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ki77a [65]
3 years ago
10

(–2) + 6 + 1 = 1 + 6 + (–2) what property is this

Mathematics
2 answers:
jeka943 years ago
8 0
(–2) + 6 + 1 = 1 + 6 + (–2) is B.Commutative Property
mariarad [96]3 years ago
8 0
B.Commutative property
You might be interested in
1
amm1812

Answer:

30m squared carpet is needed to cover the hallway and the living room.

Step-by-step explanation:

Living room area

6 × 4.2 = 25.2

Hallway area

3.2 × 1.5 = 4.8

Total area

25.2 + 4.8 = 30m squared

5 0
3 years ago
The flagpole in Terry's schoolyard is 42 ft tall. On a sunny day, the flagpole casts a shadow 20 ft long. What is the angle of e
kirill [66]

Answer:

64.5°

Step-by-step explanation:

angle of elevation is the angle from the point where the shadow ends. this create a right angle triangle. using tan, you can find the angle.

tan theta = opposite/adjacent

angle = tan^-1(42/20)

angle = 64.5°

4 0
3 years ago
(a) Find parametric equations for the line through (1, 4, 4) that is perpendicular to the plane x − y + 2z = 7. (Use the paramet
Alex777 [14]

Answer:

x=1+t\\y=4-t\\z=4+2t

Step-by-step explanation:

A vector perpendicular to the plane ax+by+cz+d=0 is of the form (a,b,c).

So, a vector perpendicular to the plane x − y + 2z = 7 is (1,-1,2).

The parametric equations of a line through the point (x_0,y_0,z_0) and parallel to the vector (a,b,c) are as follows:

x=x_0+at\\y=y_0+bt\\z=z_0+ct

Put (x_0,y_0,z_0)=(1,4,4) and (a,b,c)=(1,-1,2)

Therefore,

x=1+t\\y=4-t\\z=4+2t

xy-plane:

Put z = 0 ⇒ t = -2 ⇒x = - 1 , y = 6

So, at point (-1,6,0)

yz-plane:

Put x = 0 ⇒ t = -1 ⇒ y = 5, z =2

So, at point (0,5,2)

xz-plane:

Put y = 0 ⇒ t = 4 ⇒ x = 5, z = 12

So, at point (5,0,12)

5 0
3 years ago
How many solutions can be found for the equation 5x + 3(x − 1) = 10x − x − 5? (4 points)
Svet_ta [14]

Answer:

The correct option is b.

Step-by-step explanation:

To find the number of solutions, we need to solve the equation:

5x + 3(x - 1) = 10x - x - 5

Let's group all the "x" on the equation.  

5x + 3x - 10x + x = 3 - 5              

Now, let's solve for "x".

-x = -2                

x = 2    

Therefore, the equation has one solution. The correct option is b.

I hope it helps you!            

8 0
2 years ago
I will give Brainliest :)
lawyer [7]
1. k+5=11
2. 7n=42
3. l+13=17
4. 10- p²=9
5. x²+y²=4
6 0
3 years ago
Read 2 more answers
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