Mathematics High School

which property of equality should you use to solve the equation for x? -3x = 21
A. The division property of equality
B. The subtraction property of equality
C. The addition property of equality
D. The multiplication property of equality

Answers

Answer 1

Answer:

A. The division property of equality

Step-by-step explanation:

To get x you need to find a way to get it by itself, which can be done by dividing -3 from both sides of the equation (which is the division property of equality).

For example,

-3x=21

/-3  /-3

x=21/-3

x=-7

Related Questions

decrease £85 by 20%
help plssss

Answers

Answer:

68

Step-by-step explanation:

it would be 68, as you would take away 17 from the original value

Jim wants to buy a new tablet for his homework. His budget is $350. If the tablet costs $330 plus 4.5% sales tax, can he buy it for $350 or less?​

Answers

Answer:

Yes, he can buy it for $350 or less

Step-by-step explanation:

330.00 x 4.5%

330.00 x 0.045 = 14.85

330.00 + 14.85 = 344.85

or

330.00 x 1.045  = 344.85

please help me!! 8th grade math, Pythagorean Theorem

Answers

Answer:

Step-by-step explanation:

-To find the incline do:6^2+14^2=x^2

Than whatever your 6 and 14 equal, find the square root of it


Find the volume of the prism?*

Answers

Answer:

The volume is 210 cm³

Step-by-step explanation:

The way to solve volume is LxWxH, so you would do 6x5x7 and you get 210.

If the exterior angles measurements of a hexagon are: 28°, 45°, 63°, 57º and 81°, find
the measure of the sixth exterior angle.

Answers

97 I am sure that is what it is

8(a+5)=8•a+8•5
___. ___
= |_?_|a + |_?_|

Answers

Answer:

|8|a + |35|     or      = |-8|a+|-35_|

Step-by-step explanation:

8(a+5)=8•a+8•5

         =8a+35

         = |8|a + |35|     or      = |-8|a+|-35_|

Seth bought glow-in-the-dark stars to
put on his ceiling. There are 5 big stars
and 25 little stars. He wants to make
constellations that each have 1 big
star. If he uses the same amount of
stars for each constellation, how many
little stars will each have?

Answers

Answer:

Each constellation will have 5 little stars.

Step-by-step explanation:

First, let's organize the information we have:

5 big stars25 little starsEach constellation should have 1 big starEach constellation should have the same amount of stars

Now, let's solve the problem:

Each constellation should have 1 big star, and Seth has 5 big stars, so we can infer that there would be 5 constellations.Since each constellation have 1 big star, and the amount of stars in each constellation is the same, the amount of little stars in each constellation are the same.We have 25 little stars, and there are 5 constellations; 25 ÷ 5 = 5, so each constellation have 5 little stars.

At Sunrise Donuts you can buy 6 donuts and 2 kolaches for $8.84. One kolache and 4 donuts would cost $5.36. What is the price for one donut at Sunrise Donuts?​

Answers

Answer:

1.34

Step-by-step explanation:

there are 9 rows of tomato plants with 205 plants in each row. How many tomato plants are there in all?

Answers

If there are 205 in each row
Then 9*205 would be the answer
Because 205 tomatoes are repeated or present 9 times
Hence the total tomato plants are: 1845

Answer:

1 row = 205plants

9*205=1845plants

Therfore 1845 plants are there in 9 rows of tomato.

Step-by-step explanation:

Please mark as brainliest.

Find the volume of the cube in inches 3^ below. Then select the correct units
when entering your answer.

4 in.
4 in.
4 in.

Answers

The answer should be 64 in^3

hope this helps!

821 X ______ = 8,210

Answers

the answer to this is 10, have a great day :)

The price of a video game system dropped by 18%. What is the current price if it used to be $140?

Answers

Answer:

$114.80

Step-by-step explanation:

Multiply 18% and 140 to find the drop price.

.18 x 140= $25.20  now subtr. this from the original price

$140.00-$25.20=$114.80 is the sale price

Find the value of angle A and angle B
Pls help me with those questions ):

Answers

Answer:

5)  A= 153

    B= 27

6)  A= 80

    B= 100

7)  A=88

   B=92

8) A= 30

   B= 150

Step-by-step explanation:

if you look closely all the values are equal to those opposite of them

sorry if its wrong

please help me and the answer is not the first one

Answers

i think it’s the second one!!!

Find the distance between (-5,3) and (4,-5). Round your answer to the nearest hundredth.

Answers

Answer:

12.04

Step-by-step explanation:

square root 2(9x9 + 6x6) = 12.04

Find the indicated side of the
triangle.
a
7.
30°
D
b = [ ? IV

Answers

I think it’s 7 and 3 for the second number

PLEASE HELP ILL GIVE BRAIBLIEST

Answers

Answer:

The same amount

Step-by-step explanation:

Because its Borrowed money you cant just go around spending unlimited money with out paying the bank back it would not be fair.

Help me please aahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh

Answers

Your picture is not loading or is blank please ask another question.

Ed solved a puzzle 3/4 faster than Brett. Brett solved the puzzle in 135 seconds. How long did it take Ed to solve the puzzle.

Answers

Answer:

101.25 seconds.

Step-by-step explanation:

We know that Ed solved the puzzle 3/4 faster than Brett.

Then if Brett solved the puzzle in a time T, Ed solved the puzzle in a time (3/4)*T.

We know that Brett solved the puzzle in 135 seconds, then:

T = 135s

This means that Ed solved the puzzle in:

time = (3/4)*T = (3/4)*135s = 101.25 seconds.

Paul has 30 postcards. He has
4 times as many large postcards
as small postcards. How many
small postcards does he have?
How many large postcards?

Answers

Answer:

120

Step-by-step explanation:

is the right answer I think.

Answer:

Paul has 6 small post cards and 14 big postcards

Which multiplication problem is equivalent to 2 3/4÷3 1/3?
A. 11/4 ⋅ 10/3
B. 4/11 ⋅ 10/3
C. 11/4 ⋅ 3/10
D. 4/11 ⋅ 3/10

Answers

the first one my dude (A)
hope this helps

Equation C: y = 6x + 9 Equation D: y = 6x + 2 How many solutions are there to the given set of equations?

Answers

Answer:

No solution

Step-by-step explanation:

Equation C :

y = 6x + 9

Equation D :

y = 6x + 2

By comparing both the equations with slope-intercept form of the equation,

y = mx + b

Where, m = Slope of the line

And b = y-intercept

Slopes of both the lines C and D are common as 6,

Therefore, both the lines will be parallel.

And the set of parallel lines has no solution.

Therefore, given set of equations have no solution.

sunglasses cost 70 euros. the exchange rate is 1 euro = 0.859

Answers

Answer: 60.13 USD

Step-by-step explanation: 0.859 x 70 = 60.13

Will mark brainliest

Answers

Answer: Volume of prism is LxWxH which is 360

Step-by-step explanation:

A) are un număr de 6 vârfuri, 9 muchii, 5 feţe. b) bazele prismei sunt ......................................................................... c) muchiile laterale sunt .......................................... Pe planele bazelor. 2) Pentru o prismă triunghiulară regulată cu latura bazei de 6 cm şi înălţimea de 43cm: a) suma lungimilor tuturor muchiilor este de .................. Cm; b) aria bazei este de ......... Cm2; c) aria laterală este de ......... Cm2; d) aria totală este de ......... Cm2; e) volumul este de ......... Cm3.

Answers

Answer:

A

Step-by-step explanation:

Help plz i will give brainliest!!

Answers

Precipitation is when liquid falls from the atmosphere and reach the surface of the Earth. Condensation is when water vapor changes back into water (in liquid form).

explain why we need to always balance algebraic equations.

Answers

What you do to one side of an equation you must do to the other in order for it to remain balanced. It’s important to remember that equations have an equal sign and expressions do not. We balance or solve equations, but simplify or evaluate expressions.

Q 18: Melissa uses 150 g of sugar for every 6 eggs. How many eggs should she use with 350 g of
sugar?

Answers

Answer:

14 eggs

Step-by-step explanation:

150 grams need 6 eggs

1 gram need 6 ÷ 150 eggs

350 grams need 350×6÷ 150 =  14 eggs

Need help real quick lol pls

Answers

Answer:

A

Step-by-step explanation:

let me know if this was right or wrong

2. Let u = <4, 8>, v = <-2, 6>. Find u + v. (1 point)

Answers

Answer:

u+v = (4,8)+(-2,6)

=(4-2, 8+6)

=(2, 14)...This is the required answer.

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