All categories

3 years ago

Will #9-10 be a vertical line and #11-12 a horizontal line?

Mathematics

1 answer:

allsm [11]3 years ago

5 0

Yes.

y always goes in y-axis and same with x-axis. So, they never intersect w/ each other.

Mark me as brainliest? Hope it helps!

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51 is 75% of what number?

Julli [10]

51 75%
_____ =______
X 100

75x=5100
_________
75

X=68

4 0

3 years ago

The first step for deriving the quadratic formula from the quadratic equation, 0 = ax2 bx c, is shown.step 1: –c = ax2 bxwhich b

Ksju [112]

Answer:

option (b) is correct.

First step to solve for deriving the quadratic formula from the quadratic equation is completing the square.

Step-by-step explanation:

Given : the quadratic equation $ax^2+bx+c=0$

We have to find the first step for deriving the quadratic formula from the quadratic equation.

Quadratic formula is given by $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Consider the given quadratic equation $ax^2+bx+c=0$

Divide the equation by a, we get,

$x^2+\frac{b}{a}x+\frac{c}{a}=0$

Take $\frac{c}{a}$ to other side, we get,

$x^2+\frac{b}{a}x=-\frac{c}{a}$

Add $(\frac{b}{2a})^2$ to both side, we get,

$x^2+\frac{b}{a}x+(\frac{b}{2a})^2=(\frac{b}{2a})^2-\frac{c}{a}$

Thus, the left side is in the form of $(a+b)^2=a^2+b^2+2ab$

On solving, we get,

$(x+\frac{b}{2a})^2=(\frac{b}{2a})^2-\frac{c}{a}$

Then solve for x , we get quadratic formula $\frac{-b\pm\sqrt{b^2-4ac}}{2a}$

Thus, first step to solve for deriving the quadratic formula from the quadratic equation is completing the square.

Thus, option (b) is correct.

3 0

3 years ago

Read 2 more answers

Whats the value of x in 3x+9=44-2x

elena-14-01-66 [18.8K]

$3x+9=44-2x\ \ | \ add\ 2x\ to\ both\ sides \\\\5x+9=44\ \ |\ subtract\ 9\ to\ both\ sides \\\\5x=35 \ \ | \ divide \ both \ sides\ by\ 5 \\\\x=7$

6 0

3 years ago

Read 2 more answers

7(x+4) for x=5<br><br>please answer asap<br>don't answer if you absulutly don't know

Nikolay [14]

So plug in the 5 for x. it would look like 7(5+4). you do PEMDAS and then looks like 7(9) and 7 multiplied by 9 equals 63.

3 0

3 years ago

Hannah estimated that a bottle could hold 2.2 liters. The actual volume of the bottle was 2 litters. What was the percent error

MrRa [10]

Answer:

I dont have a direct answer but i think i can help.

Step-by-step explanation:

For example, 2%, read "percent", is two every hundred. When we have 100 liters of water, 2% is 2 liters. If we have 200 liters of water, then 2% is 4 liters. Converting a percentage into a fraction can be done by dividing by 100, following the definition of a percentage.

4 0

3 years ago