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Juli2301 [7.4K]
3 years ago
15

I need help with geometry question!

Mathematics
1 answer:
vovangra [49]3 years ago
8 0
36=2x-4 so add 4 to each side to get 40=2x then you divide each side by 2 to get 20=x
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I have k quarters, five less quarters than nickels and one more than twice as many dimes as quarters. Find the value of the coin
Alenkinab [10]

Answer:

(35k + 20) cents

Step-by-step explanation:

First of all, let us have the value of each unit:

1 quarter = 25 cents

1 nickel = 5 cents

1 dime = 10 cents

Given that number of quarter = k

Quarters are 5 lesser than Nickels, so number of nickels = k+5

One more than twice as many dimes as quarters:

k = 2 \times Number of Dimes + 1

So, number of dimes = \frac{1}{2}(k-1)

Value of quarters = 25 \times k cents

Value of nickels = 5 \times (k+5) = (5k+25)\ cents

Value of dimes = \frac{1}{2}(k-1) \times 10 = (5k-5)\ cents

So, total value of coins =

25k + 5k +25 +5k-5\\\Rightarrow (35k+20)\ cents

5 0
3 years ago
Read 2 more answers
What is the simplest form of 4 square root 81x^8y^5?
olasank [31]
Firstly,
thanks for posting this.

81 = 9x9 or 9 squared so at this stage I'm guessing the last two. 
x^ 8 = (x^ 4) x (x^ 2) (its called the multiplication rule of indices). 
Okay I have approx 14 mins to answer.
No panic
√ 81.x^8 x <span>√ y^5
</span>√ (9x^2 x 9x^6) x <span>√ y^5
</span>= 9x x <span>√ 9x^6 x  </span><span>√ y^5
</span>did I just gain time?
√ 9x^6 = <span>√ </span>3x ^3 x <span>√ 3x ^ 3
</span>or 2 . √ 3x^3. <span>√ y^5
</span>more time
okay, so that wasnt successful. 
√ 9x^6 =<span>√ </span> (3x^2) x <span>√ </span>(3x^4)




5 0
3 years ago
Favorite radio station has this hourly
IceJOKER [234]
P(n)=news time/total time 

We are told that the news is 14 minutes long during an hour so

p(n)=14/60

p(n)=7/30
7 0
3 years ago
Mark buys last year's best-selling novel, in hardcover, for $23.20. This is with a 20% discount from the original price. What wa
Gelneren [198K]

Answer:

29

Step-by-step explanation:

Let x be the original price.

( 1 - 20% ) x = 23.2

0.8x = 23.2

\frac{0.8x}{0.8}  =  \frac{23.2}{0.8}

x = 29

8 0
3 years ago
A standard shower drain
Hunter-Best [27]

Answer:

see the explanation

Step-by-step explanation:

The given rate is

480\ \frac{gal}{h}

Create three different rates, that are all  equivalent to this rate

<u>First rate </u>

1,440 gallons in 3 hours

Find the units rate

Divide the total volume by the total time

\frac{1,440}{3}=480\ \frac{gal}{h}

<u>Second rate </u>

960 gallons in 120 minutes

Find the units rate

Divide the total volume by the total time

Convert minutes to hours

120 \ min=2\ h

\frac{960}{2}=480\ \frac{gal}{h}

<u>Third rate </u>

720 gallons in 1.5 hours

Find the units rate

Divide the total volume by the total time

\frac{720}{1.5}=480\ \frac{gal}{h}

<em>Convert gal/h to gal/min</em>

Remember that

1\ h=60\ min

480\ \frac{gal}{h}=480/60=8\ \frac{gal}{min}

3 0
3 years ago
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