Mathematics High School

After 4 new students joined a class, the class had 32 students.
Which equation can be used to find x, the number of students in the class before the students joined?
A. x/4 = 32
B. x - 4 = 32
C. 4x = 32
D. x + 4 = 32


Answers

Answer 1
D
Explain: if 4 new students joined, that’ll add up to the original number which is x.
So the equation will be x + 4 = 32

Related Questions

Solving for the missing side of the triangle , please help

Answers

Answer:

C=78

Step-by-step explanation:

first add 72 and 30 you get 102 then subrtract 102 from 180 and youll get your answer of 78

Simplify the expression 4(x + 5) - 3(7 + x)

Answers

Answer:

x-1

Step-by-step explanation:

Answer:

x - 1

Step-by-step explanation:

4(x+5)-3(7+x)

4( x + 5) = 4x + 20

4x+20-3(7+x)

-3(7 + x) = -21 - 3x

4x+20-21-3x

4x + 20 - 21 - 3x = x-1

1. Mr. Jones is correcting math test. Here are the scores for the
first fourteen tests he corrected 62, 65,93, 51, 55, 12,79,
85, 55, 72, 78, 83, 91, and 76. Which score does not seem
to fit the data? Explain how the outlier score affects the
mean and the median of the data.

Answers

Answer:

12

Step-by-step explanation:

12 doesn't fit the data because it is so much farther from the general average of the others.

12 affects the median because with it, the median is 74. but without 12, the median is 76.

12 affects the mean because with it, the mean is 68.36. but without 12, the mean is 72.69.

Solve the equation.
-4(2: + 6) - 12 = 4

Answers

-4x 2/6-12=4
-4x2/6-12=4
-8/6-12=4
-40/3=4
No solution

PGR is a right-angled triangle.

Work out the size of angle PGR. Give your answer correct to 1 decimal place.

Answers

Answer:

PQR = 67.4 degrees

Step-by-step explanation:

Here, we want to find the size of PQR

to do this, we proceed as follows

As we can see PR is the opposite while PQ is the hypotenuse

The trigonometric identity connecting the two is the sine

sine is the ratio of the opposite to the hypotenuse

sin Q = 12/13

Q = sin^-1(12/13)

Q = 67.4 degrees

so can someone like pls help me what's -20×-18=​

Answers

Answer:

360

Step-by-step explanation:

-20x-18=20x18=360

Answer:

-2(10x+9)

Step-by-step explanation:

PLSSSS help ASAPPPPP

Answers

Answer: The amount of hotdogs you would need to sell in order to reach $300= 80

Step-by-step explanation:

Find how much money is spent per hotdog:

140÷70=2

$140= Amount made by selling 70 Hotdogs

70=Amount of Hotdogs sold already

Dividing 140 by 70 will get you the cost of 1 hotdog. This is due to division being the act of separating something into parts. There are 70 parts (or hotdogs) in this equation so therefore by separating the amount of money made by those selling those parts, the amount per hotdog would be found.

      2. Find the amount of hotdogs it would take to earn a total of $300:

300-140= 160  160÷2= 80

The question asks for a total of $300 to be earnt by selling hotdogs. $140 has already been earnt, therefore a portion of the total amount has been made. By subtracting the amount already made by the total amount of money that is wanted to be earnt, the amount of money needed to reach the $300 is found. The $160 is then divided by the amount of money spent per hotdog ($2). The answer (80) is the amount of hotdogs required to be sold to reach the goal of $300.

The post office charges forty- six cents for the first ounce shipped, and thirty-three for each additional ounce. How much does it cost to ship a package which weighs 22 ounces

Answers

Answer:

300

Step-by-step explanation:

2 6

Drag each equation to show if it could be a correct first step to solving the
equation
3(x+8)= 42.


Put in Yes, No, or Not Enough Information category.

Answers

Answer:

The first step to solving the  equation is:

[tex]3x+24 = 42[/tex]

Hence, 3x + 24 = 42 is the correct option.

Step-by-step explanation:

Given the equation

[tex]3(x+8)= 42[/tex]

First of all, we need to apply the distributive law on the left side of the equation to expand the equation.

[tex]\quad \:a\left(b+c\right)=ab+ac[/tex]

So the equation would be expaneded using the distributive law on the left side of the equation

[tex]3(x+8) = 42[/tex]

[tex]3x+24 = 42[/tex]        ∵ a(b+c) = ab + ac

Therefore, the first step to solving the  equation is:

[tex]3x+24 = 42[/tex]

Hence, 3x + 24 = 42 is the correct option.

Answer: Just switch the two I got wrong, and you'll get them all right!<3

Step-by-step explanation:

Write down the smallest integer value of z which satisfies the inequality: 2z + 2 >(smaller or equal to) 7?

Answers

Answer:

z> 5 /2

Step-by-step explanation:

(4/5)^2+ 2/5 ÷ 1/2( these are fractions and the 2 is a exponent) hurry up please

Answers

Answer:

Step-by-step explanation:

Can you help my sister

Answers

Answer:

40

Step-by-step explanation:

The teacher ordered 5 pizzas with 8 slices each which is 5*8=40

{(4,7),(2,5),(6,0),(4,_)} If this is a relation
is a function, then what number must
fill in the blank?

Answers

Answer:

Ans: The number will be six (6)

The diagram shows a square with a perimeter of 20 cm.
Not drawn
accurately
Eight of these squares fit together to make a rectangle.
Not drawnaccurately
What is the perimeter of the rectangle?​

Answers

Basically that’s it but write it down by yourself

The perimeter of the rectangle is 70cm.

What is perimeter?

Perimeter is the total length of the sides of a two-dimensional shape.

What is the formula for the perimeter of square?

Perimeter of the square is given by

P = 4a

where,

a is the side length of the square.

P is the perimeter of the square.

What is the formula for the perimeter for the rectangle?

Perimeter of the rectangle is given by

P = 2( l + b)

Where,

l is the of the rectangle

b is the breadth of the the rectangle

According to the given question.

We have the perimeter of the square is 20cm.

⇒ 4a = 20

⇒ a = 5cm

⇒ Each side length of the square is 5cm

And a rectangle made of 10 squares.

⇒ length of the rectangle = 5×5 = 25cm

and the breadth of the rectangle = 2 × 5 = 10cm

Therefore, the perimeter of the rectangle = 2(25 + 10) = 2 × 35 = 70cm

Hence, the perimeter of the rectangle is 70cm.

Find out more information about perimeter of square and rectangle here:

https://brainly.com/question/17055034

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Part C Find the length and width of rectangle NEHI, and calculate its area.

Answers

Answer:

length of rectangle NEHI = NI = (38 – 8) = 30 feet

width of rectangle NEHI = NE = 5 feet

area of rectangle NEHI = length × width

= 30 × 5

= 150 square feet

Step-by-step explanation:

please help due asap jdbhdbdbd

Answers

Answer:

b

Step-by-step explanation:

Answer: b

Step-by-step explanation:

180°-116°=64°

Hey can someone please help me lol

Answers

Answer:

49.53 nautical miles

Step-by-step explanation:

Adding 36 and 21 we get 57 miles.

57 converted to nautical miles would be 49.53

Evaluate the function. f(x)=-4x^2+10 find f(-2)

Answers

Answer:

[tex]f(-2)=-6[/tex]

Step-by-step explanation:

[tex]f(x)=-4x^{2} +10[/tex]

At x=-2

[tex]f(-2)=-4(-2)^{2} +10[/tex]

[tex]f(-2)=-4(4) +10[/tex]

[tex]f(-2)=-16 +10[/tex]

[tex]f(-2)=-6[/tex]

Simplify 9x - 4 + 3x

Answers

Answer:

[tex]4(3x - 1)[/tex]

Step-by-step explanation:

[tex]9x - 4 + 3x[/tex]

Adding 9x & 3x gives 12x.

[tex] = > 12x - 4[/tex]

Now taking 4 common from both the terms , we get :-

[tex]4(3x - 1)[/tex]

What is 1/4 divided by 2

Answers

i think it’s 0.5 I’m not sure though

What is the slope of the line represented by the equation y = -1/2x +1/4?

Answers

Answer:

-1/2

Step-by-step explanation:

y = -1/2x + 1/4 is in slope y-intercept form : y = mx + b

m is slope

Slope = -1/2

What makes 3 +7 +2= +2 true?

Answers

I don’t know honestly!?!?

Answer:12

Step-by-step explanation:

2+8+6(24)73=12

Solve for c.
-5/8c = 20

A. c = -34

B. c = -32

C. c = 26

D. c = 28

Answers

Answer:

b

Step-by-step explanation:

solve for c by simplifying both sides of the equation then isolate the variable

2+2= 4 because there is too two's and there for it =4

Answers

Answer:

Yes, that is correct. Congrats 7 year old.

Step-by-step explanation:

2 plus 2 equals 4

:)

thanks for points

given g(x)=-×-4, slove for x when g(x)=10​

Answers

The answer is g(10)=-14

1 5/6 ÷ 3/5 x 2/11 = ?

please help! will give brainliest! also, please show all work, thanks!

Answers

Answer:

75/99

Step-by-step explanation:

Please show work lol, also Brainliest goes out to the correct answer

Answers

Answer:

Answer below

Step-by-step explanation:

-16x sq2 + 3 , have a good day.

help please.. quickly

Answers

Someone else is already helping your welcome so yes the number
You should Download Cymath that helps you

Find the value of x in the figure. 57 x+23 DUE AT 3PM 2/1 PLZ HELP WITH STEPS

Answers

Answer:

x = 100

Step-by-step explanation:

Since the two sides need to equal 180 degrees, we would have this as our formula: x + 23 + 57 = 180

23 + 57 is 80, and we subtract 80 from 180 to get 100 as our answer.

The required value of the variable x is 100, which is determined by the property of the supplementary angles.

As we know that supplementary angles are defined as when pairing of angles addition to 180° then they are called supplementary angles.

Here, the two sides must equal 180 degrees.

As per the property of supplementary angle, it can be written as:

x + 23 + 57 = 180

Apply the addition operation,

x + 80 = 180

x = 180 - 80

Apply the subtraction operation to get,

x = 100

Therefore, the required value of the variable x is 100.

Learn more about supplementary angles here:

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1) The bakers at Healthy Bakery can make 290 bagels in 10 hours. How many
bagels can they bake in 23 hours? What was that rate per hour?

Answers

Answer:

667 bagels in 23 hours

29 bagels per hour

Step-by-step explanation:

We first find the unit rate in bagels per hour.

(290 bagels) / (10 hours) = 29 bagels/hour

Now we find the number of bagels made in 23 hours.

23 hours * 29 bagels/hour = 667 bagels

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