3x = 21 What is the value of x?

Answers

Answer 1
3x = 21
devide each side by 3

3x = 21
----- ----
3. َ ّ ُّ. 3


x = 7

Related Questions

simplify the following expression=(4ad)-1/13b x 16a/(13abc)-1

Answers

Answer:

(4ad) - 16/169c -1.

Step-by-step explanation:

Alright. Let's start.

(4ad) - [tex]\frac{1}{13}[/tex]b * [tex]\frac{16a}{13abc}[/tex] -1 is the expression.

So, by PEMDAS, we need to do the multiplication first. We can also say that 1/13b is the same as b/13.

(4ad) - 16ab/169abc -1     Now let's cancel out the b and a on numerator and denominator.

(4ad) - 16/169c -1.

Hope this helps!

Pls help as quick as possible 8th grade math!!!!!

Answers

Answer:

1) y= 3x + 7

2) y= 3/4x + 10

3) y= -5x - 2

4) y= 12x - 6

5) y= 1/2 + 9

Step-by-step explanation:

PLEASE HELP
The graph of y = 2x2 + x is shown
on the grid.
By drawing the line y = 2x + 3,
solve the equations y = 2x2 + x
y = 2x + 3
x = -1
y =

Answers

Answer:

12 +43 equal 17 pls i hope it help you

Step-by-step explanati

slove the equation below for y :

6x-4y=12

Answers

Answer:

[tex]y=-\frac{3(x +2)}{2}[/tex]

Step-by-step explanation:

We have an equation, and the question is asking for us to solve y. So to solve, we have to isolate y.

6x - 4y = 12

Subtract 6x from both sides :

-4y = 12 - 6x

Divide both sides by -4 :

[tex]y=-\frac{3(x+2)}{2}[/tex]

THIS IS CONFUSINGG HELP

Answers

Answer: B hope that helps

Use the table to find the ratio. Enter the ratio as a fraction in simplest form.
Color of socks
Number of socks
white
3
black
8
blue
5
brown
7
The ratio of black socks to all of the socks is

Answers

8:23 is the ratio :)

Cuál es el 45% de 4800

Answers

Answer:

2160

Step-by-step explanation:

45x4800

divide that by 100!

HELP PLEASE!!! Find the number(s) with the following property: two times the sum of 18 and a number is 8 greater than nine times the same number.

Answers

Answer:

number is 4

Step-by-step explanation:

let 'n' = the number

2(n + 18) = 9n + 8

2n + 36 = 9n + 8

36 = 7n + 8

28 = 7n

n = 4

13. f(x) = 3x - 6
How do we find the domain of f^-1 including any restrictions inherited from f?

Answers

Answer:

whatever you get for that

Step-by-step explanation:

you plug in -1 for x

5 ft
4 ft
3ft.
Find the volume

Answers

Answer:

60 feet. :)

Step-by-step explanation:

This is the formula you want to use:

[tex]l*w*h=V[/tex]

It means that length·width·height = Volume. So, 5 · 4 · 3 = 60 ft.

Don Miguel vende vacas en $7000. Vendió 26 vacas y obtuvo una ganancia de $182,000. ¿Cuál ecuación corresponde a esta situación?​

Answers

26 x $7000 = $182,000
Espero Haber Ayudado

give an explaination of what Ordering decimals is

Answers

When ordering decimals, first write one decimal beneath the other in their original order. Then compare them two at a time. When ordering four or more decimals, it is helpful to write a number in a circle next to each to order them.

Write the equation of the line passing through the given points (-4,2) (-4,7)

Answers

Answer:

Step-by-step explanation:

The x value is always going to be - 4. The y value will vary quite a bit.

x + 4 = 0 is the equation of the line. The slope is undefined. There is no y intercept. There is an x intercept; it is minus 4.

There are 12 marbles in a bag. There are 4 blue, 5 red, 1 green, and 2 black.
12 Marbles totall
What is the probability of a red or a green from the bag?

5
12
12

Answers

Answer:

1/2

Step-by-step explanation:

There are 6 marbles that are either red or green out of 12 total marbles, so you have:

6/12 = 1/2

Answer:

1/2

Step-by-step explanation:

To find the probability, you need to put the number of what you want to know the probability of over the total. In this case, we want to know what the probability of red and green over the total is. So, hence the equation:

[tex]\frac{5+1}{12}[/tex] or [tex]\frac{6}{12}[/tex] which can be simplified to [tex]\frac{1}{2}[/tex].

1) A puppy eats a sausage 5 seconds faster than a kitten eats an identical sausage. If they share one sausage, they can eat it in 6 seconds. How long does it take each animal to eat a sausage alone?

2) A tourist ignores the warning signs and leaves food in his car while he goes for a hike. A mama bear and her cub open the car door in 6 seconds. How long would it take each bear to open the car door alone if the cub needs 9 more seconds than the mama bear?

3) A superhero and his sidekick simultaneously leave the city and fly toward a secret hideout that is 1800 km away. The superhero's speed is 100 km/h slower than the sidekick's speed, and so he arrives at the hideout 36 minutes after his sidekick. Find the speed of each.

4) A bear loves visiting his friend, the piglet. The distance between their houses is 300m, and the bear always walks from his house to the piglet's house in exactly the same amount of time. But today, the bear stops at a beehive after walking 1/4 of the distance. He eats honey for 2.5 minutes and then continues to the piglet's house at a speed 15 m/min faster than usual. The total journey to the piglet's house takes the exact same amount of time as it usually does, when the bear does not stop for honey. How long does the journey take?

Answers

Answer:

1) The puppy takes 10 minutes, the kitty takes 15 minutes.

2) The mama bear takes 9 minutes, the cub takes 18 minutes

3) The sidekick goes at 600 mph, the hero goes at 500 mph.

4) 10 Minutes

5) RSM is so hard, amiright?

Step-by-step explanation:

1) You can simplify the word problem into the equation 1/x + 1/x+5 = 1/6.    For problems like these, you have to simplify the last part to a fraction, not a whole number.   Then you just solve.

2) Same thing.  1/x + 1/x+9 = 1/6.   Solve.  Boom.  Done.

3) A bit different, but it simplifies to 1800/x-100 - 1800/x = .6.   Solve.   C'mon, you should've been able to do this one.

4) Harder, simplifies to 75/x+225/x+15+2.5 = 300/x.   You get the last part because the time the bear took is equal to the time it would normally take, which is the entire distance over the normal pace.   Then you solve and there we go, most of your RSM homework is done.  

Answer:

Puppy takes 10 sec.

Kitty takes 15 sec.

The mama bear can do it in 9 seconds

The cub can do it in 18 seconds

Superhero: 500 km/h

Sidekick: 600 km/h

Karla needs to convert 16 oz to cups. She knows that 8 liquid oz 5 1 c. Her work is shown. The rate is 8 oz per cup.Because 16 3 8 5 128, the number of cups is 128. Is Karla correct? Explain your answer.

Answers

Answer:

16 fluid ounces = 2 cups

Step-by-step explanation:

1 cup = 8 fluid ounces

Is this statement always true?A cross section parallel to the base of a right rectangular prism is a square

Answers

Answer:

Step-by-step explanation:

No, it's not always true

Help?!? I know that we need to use the Triangle Angle Sum Theorem, but... I'm completely blank.

Answers

Answer:you should add the sides

Step-by-step explanation:

Solve for t:
3t + 5t - 5 = 11

Answers

Answer:

t=2 is the answer to the problem

Step-by-step explanation:

8t-5=11

8t=16

t=2

Answer:

t=2

plz mark as brainliest

Step-by-step explanation:

slope of -1 and it passes through the origin

Answers

Answer:

Step-by-step explanation:

The slope of negative one means it is the opposite of a positive graph and the overall value is decreasing. The origin is (0,0)

can u help me graph the line y=7

Answers

Answer:

Put a dot on 7 on the y axis then draw a horizontal line through y=7

Step-by-step explanation:

7 on y the axis on the vertical line

3. A scientist recorded the movement of a pendulum for 10 s. The scientist began recording when the pendulum was at its resting position. The pendulum then moved right (positive displacement) and left (negative displacement) several times. The pendulum took 4 s to swing to the right and the left and then return to its resting position. The pendulum’s furthest distance to either side was 6 in. Graph the function that represents the pendulum’s displacement as a function of time.
(a) Write an equation to represent the displacement of the pendulum as a function of time.
(b) Graph the function.

Answers

Answer: Hi I just finnish this assignment yesterdaylol

im still doing revisons on my "works shown" but heres a screenshot of my work (DO NOT JUST COPY N PASTE MY WORK, THE TEACHERS WILL KNOW )(U HAVE TO WRITE IT ON A PICE OF PAPER BY UR SELF)

Step-by-step explanation: do u go to cava (10th grade?)

im wondering because i need help on an assignment lol.

also, here is the feed back i resived  from my teacher.

"#3 The graph needs to be more accurate such as same distance, symmetric, and height.  Missing steps to finding b.  Use the formula for finding the period, but instead solve for b.  (-5)

Show how the period is found.  Include a table showing substitution for the five points.  attend office hours at 8:30am if you need help with this."

when you finish the revisions can you please show me it too. PLZ MARK BRAINLIEST

Thank you.

and ur welcome lol

Work out the size of angle x.
Х
43°
90

Answers

Answer:

It's 47

Step-by-step explanation:

I hope this helps you

Write an equation of the line that passes through the given points.

(2, 7), (0, −5)

Answers

Answer:

y=6x-5

Step-by-step explanation:

After swimming 60 feet below the surface of water, a whale swims up 30 feet. Use a number line to help you create an equation that shows the new location of the whale in relation to the water service.

A. The equation is -60 + (-30) = -90. The whale is 90 feet below the waters surface.
B. The equation is -60 + (-30) = -30. The whale is 30 feet below the water surface.
C. The equation is -60 + 30 = -30. The whale is 30 feet below the water surface.
D. The equation is -60 + 30 = -90. The whale is 90 feet below the water surface.​

Answers

Answer:

C. The equation is -60 + 30 = -30. The whale is 30 feet below the water surface

Step-by-step explanation:

At the surface of the water in the swimming pool, the height of elevation is 0.

Thus, if you swim 60 ft below the surface, it means you are going in the negative direction when we consider a number line. Thus, distance = -60 ft

Now, when you swim back up by 30 ft, it is in the positive direction. Thus, total distance is now; -60 + 30 = -30 ft

Thus value denotes a negative direction and it means you are 30 ft below the surface of the water.

A line has a slope of .25 and a y-intercept of − 3 . What is the equation of the line in standard form?

Answers

Answer:

y = 1/4x - 3

Step-by-step explanation:

change slope from decimal to fraction form

can you help me graph the line?

Answers

Answer:

Step-by-step explanation:

1 4/5 = 2/5 + r HELPPPPPPPPPPPPPPPPPPPPP

































Answers

Answer:

r=7/5

Step-by-step explanation:

If k is the midpoint of, jk=11x-7 and kl=6x+2, find jl

Answers

Answer:

JL = 118/5

Step-by-step explanation:

Because K is the midpoint, we know that JK and KL are going to equal each other because of the Segment Addition Postulate.

JK + KL = JL

So we know that JK = 11x-7 and KL = 6x+2

Now, we solve for X.

11x-7 = 6x+2

In order to get X alone, we must get the X's all to one side and the numbers to one side.

11x-7 = 6x+2

   +7        +7

11x = 6x + 9

-6x   -6x

5x = 9

x = 9/5

Now, we plug X into the equations.

JK = 11x - 7

JK = 11(9/5) - 7

JK = 99/5 - 7

JK = 64/5

KL = 6x + 2

KL = 6(9/5) + 2

KL = 54/5

Now, we add the numbers (fractions, really) together so that we can get the whole value of the line.

64/5 + 54/5 = 118/5

Select all expressions that show "X" increased by 35%.

a
1.35X
b
(35/100)X
c
x + (35/100)
d
( 1+0.35)x
e
(100+35) + x
f
(100 + 35)x

Answers

All the equivalent expressions are,

1.35X and (1+0.35)x.

The correct options are a and d.

What is a percentage?

A ratio or value that may be stated as a fraction of 100 is called a percentage. And it is represented by the symbol '%'.

Given:

The value of X increased by 35%.

Here, we will use the percentage formula.

The value is increased by 35%.

That means,

100 + 35 = 135%

135% in decimal form is 1.35.

In expression form as subject to X,

X(1.35)

In expressed form,

= X + 0.35X

= 1.35X

Therefore, equivalent expressions are 1.35X and (1+0.35)x.

To learn more about the percentage;

https://brainly.com/question/24159063

#SPJ2

Other Questions
How old was Shakespeare when he married? The name of his wife--and what CONDITION WAS she in? Who does the first to go on trial blame? A Abigail Williams b Thomas Putman c Tituba d Betty Parr Use the information given in the figure to find the length RT.If applicable, round your answer to the nearest whole number.The lengths on the figure are not drawn accurately.R1175328THELP LOLL I need help this due today Oddly shaped bones like your vertebrae and pelvis? a.irregular bones c. short bones b. flat bones d. long bones The tobacco price support system had several effects. First, it allowed thousands of farm families to stay on the land and not move to the towns where jobs were scarce. Since price supports lasted for years, these families could better their lot and still live like their ancestors had. Second, it meant that voters in the east continued to be closely tied to the Democratic Party, which devised the plan. Third, it provided merchants, bankers, and warehousemen in the towns on Tobacco Road with guaranteed business. Towns like Greenville and Kinston continued to set their school terms and schedule their store sales by the phase of the tobacco season. Tobacco Road had been a dirt path for many, but the New Deal turned it into a paved highway. What were the effects of the tobacco price support system? Check all that apply.a. Many farmers were able to hold on to their land.b. Tobacco farmers no longer had to follow set prices.c. The Democratic Party was promoted across the state.d. Farmers were guaranteed an income for several years.e. Business declined in towns that were part of the tobacco industry. The sum of the ages of a boy and his mother is 48. If the mother is three more than twice the boys age, find the difference in the ages of the boy and his mother. help please i gave 55 points Solve the proportion. 2b-1/3 = b-1/6 Help me with these questions please Answer number 20 plz (geometry) look at the picture I attached find value of x below. Can someone please help me outt How to say the following dates in Spanish?10th Aug31st October21st December14th February find the measures of the numbered angles in rhombus defg. Anyone, please help I'm stuck!! $125 headphones, 20% discount How did the rise of the trans Saharan effect there environment Define area. Give an example of how it is used in the real world. What label (units, units 2 , or units 3 ) is used for it? btw i'm not in college im in middle school In a proportional relationship, y=2 when x=8. Which of the following equations woulddescribe this relationship?