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3 years ago

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Mathematics

1 answer:

GalinKa [24]3 years ago

6 0

Answer:

36 votes

(2x7)-(3x1) Take each instruction separately, use brackets to separate their action More

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A store recorded the number of sweatshirts sold on several days throughout the year. The

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Answer:

C. 50

Step-by-step explanation:

I would say it looks more like 60 and 50 is the closest

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What is the discriminant of the quadratic equation 0 = _x2 + 4x – 2?

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The discriminant is 24

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Susan went to the store and found a shirt that was $36 dollars. When

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$42.35. 36/.85= 42.3529412

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3 years ago

Determine the equation of the line that passes through the points of intersection of the graphs of the quadratic functions f(x)

timofeeve [1]

Answer: $x-2y-2=0$

Step-by-step explanation:

Given :

$f(x) = x^2 - 4 \\ g(x) = - 3x^2 + 2x + 8$

Point of intersection :

$f(x)=g(x)\\x^2-4=-3x^2+2x+8\\4x^2-2x-12=0\\2x^2-x-6=0\\2x^2-4x+3x-6=0\\2x(x-2)+3(x-2)=0\\(x-2)(2x+3)=0\\x=2\,,\,\frac{-3}{2}$

$x=2\,;f(2)=2^2-4=0\\x=\frac{-3}{2}\,; f\left ( \frac{3}{2} \right )=\left ( \frac{3}{2} \right )^2-4=\frac{-7}{4}=-1.75$

So, we have points $\left ( 2,0 \right )\,,\,\left ( -1.5,-1.75\ \right )$

Equation of line passing through two points $\left ( x_1,y_1 \right )\,,\,\left ( x_2,y_2 \right )$ is given by $y-y_1=\frac{y_2-y_1}{x_2-x_1}\left ( x-x_1 \right )$

Let $\left ( x_1,y_1 \right )=\left ( 2,0 \right )\,,\,\left ( x_2,y_2 \right )=\left ( -1.5,-1.75\ \right )$

So, equation is as follows :

$y-0=\frac{-1.75-0}{-1.5-2}\left ( x-2 \right )\\y=\frac{-1.75}{-3.5}\left ( x-2 \right )\\y=\frac{1}{2}(x-2)\\2y=x-2\\x-2y-2=0$

4 0

4 years ago

Solve the inequality and enter your solution as an inequality comparing the variable to the solution.

pickupchik [31]

Hi Brainiac

-8+x<18

Simplify

x-8<18

Add 18 to both sides

x-8+8<18+8

x<26

I hope that's help:0

Please rate my answer,thanks:)

6 0

3 years ago