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ella [17]
3 years ago
12

Need help. Please show work.

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
5 0

Answer:

See below     PLEASE GIVE BRAINLIEST

Step-by-step explanation:

5(x -3) - x =                                        

5x - 15 -x =

5x - x - 15 =

4x - 15 =

4x = 15

x = 15 ÷ 4

x = 3.75                                     5(3.75 - 3) - x = 18.75 - 15 - 3.75 = 0

                                                 

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Nolan has some nickels and some dimes. He has no more than 19 coins worth no less than $1.30 combined. If Nolan has 5 nickels, d
Allushta [10]

Answer:

number of dimes 11 to 14

Step-by-step explanation:

given data

coin = 19

worth no less = $1.30

Nolan nickles = 5

solution

we convert 5 cent to dollars, it will be

5÷100 = $0.05

and

dime is worth 10 cents

so it will be 10 ÷ 100 = $0.1

so we consider here x as the number when nickels.

and we consider y as the number of dimes.

so here we can say

x + y ≤ 19      ..........................1

as here no less than $1.30 combined.

so

0.05 x + 0.1 y ≥ 1.3       ......................2

and

when Nolan has 5 nickels

put x = 5 in eq 1

5 + y ≤ 19  

y ≤ 19 - 5

y ≤ 14

and

now we put x = 5 in eq 2

0.05 × 5 + 0.1y ≥ 1.3

0.25 + 0.1y ≥ 1.3

0.1y ≥ 1.3 - 0.25

0.1y ≥ 1.05

y ≥ 10.5

so all possible values for the number of dimes 11 to 14

7 0
3 years ago
The radius of a nitrogen atom is 5.6 × 10^-11 meters, and the radius of a beryllium atom is 1.12 × 10^-10 meters. Which atom has
Airida [17]
The answer is Beryllium atom has a larger radius by 2 times.

Nitrogen atom: 5.6 × 10⁻¹¹ = 5.6 × 10⁻¹⁻¹⁰ = 5.6 × 10⁻¹ × 10⁻¹⁰ = 0.56 × 10⁻¹⁰
Beryllium atom: 1.12 × 10⁻¹⁰

Since 1.12 is bigger than 0.56, then the radius of beryllium atom is larger of the radius of nitrogen atom. Let's see by how many times:
1.12 × 10⁻¹⁰ : 0.56 × 10⁻¹⁰ = 1.12 : 0.56 = 2

4 0
3 years ago
How to classify a system and give the number of solutions
Leokris [45]
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3) dependent system. equations have same slope and y-intercept(same line)independent system.

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im not sure if thats what you were looking for

3 0
3 years ago
Make y the subject of the formula <br><br> W= x squared - 2yz
AveGali [126]

Answer:

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Step-by-step explanation:

<em><u>Explanation</u></em>

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Dividing '2z' on both sides , we get

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Delvig [45]

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plz hit that thanks button <3

Step-by-step explanation:


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