1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kirill115 [55]
1 year ago
15

Original Equation:8 - 7x^2 + 3 = 4x^2 - 1Frist step:11 - 7x^2 = -4x^2 - 1Which property justifies the first step?A. Division pro

perty of equalityB. Commutative property of addition C. Addition of equality D. Multiplication property of equality
Mathematics
1 answer:
Tpy6a [65]1 year ago
7 0

8 - 7x^2 + 3 = 4x^2 - 1

8+3-7x^2 = 4x^2-1

11-7x^2 = 4x^2-1

B. Commutative property of addition

We can swap numbers and obtain the same results.

In this case, we swapped 8+3 and added them.

You might be interested in
A curve in polar coordinates is given by: r=9+3cosθ. Point P is at θ=21π/18 .?
ikadub [295]

Answer:

Step-by-step explanation:

Given that a curve in polar coordinates is given by:

r=9+3cosθ

a) At point P, we have

θ=\frac{21\pi}{18}

Substitute to get

r=9+cos \frac{21\pi}{18}\\=9.3932

b) Cartesian coordinate is

x= rcos \theta=3.6934\\y =r sin \tjeta =8.6365

c) At the origin r =0

when r =0

we have

9+3cos\theta=0\\cos\theta =-3

Since cos cannot take values as -3 it doe snot pass through origin.

6 0
3 years ago
Which of the following expressions is equivalent to the expression 36 + 42?
olga2289 [7]
The answer is 6(6 + 7)
7 0
3 years ago
Read 2 more answers
The value of the solid's surface area is equal to the value of the solid's volume. find the value of x. 5*6*x
velikii [3]
<h3>Given</h3>

a cuboid with length, width, height dimensions 5, 6, x

<h3>Find</h3>

the value of x that makes the numerical value of the total surface area equal to the numerical value of the volume

<h3>Solution</h3>

The volume is given by

... V = L·W·H = 5·6·x = 30x

The area is given by

... A = 2(L·W + H(L+W)) = 2(5·6 +x(5+6)) = 2(30 +11x) = 60 +22x

When these are equal, we have

... 30x = 60 +22x

... 8x = 60

... x = 7.5

The desired value of x is 7.5.

7 0
3 years ago
A rectangular field has the area equal to that of a square field of side 60m.if the breadth of the rectangular field is 32m, fin
V125BC [204]

<u>Given</u> -

  • Area of rectangular field = Area of square field
  • side of square = 60m
  • breadth of the rectangular field = 32m

<u>To find</u> -

  • length of the rectangular field

<u>Solution</u> -

Area of square = side × side = (60 × 60)m² =

Area of square =3600m²

Hence,

Area of rectangular field = Area of square field = 3600m²

Area of rectangular field = l × b = 3600m²

=> l × 32m = 3600m²

=> l = \sf{\frac{3600}{32}\:m}

=> l = 112.5m

so, the length = 112.5m

5 0
3 years ago
Simplify 15x + 2y + 7x + 8y
omeli [17]

Answer:

22x+10y

Step-by-step explanation:

15x + 2y + 7x + 8y ----> 22x+10y

6 0
3 years ago
Other questions:
  • In a certain room, there are 28 women and 21 men. What is the ratio of
    8·1 answer
  • HELP QUICKLY PLEASE...
    12·1 answer
  • Two Friends share 3 Fruit bars equally. How much does each friend get?
    8·1 answer
  • The table shows ordered pairs of the function y = 8 - 2x.
    8·1 answer
  • Helpppp plzzzzzzzzzzzzzzz
    5·1 answer
  • Jaylen and six of her younger siblings have ages that are consecutive. When they moved from San Francisco to Chicago, their ages
    8·1 answer
  • Who can help me with this??? it's for a grade
    8·2 answers
  • I need help i don’t get this
    10·1 answer
  • please help &lt;3 answer anytime i got all the time really! no links or files! If your right BRAINIEST!!!
    9·1 answer
  • Explain how to calculate and find 32% percent of 150. <br> Correct answer gets brainiest
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!