What is
7x - 4 = 21 ?

Answers

Answer 1

7x= 21+4
7x=25
X= 25/7
Answer 2

Answer: x=4.2

Step-by-step explanation:add 4 to both side .you have 7x=25.Now divide which gives u 4.2 .


Related Questions

Molly went shopping and her bank account got below $7.50.

x>7.50
x>=7.50
x<7.50
x<=7.50​

Answers

Answer:

x<7.50

Step-by-step explanation:

n < (less than) because she spent money so it decreases

X 7.50 is the answer

Suppose that the total annual consumption of salmon in a certain country is given by y = 5.59x + 837.5 and that the total annual consumption of tuna in this country is given by y = 1.49x + 878.5, where consumption is measured in millions of pounds and x is the number of years since 2010. When consumption of salmon reaches consumption of tuna, what is the annual consumption of salmon? 897.87 million pounds 890.42 million pounds 894.89 million pounds 893.4 million pounds

Answers

Answer:

893.4 million pounds

Step-by-step explanation:

Total annual consumption of salmon is given by [tex]y=5.59x+837.5[/tex]

Total annual consumption of tuna is given by [tex]y=1.49x+878.5[/tex]

As consumption of salmon is equal to the consumption of tuna,

[tex]5.59x+837.5=1.49x+878.5\\5.59x-1.49x=878.5-837.5\\4.1x=41\\x=\frac{41}{4.1}\\ x=10[/tex]

Put [tex]x=10[/tex] in [tex]y=5.59x+837.5[/tex] to find total annual consumption of salmon.

Therefore,

Total annual consumption of salmon = [tex]5.59(10)+837.5=893.4[/tex] million pounds

a number sentence is shown which number makes the number sentence true A)1/16
B)4
C)15/2
D)16
WILL GIVE BRAINLYEST​

Answers

Answer:

The answer is B cause if you take 8×1/2 you get 4

Answer:

B is correct!

Explanation:

If you divide 1/2 by 4 your answer is 8.

Hope it helps !!:)))

2x-8+3x-10=17 ayuden please ahorita

Answers

Answer:

x=7

Step-by-step explanation:

brainlist  por favor

Answer:

x= 7

Step-by-step explanation:

just use mathxway without the x, all you have to do is type in your question and it'll give you the answer

Which expression has the greatest values?
NEED HELP ASAP!
(look at picture)​

Answers

Answer:

3

Step-by-step explanation:

The wall is in the shape of a rectangle.
The wall is 3 m wide and 2.5 m high.
The tiles are rectangles 20 cm wide and 25 cm high.
The tiles are sold in boxes.
There are 20 tiles in each box.
Each box of tiles costs £8.50
Work out the total cost of the boxes of tiles Andy needs to buy.
You must show all your working.
(Hint: First find the area, then find the number of tiles needed

Answers

Step-by-step explanation:

Area of wall (including window ) 4.5×3=13.5m

2

Area of window is 80×50+

2

1

×80×20

4000cm

2

+800cm

2

=4800cm

2

=0.48m

2

Area needed to paint 13.5−0.48=13.02m

2

Cost of painting=13.02×158=2057.16

Please help. The picture is below

Answers

Answer:

yea you got it right its c

Step-by-step explanation:

1. A candy company used 18 pints of chocolate to make 3 boxes of candy. What is the rate of chocolate per box?
2. A bouquet had 6 flowers and sold for $30, which is a rate of $___ per flower.
3.A carpenter installed 60 sheets of drywall in 10 minutes. What is the rate per minute?
4.A fair owner made 8 dollars when a group of 2 people entered, which is a rate of ___ dollar per person.
5. An industrial machine is able to make 30 pens in 5 seconds. What is the rate made per second?
need answers today

Answers

Answer:1. 6 pints per box 2. $5 per flower 3. 6 sheets a minute 4. 4 dollars a person 5. 6 pens a second

Step-by-step explanation:

Please if correct give brainliest :)

Answer:

1) 6 pints of chocolate per box,2) $5 per flower,3)6 sheets of drywall in ten minutes,4) 4$ dollars per person,5) 6 six pens made in 6 seconds

Step-by-step explanation:

Can I please get help with the Answer

Answers

Answer:

56

Step-by-step explanation:

Answer:

B = 56

Step-by-step explanation:

A + B = 90 degrees

(6x - 8) + (5x + 21) = 90

6x - 8 + 5x + 21 = 90

(6x + 5x) + (-8 + 21) = 90

11x + 13 = 90

11x + 13 - 13 = 90 - 13

11x = 77

11x/11 = 77/11

x = 7

Plug into (5x + 21).

5(7) + 21 =

35 + 21 = 56

B = 56

Container A and container B have leaks. Container A has 600 ml of water, and is leaking 5 ml per minute. Container B has 750 ml, and is leaking 7 ml per minute. How many minutes, x, will it take for the two containers to have the same amount of water?

Answers

Answer:

si papi

Step-by-step explanation:

WILL DO A BRIANLY! The system inequalities is partially graphed. The only missing portion is the shading. Which area labeled in the diagram should be shaded to represent the solution?
A) A
B) B
C) C
D) D

Answers

Answer:

C

Step-by-step explanation:

The Diagonal line is y < = 2, and the horizontal line is y < = x. Since both signs are less than signs, you shade below each line, which would be area c.

For questions 18-20, if l \\ m, find the values of x and y

Answers

Answer:

Step-by-step explanation:

18). l║m and a transverse is intersecting these lines.

     (11y - 32)° = (6x + 7)° [Vertical angles]

     -6x + 11y = 39 -------(1)

      (3x - 16)° + (6x + 7)°= 180°  [Same side exterior angles]

      9x - 9 = 180

      9x = 189

      x = 21

      Now substitute the value of x in the equation (1)

      -6(21) + 11y = 39

      11y = 39 + 126

      y = 15

19). l║m and a transversal is intersecting these lines.

     (8x - 14)° + (5y + 16)° = 180° [Linear pair of angles]

      8x + 5y = 178 --------(1)

      (8x - 14)° = (5x + 34)° [Alternate exterior angles]

      8x - 5x = 48

      3x = 48

      x = 16

      From equation (1)  

      8(16) + 5y = 178

      128 + 5y = 178

      5y = 178 - 128

      y = 10

20). From the figure attached,

      m∠CAB = (5y - 23)°

      Since sum of interior angles of a triangle is 180°

     m∠CAB + m∠ACB + m∠ABC = 180°

      (5y - 23)° + (2x + 13)° + (47)° = 180°

      2x + 5y = 143 ------(1)

      (5y - 23)° = 3x°

      3x - 5y = -23 -----(2)

      Equation (1) + Equation (2)

      (2x + 5y) + (3x - 5y) = 143 - 23

      5x = 120

      x = 24

      From equation (1)

      2(24) + 5y = 143    

      48 + 5y = 143

      5y = 95

      y = 19          

Which of the following is a rational number? (5 points)

square root of 22, square root of 23, square root of 24, square root of 25
square root of 22
square root of 23
square root of 24
square root of 25

Answers

Answer:square toot of 25v

Step-by-step explanation:because the square root of 25 is 5 which is an integer

Answer:

Square root of 25 is rational

Step-by-step explanation:

5x5 is 25, so the square root of 25 is 5, which is a rational number.

free brainliest help asap pls

Answers

Answer: The mean would be 19

Step-by-step explanation:

Answer:

19!!!

Step-by-step explanation:

Someone help me plssssssssssss I’m taking a test

Answers

Question 10 is growth

A pool estimate that 43% of likely voters are in favor of additional restrictions on teen drivers the Poll has a margin of error of plus or minus 4%. Write and solve the absolute value equations to find the minimum and maximum percent of voters that support the restriction

Answers

Answer:

Kindly check explanation

Step-by-step explanation:

Given that :

Estimated number of voters in favor of additional restriction = 43%

Margin of Error = ±4%

Write and solve the absolute value equations to find the minimum and maximum percent of voters that support the restriction:

Minimum percentage of voters = 4% lesser than the estimated number of voters

Maximum percentage of voters = 4% greater than the estimated number of voters

Let number of voters = v

|v - 43%| = ±4%

v = - 4% + 43% = 39% = minimum percentage

v = +4% + 43% = 47% = maximum percentage

39% ≤ v ≤ 47%

Graph the line with the equation y = x + 6.

Answers

Answer:

Hi there!

Your answer is:

Based off the equation we know that the slope is 1 and the y intercept is 6. We know that slope is rise/run so it goes UP one unit for every unit it goes RIGHT! We must start at the point (0,6) because that is the y intercept

I WILL GIVE BRAINLIEST PLEASE HELP QUICK!!!!!!!!!!! To the nearest minute, how much time could Robert save on a 60 mile trip if he drove at 70 mph rather than at 50 mph?

Answers

Answer:

12 minutes

Step-by-step explanation:

Given the question :

how much time could Robert save on a 60 mile trip if he drove at 70 mph rather than at 50 mph?

Time taken to cover 60 miles at a speed of 50 miles per hour

Recall :

Time taken = distance / speed

Hence, at Speed = 50 mph

Time taken = 60/50

Time taken = 1.2 hours = (1.2 * 60) = 72 minutes

At speed = 70mph

Time taken = 70/50

Time taken = 1.4 hours = (1.4 * 60) = 84 minutes

Time saved :

(84 - 72) = 12 minutes

someone please helpppp!!!!!!!!!!!!!!!!

Answers

Answer:

41990400x

Step-by-step explanation:

Do [tex]6^{8}[/tex] times [tex]5^{2}[/tex] 1679616 * 25=41990400x

Use rounding to estimate.

1. 2.34 + 1.9 + 5.23
2. 10.39 - 4.28

Answers

Answer:

1. 9.47

2. 6.11

Step-by-step explanation:

Question 1 : 2.34 rounded to 2
1.9 rounded to 2
5.23 rounded to 5.
2 + 2 + 5 = 9 estimated

Question 2 : 10.39 rounded to 10
4.28 rounded to 4. 10 - 4 = 6 estimated.

Hope this helped!!!

Jada, Diego, and Elena each use the same spinner that has 4 sections marked A, B, C , and D. Which estimate do you think is most accurate? Jada says, "The probability of spinning B is 0.3 because I spun 10 times, and it landed on B 3 times. " Diego says, "The probability of spinning B is 20% because I spun 5 times, and it landed on B twice." Elena says, "The probability of spinning B is 2/7 because I spun 7 times, and it landed on B twice."

Answers

Answer:

The correct option is;

"The probability of spinning B is 0.3 because I spun 10 times, and it landed on B 3 times."

Step-by-step explanation:

Out of the three trials, Jada had the most number of trials (10) and therefore, the highest precision value and the best estimate out of the three   persons that did the trials

The more the sample or trials increase, the more the precision increases as the number of trial comparisons and testing increases.

The increased trials give more information, resulting in a more precise estimate. It also increases the confidence in the result and reduces the amount of uncertainty and increases precision of the results.

2.33931 rounded to the nearest tenth

Need fast answers !!

Answers

Answer:

2.3

Step-by-step explanation:

the answer is 2.3

since the number next to the tenth place is three nothing needs to be rounded up

Use this order of operation to evaluate this expression

Answers

The answer is twelve

Gemla walks 3/4 of a mile in 1/4 of an hour. How many miles per hour is Gemia
walking

Answers

Answer:

3 miles per hour

Step-by-step explanation:

hope it helped.

A store sells 3 different sizes of the same juice. The 8 ounce bottle costs $2.96, the 16 ounce bottle costs $5.44, and the 24 ounce bottle costs $9.36. Which size bottle is the better buy?

Answers

Answer:

24 ounce bottle.

Step-by-step explanation:

8 Ounce bottle=2.7 for each ounce

16 ounce bottle=2.9 for each ounce

24 ounce bottle=2.6 for each ounce

pls solve for x thank you

Answers

Answer:

get the value of x ba ang question

Answer:

x=3

Step-by-step explanation:

Subtract 1/2 from both sides then simplify to get : 3x/2 = 9/2

Eliminate denominators and simplify : 3x=9

Divide by the same factor : x=3

Which graph represents a function

Answers

Answer:

the bottom right graph represents a single function.

Step-by-step explanation:

Michael wants to buy a new car the car dealership has six read new cars five red used cars three silver new cars and seven silver used cars in how many ways can Michael choose a car if he wants either use a used car a silver car

Answers

Answer:

Step-by-step explanation:

6 new red cars

5 used red cars

3 new silver cars

7 used silver cars

Out of all the cars

10/21 (47.6%) chance of picking a silver car

3/21 (14%) of picking a NEW silver car

7/21 (33%) of picking a USED silver car

Out of the Silver cars

3/10 (30%) of picking a NEW used silver car

7/10 (70%) of picking a USED silver car

Please help anyone? I need help w this homework

Answers

Answer: 1st option, 3rd option, 1st option

Step-by-step explanation:

PLZ HELP ASAP WILL MARK BRAINLIEST

Answers

Answer:

A value is 6.

Step-by-step explanation:

Other Questions
Round seeds (R) are dominant to wrinkled seeds (r) in pea plants. Cross two heterozygous pea plants. What is the probability the offspring will have round seeds? 7/8 divided by 3 1/4 5n - 3 = 6??????????? what is the greatest common factor of 27 and 18? Simplify 135 +3521261651610 Please help me what do I graph ? (Slope) PLEASE HELP!!!!! answer 6 multiple choice questions for 100 points!!! Anyone who answers will get brainliest!!!! Choose the correct adjective of nationality that best completes the sentence. Pay attention to gender and the number of adjectives and nouns.1) El Da de Los Muertos en Guatemala es distinto. La gente ________ celebra sus antepasados con cometas grandes.a. guatemaltecob. guatemaltecac. guatemaltecasd. guatemaleos2) El Canal ___________ es un sitio importante para el mundo. Corre por la selva de Panam y conecta el ocano Atlntico con el Pacfico.a. Panameob. panameosc. panameod. panamea3) Hay dos chicas de Quito, Ecuador este ao. Son estudiantes extranjeras _____________.a. ecuatorianosb. ecuadoreasc. ecuatoriand. ecuatorianas4) Las playas _________________ son las ms bonitas del mundo. Quiero visitar Costa Rica para una vacacin.a. costarricenosb. costarricanasc. costarricensed. costarricenses5) El producto ms popular de Espaa es la aceituna _______________.a. espaolab. espaoloc. espaold. espaoles6) Asuncin, Paraguay es la ciudad _____________ ms poblada.a. paraguanb. paraguayac. paraguayosd. paraguayo A scientist is unsure about the accuracy of her experiment. She has checked her equipment and found it to be in good working order, checked her data and found it to be accurate, and reviewed her interpretation of the data, which she found to be logical. What should she do in addition to check the accuracy of her results? Add -4 + 2/3ASAP plz find the distance between the points -5,7 ; -1,3 HELP ME PLEASE...!?!?!?!1. Some jobs in the Construction pathway (such as framer) involve working outside on the building project itself, while others (like project manager) involve scheduling and planning in an office setting. Why could we say that these two jobs are part of the same career cluster? 2. Dale works in a factory that manufactures pens. The factory has a lot of robotic machinery that is designed to produce all the different parts of a pen in an amazingly fast period of time. Workers on the floor are on hand to stock materials into the machines so that the pens can be assembled and boxed. Dale is a Quality Assurance Supervisor. When a box of pens is delivered to Dales station, what might he be looking for? 3. Randall and Kim both work for a package delivery company. Randall drives a delivery truck and Kim manages the incoming and outgoing packages from her office. Even though they work for the same company, describe the different duties Randall and Kim have. Select ALL of the situations that describe Newton's Second Law. (There may be more than 1 answer) Question 9 options: A cart is rolling at a constant velocity An apple is in free fall A marble is accelerating down a ramp An ice skater is sliding across frictionless ice A car is at rest A rolling chair is slowing down A roller coaster changes directions What role did merchants play in the slave trade? Why were ziggurats so large? How many Africans were laboring on plantations and mines in the America by 1650? Help me please ASAP !! I will mark brainliest 300 *RationalIrrationalRational, IntegerRational, Integer, Whole HELP ME PLZZ !!! I DONT WANT TO FAIL!!! Solve for d:3+d what determines whether an atom will form a bond with another atom