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3 years ago

How do you solve k/2+9=30

Mathematics

2 answers:

Andrews [41]3 years ago

6 0

K/2+9=30 -9 -9 k/2=21 *2 *2 k=42

Mrrafil [7]3 years ago

4 0

If you would like to solve the equation k / 2 + 9 = 30, you can calculate this using the following steps:

k / 2 + 9 = 30
k / 2 = 30 - 9
k / 2 = 21 /*2
k = 21 * 2
k = 42

The result is 42.

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Mice21 [21]

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3 years ago

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Question 10 of 21

PSYCHO15rus [73]

<u>ANSWER</u>

A. (4,12)

<u>EXPLANATION</u>

The equations are:

$10x +2y = 64...(1)$

and

$3x - 4y = -36...(2)$

To eliminate a variable we make the coefficients of that variable the same in both equations.

It is easier to eliminate x.

We multiply the first equation by 2 to get:

$20x + 4y = 128...(3)$

We add equations (2) and (3).

$3x + 20x + 4y - 4y = - 36 + 128$

$23x = 92$

Divide both sides by 23

$\frac{23x}{23} = \frac{92}{23}$

$x = 4$

Put x=4 into equation (1).

$10(4)+2y = 64$

$40+2y = 64$

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The solution is (4,12)

6 0

3 years ago

A drama class has a total of 40 students. The number of males is 6 more than the number of females. How many males and how many

Lady_Fox [76]

Answer:

Females = 17 and males = 23

Step-by-step explanation:

Given that,

Total no of students in the class = 40

Let no. of females = x

No. of males = 6+x

ATQ,

Total students = males + females

40 = x+6+x

40-6 = 2x

34 = 2x

x = 17

Hence, there are 17 females and (6+17= 23) males.

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3 years ago

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Tamiku [17]

I hope this helps you

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3 years ago

Need help ASAP!!!!!!!

natima [27]

Answer:

Step-by-step explanation:

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3 years ago

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