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3 years ago

How many solutions does

Mathematics

1 answer:

Natalija [7]3 years ago

3 0

$3(4x - 2) = 12x \\ 12x - 6 = 12x \\ 12x - 12x = 6 \\ 0 = 6$
The answer is no solution

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Select the correct answer from each drop-down menu.

erik [133]

Answer:

Grades 6 and 8

Step-by-step explanation:

If the relationship of girls to boys in two different grades are proportional, they must have the same ratio. To tackle this problem, we can find the ratios of genders in each grade and compare them.

Step 1, finding ratios:

Finding ratios is just like simplifying fractions. We will reduce the numbers by their greatest common factors.

GRADE 6:

$9:12=\\3:4$

GRADE 7:

$12:18=\\2:3$

GRADE 8:

$15:20=\\3:4$

GRADE 9:

$25:36$

Can't be simplified!

Step 2:

Notice how grades 6 and 8 both had a ratio of 3:4. We can conclude that these two grades have a proportional relationship between girls and boys.

I hope this helps! Let me know if you have any questions :)

8 0

3 years ago

If h=5, then 6h-4 equals

Dovator [93]

6h-4

1. Substitute 5 for h
6(5)-4
30-4 =26

8 0

3 years ago

What is the mean of variable a piz help me i have one more question

timama [110]

I think the mean of variable a is 4

4 0

3 years ago

PLEASE HELP ME WITH THIS QUESTION. please and thank you

Ahat [919]

Associative property moves the parenthesis

Choice B

6 0

3 years ago

PLEASE HELP ME NOW URGENT

timama [110]

ANSWER

$y = 3 \pm \sqrt{21}$

EXPLANATION

The quadratic equation is:

${y}^{2} - 6y - 12 = 0$

Group variable terms:

${y}^{2} - 6y = 12$

Add the square of half, the coefficient of y to both sides.

${y}^{2} - 6y + ( - 3) ^{2} = 12 + ( - 3) ^{2}$

${y}^{2} - 6y + 9= 12 + 9$

The LHS us now a perfect square trinomial:

${(y - 3)}^{2}= 21$

Take square root:

$y - 3 = \pm \sqrt{21}$

$y = 3 \pm \sqrt{21}$

The first choice is correct.

8 0

3 years ago

Read 2 more answers