7(x + 4) = -21 what is x in this problem?

Answers

Answer 1
X=-7
Sorry I can’t explain it! My device is really slow right now!
Answer 2

Answer:

-7

Step-by-step explanation:

7x+28=-21

7x=-49

x=-7


Related Questions

Suppose babies born in a large hospital have a mean weight of 3831 grams, and a variance of 108,900. If 65 babies are sampled at random from the hospital, what is the probability that the mean weight of the sample babies would be less than 3882 grams? Round your answer to four decimal places

Answers

Answer:

0.8944

Step-by-step explanation:

We start by calculating the z-score

To calculate the z-score, we shall need the standard deviation

Mathematically, standard deviation is square root of variance

that will be; SD = √108,900 = 330

Formula for z-score is;

x-mean/SD/√n

where n is 65 in this case

z-score = (3882-3831)/330/√65 = 1.25

The probability we want to calculate is;

P( X < 1.25)

we can use the standard normal distribution table for this

Using the table;

P( X < 1.25) = 0.89435 which is 0.8944 to 4. decimal places

Answer:

0.8944

Step-by-step explanation:

What is the image of (−8,2) after a reflection over the y-axis?

Answers

Answer:

8, -2

Step-by-step explanation:

Alinehasaslopeof 1/3 anda y-intercept of –5What isitsequationin slope-intercept form? Write your answer using integers, proper fractions, and improper fractions in simplest form.

Answers

Answer:

[tex]y = \frac{1}{3}x - 5[/tex]

Step-by-step explanation:

Given

[tex]slope\ (m) = \frac{1}{3}[/tex]

[tex]y\ intercept = -5[/tex]

Required

Determine the line equation in slope intercept

The equation of a line in slope intercept is:

[tex]y = mx + b[/tex]

Where

[tex]m = slope = \frac{1}{3}[/tex]

[tex]b = y\ intercept = -5[/tex]

So, [tex]y = mx + b[/tex] becomes

[tex]y = \frac{1}{3}x - 5[/tex]

Work out, giving your answer in its simplest form:
5/
14
x
7/
30​

Answers

x in (-oo:+oo)

((5/14)*x^7)/30 = 0

1/84*x^7 = 0 // : 1/84

x^7 = 0

x = 0

x = 0

HELP PLEASE!!! STATISTICS

Answers

Answer:

its b

Step-by-step explanation:

its b i for some reason got it right

Write an equation of the line in slope-intercept form that passes through ( -2, 5) and is parallel to y=4x.

A. Y=-2x+13
B. Y=4x-3
C. Y=-2x-3
D.y=4x+13

Answers

Parallel= same slope
Y = 4x + b
Plug in the point
5 = 4(-2) + b
5 = -8 + b
b = 13
It would be D. Y= 4x+13

Angie and Kenny play online video games. Angie buys 1 software package and 1month of gameplay. Kenny buys 1 software package and 2 months of game play. Each software package costs ​$30. If their total cost is ​$90​, what is the cost of one month of gameplay?

Answers

Answer: $10

Step-by-step explanation:

Angie buys = 1 software package and 1month of gameplay.

Kenny buys = 1 software package and 2 months of game play.

Cost of each software package = $30. Total cost = ​$90​

The total cost is the addition of what Kenny and Angie bought. This will be:

(1 SF + 1 G) + (1 SF + 2 G) = 90

where,

SF = software package = 30

G = game

(1 SF + 1 G) + (1 SF + 2 G) = 90

30 + 1G + 30 + 2G = 90

60 + 3G = 90

3G = 90 - 60

3G = 30

G = 30/3

G = 10

One month of game play cost $10

A soccer player passes the ball from a point that is 18 yards from the endline and 12 yards from the sideline. A teammate who is 42 yards from the same endline and 50 yards from the same sideline receives the pass. (See figure.) How long is the pass? (Round your answer to the nearest yard.)

Answers

The answer would be 44.9 yard.

The ratio of right-handed students to left-handed students is 8 to 3.There are 520 right-handed students in school.How many students are left-handed

Answers

Answer:

195 students are left-handed

Step-by-step explanation:

Here, we want to calculate the total number of students who are left-handed

Let the total number of students in the school be x

The total ratio is 8 + 3 = 11

8/11 * x = 520

8x = 11 * 520

x = (11 * 520)/8

x = 715 students

So the number of students who are left handed will be;

Total - number of right-handed students

That would be;

715-520 = 195

2. H(x) is a quadratic function and H(1) = 1, H(-2) = 16, and H(3) = 11. What is the value of H(-1)?

A. 7
B. 3
C. -3
D. 8
E 5

Answers

Answer:

d

Step-by-step explanation:

what is the restriction in the determining if the given equation is a polynomial?

Answers

Answer:

Polynomials are formed from sums of power functions – with one restriction. The restriction is that the powers must be non-negative integers – simple numbers like 0, 1, 2, 3, etc.

Step-by-step explanation:

what is 2(u-3)=6u+10

Answers

Answer: =-4

Step-by-step explanation:

what is 2+2 and what is your favorite song?

Answers

Answer:

2+2=4 and my fave song is blood in the water

Step-by-step explanation:

Mark Deathshot brainliest

Answer:

4 and i see a dreamer

Step-by-step explanation:

Karim wants the shed to be at least 4 feet wide. Now what are the possible
whole number side lengths for the shed that will cover an area of 36 square
feet?

Answers

Answer:

9

Step-by-step explanation:

because area = length times with so it also means area divided by with with = length

Zeke kicked a football 92 yards. Zane estimated it at 90 yards. What percent error did Zane make? If a decimal, round the percent to 2 decimal places.

Answers

Answer:

Zeke had a 2.17% margin of error in his estimation.

Step-by-step explanation:

To set this problem up, you would need to create a proportion. X, the percent of error you're trying to find, should be over 100%. It should look like:

2/92 = X/100

This would translate your terms, the distance the football was kicked, into percentage terms. You should have 2/92 rather than 90/92. 90/92 would give you how accurate Zeke's estimate was instead of is percent of error.

Cross-multiply your numbers:

(2)(100) = 92X

200 = 92X

X = 2.1739

Then, once you round it, your answer would be X = 2.17.

Select steps that could be used to solve the equation 1 + 3x = -x + 4.

A.subtract 1, add x, divide by 4
B.add x, subtract 4, divide by 4
C.add x, subtract 1, divide by 4
D.subtract 3x, subtract 4, divide by -4
E.subtract 3x, subtract 4, divide by 4

(More than one answer)

Answers

Answer:

A, C & D

Step-by-step explanation:

A) 1 + 3x = -x + 4  {subtract 1}

  1 + 3x -1 = -x + 4 - 1

       3x     = -x + 3         {add x}

     3x + x = -x + 3 + x

        4x    = 3       {Divide by 4}

       4x/x = 3/4

x = 3/4

C) 1 + 3x = -x +4            {Add x}

  1+ 3x + x = - x +4 + x      

   1 + 4x  = 4    {subtract 1}

        4x = 4 - 1

        4x = 3   {Divide by 4}

D) 1 + 3x = -x + 4        { Subtract 3x}

         1    = -x + 4 -3x

         1 = -4x + 4          Subtract 4}

      1 - 4 = -4x

        -3 = -4x              {Divide by -4}

       -3/-4 = x

x = 3/4  

          x = 3/4

Which equation is parallel to a line with a slope of 2 and passes through (2, -1)

Answers

Answer:

y=2x-5

Step-by-step explanation:

Mars is about 35,000,000 miles away from earth. If the moon is 250,000 miles away from earth, about how many times further is Mars?

Answers

Answer:

mars is 140 times farther than the moon

Step-by-step explanation:

hope this helped :-)

72 more females than males are enrolled in Archimedes High school. 60% of the students are female. What is the number of male students that are enrolled?

Answers

Answer:

115.2

Step-by-step explanation:

Answer:

360

Step-by-step explanation:

https://www.algebra.com/algebra/homework/Percentage-and-ratio-word-problems/Percentage-and-ratio-word-problems.faq.question.32852.html

Will mark brainliest - GEOMETRY, show work plz

Answers

Answer:

1. Slope is 3/2

2. Slope is -2/3

3. Slope is 3/2

Step-by-step explanation:

Plz mark as Brainliest!

Answer:

Step-by-step explanation:

(-8-4)/(5+3)= -12/8= -3/2

perp. 2/3

y - 4 = 2/3(x + 3)

y - 4 = 2/3x + 2

y = 2/3x + 6

y - 4 = -3/2(x + 3)

y - 8/2 = -3/2x - 9/2

y = -3/2x - 1/2

Why does the government issue only bonds, while companies issue both stocks and bonds?
a. The US government does not involve itself in the stock market because it does not want to risk
losing money if there should ever be a crash in the stock market.
Because the stock market is used as a form of gambling, the government refuses to associated
itself with the stock market as a way to discourage gambling.
Stock in a company gives the holder part-ownership of the company, with voting rights on big
decisions, and profits when the value goes up. The people already vote on happenings in the
government and inherently have ownership of the government.
d. A stock is a part ownership in a company, and the leaders of the government won't have the people owning the government.

Answers

Answer:

the answer is C

Step-by-step explanation:

Hence, option (C) is the correct answer.

What is a stock market?

The term stock market refers to several exchanges in which shares of publicly held companies are bought and sold.

Such financial activities are conducted through formal exchanges and via over-the-counter (OTC) marketplaces that operate under a defined set of regulations.

Stock in a company gives the holder part-ownership of the company, with voting rights on big decisions, and profits when the value goes up.

Hence, option (C) is the correct answer.

To know more about the stock market

https://brainly.com/question/3210355

#SPJ2

A hospital bill is estimated to be $480.00. It ends up actually costing the patient $524.50. What is the percent of error in the bill? Round to the nearest tenths place.

Answers

Answer: 8.484%

Step-by-step explanation:

The formula for percentage error is calculated as:

= (actual value observed - expected value) / expected value × 100

where,

Actual value observed = $480.00

Expected value = $524.50

Percent error = ($480.00 - $524.50)/$524.50 × 100

= -$44.50/$524.50 × 100

= -0.08484 × 100

= -8.484

= 8.484%

what the number 820.681 in expanded form using powers of 10

Answers

Answer:

[tex]820.681 = 8 \times 10^2 + 2 \times 10^1 + 6 \times 10^{-1} + 8 \times 10^{-2} + 1 \times 10^{-3}[/tex]

Step-by-step explanation:

[tex]820.681 = 8 \times 100 + 2 \times 10 + 6 \times 0.1 + 8 \times 0.01 + 1 \times 0.001[/tex]

[tex]820.681 = 8 \times 10^2 + 2 \times 10^1 + 6 \times 10^{-1} + 8 \times 10^{-2} + 1 \times 10^{-3}[/tex]

if n represents a number, write an expression that represents a number that is 5 less than n.

Answers

n-5

less than implies subtraction after the variable

Sydney is going to a carnival that has games and rides. Each game costs $1.25 and each ride costs $2.25. Sydney spent $24.25 altogether at the carnival and the number of rides she went on is 3 more than the number of games she played. Determine the number of games Sydney played and the number of rides Sydney went on

Answers

Answer:

8 rides and 5 games

Step-by-step explanation:

2.25x+1.25y=24.25      2.25(8)+1.25(5)=24.25         18+6.25=24.25

Can someone help me with the questions in the picture?

Answers

Answer:

9. Perpendicular

10. neither

11. Perpendicular

12. neither

Step-by-step explanation:

------------------

Slope Intercept Form: y = mx + b

* M is the slope

* B is the y intercept

------------------

Lines are parallel if they have the same slope (ex. If two equations have a slope of 2)

Lines are perpendicular if they have the opposite and the reciprocal slope (ex. If 1 equation has a slope of 3 and another equation has a slope of - [tex]\frac{1}{3}[/tex] )

------------------

9. Perpendicular: The slopes are reciprocal of each other and one of them is negative

10. Neither: The lines are not perpendicular because the slopes are both negative

11. Perpendicular: If you plot y=5 it is a horizontal line through 5. If you plot x=-3 it is vertical line through -3. These lines intercept and are perpendicular.

12. Neither: The slopes of both equations need to be the same to be parallel

Put both equations into y=mx+by = 1/2x -2 AND y = -1/2x -2

Avi uses a 3.5-m
ladder to climb up
to his tree house.
The foot of the
ladder is 0.8 m
from the tree. How
far
up
the tree does
the ladder reach?

Answers

It is still 3.5m because the tree is longer by 0.8m

Find the slope of the line that passes through the points (5,9) and (2,7).

Answers

2/3 is the correct answer for a line passing through the stated coordinates:)

Answer:

-2/3

Step-by-step explanation:

y2-y1 over x2-x1

Please help! 30 points!

Use the numbers:
6 3 5 4 2 1
in that order to make 100. Use brackets and the four operations.​

Answers

Answer:

((6 x 3 + 4/2) x 5 ) / 1

After traveling 345 miles, the Johnston family stopped at a rest stop for lunch. Looking at the map, they realized they had completed 3/5 of the trip. If d represents the total distance in miles, which equation can be used to find d?

A. 3/5 divided by d = 345
B. 3/5 x d = 345
C. 345 x d = 3/5
D. 345 divided by d = 5/3

Answers

Answer:

B

Step-by-step explanation:

Answer:

B. 3/5 x d = 345

Step-by-step explanation:

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