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spin [16.1K]
3 years ago
9

Help fgyugyruyvuryfryvseycfyrbseutgbvheryyyaduiik

Mathematics
1 answer:
Kisachek [45]3 years ago
3 0

Answer:you have to divide

Step-by-step explanation:

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A coin bank that excepts only nickels and dimes contains $9.15. There are three more than twice as many nickels as there are dim
valentinak56 [21]

45 dimes and 93 nickels were in bank

<em><u>Solution:</u></em>

Let "n" be the number of nickels

Let "d" be the number of dimes

We know that,

value of 1 nickel = $ 0.05

value of 1 dime = $ 0.10

<em><u>Given that There are three more than twice as many nickels as there are dimes</u></em>

Number of nickels = 3 + 2(number of dimes)

n = 3 + 2d ---- eqn 1

<em><u>Also given that coin bank that excepts only nickels and dimes contains $9.15</u></em>

number of nickels x value of 1 nickel + number of dimes x value of 1 dime = 9.15

n \times 0.05 + d \times 0.10 = 9.15

0.05n + 0.10d = 9.15  ---- eqn 2

<em><u>Let us solve eqn 1 and eqn 2</u></em>

Substitute eqn 1 in eqn 2

0.05(3 + 2d) + 0.10d = 9.15

0.15 + 0.1d + 0.10d = 9.15

0.2d = 9

<h3>d = 45</h3>

From eqn 1

n = 3 + 2(45)

n = 3 + 90 = 93

<h3>n = 93</h3>

Thus 45 dimes and 93 nickels were in bank

3 0
3 years ago
I'm giving 50 points and brainliest answer to whoever can answer this... Please show your work so I can try to understand it xD
Oksana_A [137]
Ok, to solve this first you have to set up your proportion:

9/150=x/230

/ is a fraction

x= the number of vials it will take to treat 230 patients

in order to solve this, you have to cross multiply:

9 x 230= 2070

150 · x= 150x

so you get 150x=2070

then divide 2070 by 150

2070/150= 13.8

so it would take 13.8 vials of medicine to treat 230 patients
7 0
3 years ago
Read 2 more answers
What is the value of s in the equation 4(2s − 1) = 7s + 12? (4 points)
notka56 [123]

Answer:

B) 16

8s-4=7s+12

s-4=12

s=16

3 0
3 years ago
Read 2 more answers
Find the area of the shaded region.
Mariana [72]

Answer:

its C

Step-by-step explanation:

6 0
2 years ago
What is the area of the trapezoid shown below?<br> 2<br> 15<br> 12<br><br> help fast please!!!
Ugo [173]

Answer:

78 units2

Step-by-step explanation:

The Area of the triangle is 54 units2

The rectangle on the side has an area of 24 units2.

Add them together, and you get 78.

I hope this helps!

pls ❤ and give brainliest pls

7 0
2 years ago
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