MATHEMATICS MIDDLE SCHOOL

X^2 -3x+2 factor out completely

Answers

Answer 1
Answer:

Answer:

(x-2) (x-1)

Step-by-step explanation:

x^2 -3x+2

What numbers multiply to 2 and add to -3

-2*-1 = 2

-2+-1 = -3

(x-2) (x-1)

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What is the approximate area of the shaded region?

Answers

That 10 is the diameter of the circle.

First let's find the area of the square.

A = s^2

Where 's' is the side.

A = 10^2

A = 100

Now let's find the area of the circle.

The '10' is also the diameter of the circle.

A = pi * r^2

A = 3.14 * 5^2

A = 3.14 * 25

A = 78.5

Now subtract this from the area of the square.

100 - 78.5 = 21.5

So the approximate area of the shaded region is 21.5cm^2

Answer:

21.5^2

Step-by-step explanation:

In scienceclass the teacher measured 800 milligramns of an chemical.How manyn grams is it.

Answers

.8 grams
1000 mg = 1 g
That's why you do 800/1000 or 8/10

The height of a tree, y, is related to the length of its shadow, x, by the equation y = kx. If a tree's height is 24 feet and its shadow is 9 feet long, then k =

Answers

What you do is divide x to the other side, 24/9 = k. Then you solve. K = 2.6 repeating, or 8/3.

Answer:

(8)/(3)

Step-by-step explanation:

plug in 24 for y and 9 for x, to get 24 = 9k, so k = 24/9=8/3

hope this helped:)

Amita decides that she wants them all to have a square base how many other possible molds can she use?

Answers

She could use a pyramid mold or a cube mold. This is because the bases of those shapes are squares, even thought the actual figure is not. Think of the pyramids in Egypt, they look triangular, but the base is square. I'm sure there are more possible molds that you could use, but those are just a few of the simple ones. I hope this helps! :)

How do I solve
2(6x-1)+2(2x+5)=120

Answers

2(6x-1)+2(2x+5)=120

12x-2+4x+10=120

16x+8=120 |-8

16x=112 |/16

x=112/16

x=7

Carla made a scale drawing of a classroom. The length of the classroom in the drawing is 5in. The actual length is 40ft. What scale did Carla use for her drawing?

Answers

Answer:

1/96

Step-by-step explanation:

scale is

a model cannot be as same size as that of actual object ,

hence objects are scales down to some value so that its model can be comfortably made.

scale is generally ratio of length  of drawing and actual length of object

scale = length  of drawing / actual length of object.

Given

length of classroom drawing = 5in

actual length of classroom = 40 ft

as unit of drawing and actual classroom is different lets make unit of class smilar to that of drawing that is in inches

we know

1 feet = 12 inches

thus 40 feet = 12*40 inches = 480 inches

thus,

actual length of classroom in inches = 480 inches

scale used by Carla = length  of drawing / actual length of classroom

                                = 5 inches/480 inches = 1/96 (answer)
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