago

Simplify the expressions. show your work. 3x(4x4 – 5x)

hammer [34]

3x(4x4 – 5x)
= 12x^5-15x^2

3 0

3 years ago

Read 2 more answers

BRAINLIEST+STARS

Evgen [1.6K]

Answeri really cant see the bottom answers can you take a new picutre

Step-by-step explanation:

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2 years ago

Help me pleaseee! <br><br> Solve for BC:

Marrrta [24]

Answer:

21

Step-by-step explanation:

Since this is an equilateral triangle, all sides are equal.

3x-6 = 2x+3

Move like terms to one side

x = 9

Now we plug 9 back in for x

2(9) + 3

=18 + 3

=21

8 0

2 years ago

Read 2 more answers