5 - k ÷ 3/5 k = 1/4 I need this answer for my assignment

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

3/5*k+1/5*k-(4)=0

Step by step solution :

STEP

1

:

1

Simplify —

5

Equation at the end of step

1

:

3 1

((— • k) + (— • k)) - 4 = 0

5 5

STEP

2

:

3

Simplify —

5

Equation at the end of step

2

:

3 k

((— • k) + —) - 4 = 0

5 5

STEP

3

:

Adding fractions which have a common denominator :

3.1 Adding fractions which have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

3k + k 4k

—————— = ——

5 5

Equation at the end of step

3

:

4k

—— - 4 = 0

5

STEP

4

:

Rewriting the whole as an Equivalent Fraction :

4.1 Subtracting a whole from a fraction

Rewrite the whole as a fraction using 5 as the denominator :

4 4 • 5

4 = — = —————

1 5

Equivalent fraction : The fraction thus generated looks different but has the same value as the whole

Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator

Adding fractions that have a common denominator :

4.2 Adding up the two equivalent fractions

Add the two equivalent fractions which now have a common denominator

Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:

4k - (4 • 5) 4k - 20

———————————— = ———————

5 5

STEP

5

:

Pulling out like terms :

5.1 Pull out like factors :

4k - 20 = 4 • (k - 5)

Equation at the end of step

5

:

4 • (k - 5)

——————————— = 0

5

STEP

6

:

When a fraction equals zero :

6.1 When a fraction equals zero ...

Where a fraction equals zero, its numerator, the part which is above the fraction line, must equal zero.

Now,to get rid of the denominator, Tiger multiplys both sides of the equation by the denominator.

Here's how:

4•(k-5)

——————— • 5 = 0 • 5

5

Now, on the left hand side, the 5 cancels out the denominator, while, on the right hand side, zero times anything is still zero.

The equation now takes the shape :

4 • (k-5) = 0

Equations which are never true:

6.2 Solve : 4 = 0

This equation has no solution.

A a non-zero constant never equals zero.

Solving a Single Variable Equation:

6.3 Solve : k-5 = 0

Add 5 to both sides of the equation :

k = 5

K1 = - square root 285/10 , K2 = + sqare root 285/10

Step-by-step explanation:

the forst and 3rd

step-by-step explanation:

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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