MATHEMATICS HIGH SCHOOL

16. Expand (2x - 1)(x - 3).
A. 2x2 - 7X+3 B. 2x2 +7x+3
C. 2x2-7X-3 D. 2x2+7X-3 E. x2+7X-3

Answers

Answer 1

Answer:

Answer:

Hey there!

$(2x-1)(x-3)$

$2x^2-1x-6x+3$

$2x^2-7x+3$

Hope this helps :)

Answer 2

Answer:

Answer:

see below

Step-by-step explanation:

the simple answer is a if you need an explanation just comment

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Solve the equation: 9x − 2 = 4(x + 3)14 13 14 9 10 5 14 5

Liana started to evaluate the function f(x) = 2x2 – 3x + 7 for the input value 2.f(x) = 2(2)2 – 3(2) + 7

= 2(4) – 3(2) + 7

What is the value of the function when x = 2?

Answers

f(x) = 2x² - 3x + 7

x = 2

f(2) = 2(2²) - 3(2) + 7
f(2) = 2(4) - 6 + 7
f(2) = 8 - 6 + 7
f(2) = 15 - 6
f(2) = 9

The value of the function when x = 2 is 9.

If you would like to know the value of the function when x = 2, you can calculate this using the following steps:

f(x) = 2 * x^2 - 3 * x + 7
x = 2
f(2) = 2 * 2^2 - 3 * 2 + 7 = 2 * 4 - 6 +7 = 8 - 6 + 7 = 9

The correct result would be 9.

Explain how to use a coordinate plane to find the area of a rectangle with vertices (–4, 9), (–4, –3), (–1, –3), and (–1, 9). what is the area?

Answers

We want to use a coordinate plane to find the area of the given rectangle.

We will see that the area is 36 units squared.

So we only know the vertices of the rectangle, which are:

(-4, 9)
(-4, -3)
(-1, -3)
(-1, 9).

The first thing we can do, is graph these in a coordinate axis so we can see our rectangle.

Below you can see the graph of the rectangle where the four vertices are graphed and I drew the sides of the rectangle.

Now that it is graphed is easy to see the measures of each side, one side measures 3 units (from -1 to -4 on the x-value) and the other side measures 12 units (from -3 to 9 on the y-value)

Then the area of the rectangle is:

A = 3*12 = 36 square units.

If you want to learn more about rectangles and areas, you can read:

brainly.com/question/17297081

the formula for area of a rectangle is

Area = length x width

since both the length and the width of the rectangle lie on the same x and y axis, we can find the distance between the width and the distance between the length by subtracting

(-4,9) (-4,-3)

these points lie on the same x axis, so they create a vertical line

9-(-3) = 12

12 units is the distance between them

(-4,-3) (-1,-3)

these points lie on the same y axis, so they create a horizontal line

-1-(-4) = 3

3 units is the distance between them

now that we have the length and the width, we can find the area

A = 12 x 3

A = 36 units²

Justin is asked to solve the following system of linear equations using the elimination method.5x − 12y = 3
−20x + 14y = 13

Which of the coefficients should Justin try to change so that it cancels with another coefficient?

Answers

Answer:

B, 5

Step-by-step explanation:

Got it correct

The point 3,4 lies on the graph of f(x)= sqrt(2x+a). Which ordered pair below lies on the graph of g(x)=1/2sqrt(2x+a)?a)3/2,2
b)5/2,3/2
c)3,2
d)27,8

Answers

$(3;\ 4);\ f(x)=√(2x+a)\n\n√(2\cdot6+a)=4\n√(12+a)=4\ \ \ /^2\n12+a=16\na=16-12\na=4\n\nf(x)=√(2x+4)$

$g(x)=(1)/(2)√(2x+4)\n\na)\ \left((3)/(2);\ 2\right)\nR=(1)/(2)\sqrt{2\cdot(3)/(2)+4}=(1)/(2)√(3+4)=(1)/(2)\sqrt7;\ L=2;\ L\neq R\n\nb)\ \left((5)/(2);\ (3)/(2)\right)\nR=(1)/(2)\sqrt{2\cdot(5)/(2)+4}=(1)/(2)√(5+4)=(1)/(2)\sqrt9=(1)/(2)\cdot3=(3)/(2);\ L=(3)/(2);\ L=R$

$c)\ (3;\ 2)\nR=(1)/(2)√(2\cdot3+4)=(1)/(2)√(6+4)=(1)/(2)√(10);\ L=2;\ L\neq R\n\nd)\ (27;\ 8)\nR=(1)/(2)√(2\cdot27+4)=(1)/(2)√(54+4)=(1)/(2)√(58);\ L=8;\ L\neq R\n\nAnswer:B$

the population of a colony of cells is growing so that it will triple every hour. suppose the current population is 200 cells. how many hours ago was there only one cell?

Answers

I believe that the answer to the question provided above is that after 66.67 hours the population of the colony cell has reached to 200.
Hope my answer would be a great help for you. If you have more questions feel free to ask here at Brainly.

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