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3 years ago

Using the least common denominator rename 3/5 and 11/20?

Mathematics

2 answers:

svlad2 [7]3 years ago

8 0

LCD is 20
3/5-> 12/20
11/20-> 11/20

irina1246 [14]3 years ago

3 0

Answer:

12/20 and 11/20.

Step-by-step explanation:

The least common denominator between 3/5 and 11/20 is 20.

For the first equation, we multiple the numerator and denominator by 4 and we get 12/20.

The second equation already has a denominator of 11/20 so we can leave it as is.

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Joe earns $14 an hour and Blaine earns $18 per hour. Joe receives a raise of $1.75 every six months, and Blaine receives a raise

Katarina [22]

After 4 interval of six months, Joe to earn same hourly rate as Blaine

Solution:

Given that,

Amount earned by Joe = $ 14 per hour

Amount earned by Blaine = $ 18 per hour

Lets assume the number of six month intervals be "x"

Joe receives a raise of $1.75 every six months

Therefore,

Joe earning: 14 + 1.75(number of six month intervals)

Equation for Joe earning: 14 + 1.75x ------- eqn 1

Blaine receives a raise of $0.75 every six months

Therefore,

Blaine earning: 18 + 0.75(number of six month intervals)

Equation for Blaine earning: 18 + 0.75x ------------ eqn 2

The number of six-month intervals it will take Joe to earn the same hourly rate as Blaine,

Eqn 1 must be equal to eqn 2

$14+1.75x = 18+0.75x\\\\1.75x-0.75x = 18-14\\\\1x = 4\\\\x = 4$

Thus after 4 interval of six months, Joe to earn same hourly rate as Blaine.

8 0

3 years ago

Molar mass of FeCl3, Co(NO3)2, C4H10O, and Cu(NO3)2? Show work.

N76 [4]

Molar mass of FeCl₃ 162.204 g/mol

Molar mass of C₄H₁₀O is 74.1212 g/mol

Molar mass of Cu(NO₃)₂ is 187.5594 g/mol

Step-by-step explanation:

Molar mass is also termed as molecular mass of the compound. So it is the measure of the amount of mass present in the given molecule. It can be obtained by adding the products of number of atoms with their molecular mass.

For example, in order to find the molar mass of FeCl₃, the molecular mass of Fe is noted as 55.845 g/mol and the molecular mass of Cl is noted as 35.453 g/mol.

As FeCl₃ contains one atom of Fe and 3 atoms of Cl, then the

Molar mass = (Number of Fe atoms × Molecular mass of Fe) + ( Number of Cl atoms × Molecular mass of Cl)

Molar mass of FeCl₃ = (1×55.845)+(3×35.453)=162.204 g/mol.

Similarly, the molar mass of C₄H₁₀O will be

Molar mass = (4×Mass of C) + (10×Mass of H) + (1 × Mass of O)

Molar mass = (4×12.0107)+(10×1.00784)+(1×16)=74.1212 g/mol

Then the molar mass of Cu(NO₃)₂ will be

Molar mass = (1× Mass of Cu) + (2×Mass of N)+(6×Mas of Oxygen)

Molar mass = (1×63.546)+(2×14.0067)+(6×16)

Molar mass = 187.5594 g/mol

5 0

3 years ago

Seven-eighths minus five-twelfths

Elenna [48]

The answer to your question is A, 11/24

5 0

3 years ago

Read 2 more answers

20 points! I need help! I will also be doing a 50 point giveaway later!

Naddik [55]

Answer:

3. 156 / 0.2 = $780

4. 9.75 / 0.25 = $39

Step-by-step explanation:

I hope this helped :)

3 0

3 years ago

Read 2 more answers

I will give 10 paypal if answered correctly

Reika [66]

Answer:

1) x = 3

y = 42

2) x = 50

y = 70

Step-by-step explanation:

1) 12x + 6 = 14x

6 = 2x

x = 3

14(3) = y

42 = y

2) 2x + 10 + x + 20 = 180

3x + 30 =180

3x= 150

x=50

2(50)+10=110

110-180

y=70

4 0

3 years ago