John missed 4 problems on a test but did 75% of them correctly. How many problems
were there in the test?

Answers

Answer 1

Answer:

16

Step-by-step explanation:

he missed 25%

if 4 = 25% then 16 questions total

4*4=16 and 25% * 4 = 100%

Answer 2

Answer: 16 problems

Step-by-step explanation:

First find out how many John got wrong. 100%-75%=25%. Then do cross multiplication: 4*100=25x; 400=25x. Divide 25 on both sides and... BOOM! you get 16 problems.


Related Questions

Point Z (-3, 4) is translated using the (x, y) (x + 2, y-1). It is then reflected across the x-axis
Determine the point location of the image.

Answers

This is the new coordinate for Z  (-1, 3)

What is graph?

A graph can be defined as a pictorial representation or a diagram that represents data or values.

The point Z is (-3, 4) is translated using the rule

x,y  → (x+2),(y-1)

Then simply plug-in the values of x and y which are x = -3 and y = 4

x,y → ((-3) +2), (4 -1)  which is (-1, 3)

Hence, this is the new coordinate for Z  (-1, 3)

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Answer two questions about Systems AAA and BBB:
System AAA \text{\quad}start text, end text System BBB
\begin{cases}6x-5y=1\\\\-2x+2y=-1\end{cases}









6x−5y=1
−2x+2y=−1

\begin{cases}4x-3y=0\\\\-2x+2y=-1\end{cases}









4x−3y=0
−2x+2y=−1

1) How can we get System BBB from System AAA?
Choose 1 answer:

(Choice A, Checked, Correct)
CORRECT (SELECTED)
Replace one equation with the sum/difference of both equations

(Choice B, Incorrect)
INCORRECT
Replace only the left-hand side of one equation with the sum/difference of the left-hand sides of both equations

(Choice C, Incorrect)
INCORRECT
Replace one equation with a multiple of itself

2) Based on the previous answer, are the systems equivalent? In other words, do they have the same solution?
CORRECT (SELECTED)
Yes

Answers

For the given systems A and B:

1) Replace the first equation of A by the sum between the two equations of A.

2) Yes, the systems are equivalent.

How to get system B from system A?

Here we have the two systems of equations:

A:

6x - 5y = 1

-2x + 2y = -1

B:

4x - 3y = 0

-2x + 2y = -1

The second equation is the same in both systems, so we only look at the first equations.

In A we have:

6x - 5y = 1

If we add the second equation of A, then we get:

(6x - 5y) + (-2x + 2y) = 1 + (-1)

4x - 3y = 0

This is the first equation of B.

Then we need to replace the first equation by the sum between the first and second equations.

2) Are the systems equivalent?

Yes, because we did not "modify" system A, we just rewrite it and we got system B, then both systems have the same solutions.

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Answer: A) , Yes

Step-by-step explanation:

What is the value of f(x) when x = 4 in the piecewise function f(x) =
2x² when x>4 …….. 4x when x < 4

Answers

The question asks the value of f(x) when x = 4 in the equation

x = 4 is less than or equal to 4, so we use the first equation in the piecewise functions => {4x when x≤4}

Solving for f(x):

4(4)=16

16 is the answer!

Hope it helps!

Type your answer into the box. 7.3 m 6 m cm³ Q The width of a cuboid is 6 metres, the length is 7.3 metres and the height is 4.2 metres. Dulce Livramento 4.2 m What is the volume of the cuboid? Type your answer into the box . 7.3 m 6 m cm³ Q The width of a cuboid is 6 metres , the length is 7.3 metres and the height is 4.2 metres . Dulce Livramento 4.2 m What is the volume of the cuboid ?​

Answers

The volume of the cuboid is 183.96 m³

What is the volume of a cuboid?

A cuboid is a plane shape with a six-faced solid called a hexahedron. The volume of a cuboid is Length × width × height

From the information given:

The length of a cuboid is = 7.3 metresThe width = 6 metresThe height = 4.2 metres

The volume of the cuboid is;

=  (7.3 × 6 × 4.2) m³

= 183.96 m³

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6. The product of two numbers is 18.576. If one of them is 5.4, find the other .​

Answers

Answer:

3.44

Step-by-step explanation:

Another way to rewrite this question is 18.576/5.4. (18.576 divided by 5.4), and the answer to that is 3.44.

in a class of 28 students everyone like math, english, or both. if 17 like math and 19 like english how many like both?

A) 2
B) 8
C) 16
D) 20
E) 28

Answers

Answer:

B) 8 students like both

===========================

Let the numbers be:

M - likes math, M = 17;E - likes English, E = 19;B - likes both, B is unknown;T- total number, T = 28.

Since both M and E include B, we can show the total as:

Math only + English only + Both = Total

and

Math only = M - BEnglish only = E - B

The total can be expressed as:

M - B + E - B + B = T M + E - B = T

Substitute values and solve for B:

17 + 19 - B = 2836 - B = 28B = 36 - 28B = 8

This is matching the answer choice B)

Maths be A and English be B

A+B-A[tex]\cap[/tex] B=AUB

A intersection B be X

(A-X)+(B-X)+X=AUBA+B-X=2817+18-X=1835-X=28X=8

Option B

San is currently three times Harry's age. Sam's age is also 10 more than twice Harry's age. the following systems of equation models this scenario. x=3y, x=10+2y​

Answers

Step-by-step explanation:

so, what do we need to do ?

just solve these equations and find Sam's age (and Harry's) ?

x = 3y

x = 10 + 2y

so, we simply use the first equation in the second :

3y = 10 + 2y

y = 10

x = 3y = 3×10 = 30

Sam is currently 30 years old, Harry is 10.

Which equation represents a line that passes through (-2, 4) and has a slope of 2/5

Answers

An equation represents a line that passes through (-2, 4) and has a slope of 2/5 is y-4 = 2/5(x+2)

Equation of a line

The equation of a line in point-slope form is expressed as;

y-y1 = m(x - x1)

where

m is the slope

(x1, y1) is any pint on the line

Substitute the given parameter

y - 4 = 2/5(x-(-2))

y-4 = 2/5(x+2)

Hence an equation represents a line that passes through (-2, 4) and has a slope of 2/5 is y-4 = 2/5(x+2)

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Suppose you have 7 red cards, 9 green cards, and 12 blue cards. The cards are well shuffled, and you randomly draw one card How many elements are there in the sample space?
Find the probability of drawing a green card
How many elements are there in the sample space?

Answers

There are 28 elements in the sample space and the probability of a green card is 9/28

The elements in the sample space?

The given parameters are:

Red = 7

Green = 9

Blue = 12

The elements in the sample space is:

Elements =7 + 9 + 12

Evaluate

Elements = 28

Hence, there are 28 elements in the sample space

The probability of green?

This is calculated as

P =Green/Elements

So, we have:

P = 9/28

Hence, the probability of a green card is 9/28

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I am a 3-digit odd number.
The sum of my digits is 9.
My tens digit is twice that if my hundreds digit.
What am I?

Answers

After a long evaluation of counting math, I found that your number is 621.

How and why?

Well, 6 + 2 + 1 = 9, as you already may be aware of. I got this number because it is a three-digit odd number, it sums up to 9, and the tens digit (2) is twice that (or two times the value of) the hundreds digit (1). This one took quite a while, but after listing them, I have prepared my answer and explanation for you! If you need help, let me know and I will gladly assist you.

Answer:

Step-by-step explanation:

let the number at unit place=x

ten's place=y

hundred's place=z

x,y,z are integers.

x+y+z=9

also digit=100z+10y+x

y=2z

x+2z+z=9

x+3z=9

x=1,3,5,7,9

for x=1

1+3z=9

3z=9-1=8

z=8/3 (rejected as z is an integer.)

when x=3

3+3z=9

3z=9-3=6

z=6/3=2

z=2

y=2z=2×2=4

so number=100×2+10×4+3=200+40+3=243

30 245x-1) (x³+3) 30 245x - 1 ) ( x³ + 3 )​

Answers

Answer:

30245x⁴ - x³ + 90735x - 3

Step-by-step explanation:

1. Expand the expression

(30245x - 1)(x³ + 3)

2. Multiply

30245x x + 30245x x 3-(x³ + 3)

3. Determine the sign

304245x⁴ + 90735x - (x³ + 3)

4. Rewrite the expression

30425x⁴ + 90735x - x³ - 3

= 30245x⁴ - x³ + 90735x - 3

(brainliest will be appreciated :)

Why is it most logical to let x represent Dianna’s current age?

Answers

Answer:

In 3 years, Dianna will be 4 times as old as she was 33 years ago. How old is Dianna now?

Choose the most logical value for the variable to represent.

x= Diana's age now

This question is impossible to fully answer without further context. (Who is Dianna? Why do we need her age?)

However, it can be noted that [tex]x[/tex] is easily the most common variable name whenever you have a missing value in an equation. Generally, it is understood by mathematicians that [tex]x[/tex] and most other letters denote an unknown value, something to either use in solving the equation or something to find on its own.

Type the correct answer in each box. Use numerals instead of words.

Functions f and g are represented in the table and the graph.

Answers

The values of the functions from the graph and table are; (f ° g)(4) = 4 and x = 0 at  (g ° f)(x) = 1

How to solve function inputs?

1) We want to find the value of (f ° g)(4). This can also be expressed as;

f(g(4))

Now, from the given graph, g(4) = 2. Thus;

f(g(4)) = f(2)

From the table, f(2) = 4. Thus;

(f ° g)(4) = 4

2) We are given; (g ° f)(x) = 1

This is also expressed as;

g(f(x)) = 1

From the graph g(x) = 1 is at x = 1. Thus;

f(x) = 1 and from the tabe;

x = 0 at f(x) = 1

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help me help me help help help me​

Answers

Answer:

b. 0

c. 4

d. 2

e. [tex]\frac{76}{35}[/tex]

Step-by-step explanation:

b.) When translated it will become this expression 10 - [(2x15)/3] = 0

c.) It will become [tex]\frac{4(12-7)}{5}[/tex]

d.) This will transform to  [tex]\frac{(\frac{78-13}{5}) + 5}{9}[/tex]

e.) The first eq is [tex]\frac{4(7+3)}{8}[/tex], then after the changes it becomes [tex]\frac{4[\frac{(7+3)+9}{7}]}{5}[/tex]

(a) Using the digits 0 to 7 exactly once each, form a collection of positive integers whose sum is 100.
(b) Find a second solution to (a) which has a different number of integers in the sum.
(c)Show that in any solution (a), the sum of the digits in the units places is 20.
(d)Find, with reasons, the smallest possible value of the largest integer in a solution to (a).

Answers

A) The collection of positive integers whose sum is 100 are: 23, 17, 6, 54, 0.

B) Another collection of positive integers whose sum is 100 are: 13, 27, 4, 56, 0.

C) Due to the fact that the units can be commuted, their sum is always equal to 20.

D) The smallest possible value is 0 and the largest is 57.

What is the sequence of positive integers?

A) The formation of a collection of positive integers can be done by trial and error. For example, only using the digits {0, 1, 2, 3, 4, 5, 6, 7}.

For example, we can have;

23 + 17 + 6 + 54 + 0 = 100

Where the numbers used are: 23, 17, 6, 54, 0.

B) Another example is;

13 + 27 + 4 + 56 + 0 = 100

C) If we add the units digits of these 5 numbers, we get:

3 + 7 + 6 + 4 + 0 = 20

Now, if we compute the units digits between the different numbers, to get for example: 27, 13, 6, 54, 0

The sum is still equal to 100, and the units digits are the same ones, so we still have that the sum of the units digits is equal to 20.

d) The smallest integer that we use is 0.

For the largest we just commute the tens and units digits so we make the larger integer possible, which is:57.

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In a catalog, movies are identified by an ID number—2 letters followed by 3 digits.Repetitions are permitted. How many catalog numbers can be made?What is the probability that the ID number is divisible by 5? (Include the 2 letters in the ID number.)

Answers

Using the Fundamental Counting Theorem, it is found that:

676,000 catalog numbers can be made.There is a 0.2 = 20% probability that the ID number is divisible by 5.

What is the Fundamental Counting Theorem?

It is a theorem that states that if there are n things, each with [tex]n_1, n_2, \cdots, n_n[/tex] ways to be done, each thing independent of the other, the number of ways they can be done is:

[tex]N = n_1 \times n_2 \times \cdots \times n_n[/tex]

For the 2 letters(26 outcomes each), and 3 numbers(10 outcomes each), we have that the parameters are:

[tex]n_1 = 26, n_2 = 26, n_3 = 10, n_4 = 10, n_5 = 10[/tex]

Hence the number of catalog numbers is:

[tex]N = 26^2 \times 10^3 = 676000[/tex]

The ID number is divisible by 5 if the last digit is either 5 or 0, hence [tex]n_5 = 0[/tex] and the probability is:

[tex]p = \frac{26^2 \times 10^2 \times 2}{26^2 \times 10^3} = 0.2[/tex]

There is a 0.2 = 20% probability that the ID number is divisible by 5.

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factor equation. answer is -47, just puzzled on how to get it. step by step

Answers

Answer:

-47

Step-by-step explanation:

First you use PEMDAS, so you start with the exponent.

-5^2 = 25

Then you multiply the -2!!! Not the 2 with the 25, multiplying the 2 is a common mistake.

When you multiply the -2, it results in:

3 - 50

= -47

Answer:

-47

Step-by-step explanation:

Original Equation:

[tex]f(-5)=3-2(-5)^2[/tex]

Square the -5 (this cancels out the negative sign

[tex]f(-5)=3-2(25)[/tex]

Multiply 2 and 25

[tex]f(-5) = 3-50[/tex]

Subtract 50 from 3

[tex]f(-3) = -47[/tex]

I'm a bit confused by what you mean factor the equation? Given the context. But I'm going to assume the equation is: [tex]f(x)=3-2x^2[/tex]. Which isn't exactly factorable.

please solve it?
1. 3q4 × 2q5 ÷q3
2. 4-²
3. 16^1/2
4.4°

Answers

Un clear on what the question is

A printer designs a tag in the shape of a circle with a smaller circle cut out. She cuts her prototype from a 5 in. by a 7 in. index card. The cut edges of the tag will be printed with gold leaf. What is the approximate amount of gold leaf on a tag?

The circumference of the larger circle is about ____ inches. The circumference of the smaller circle is about ____ inches. So, the total length of gold leaf on a tag is approximately
____ inches.

Answers

The circumference of the larger circle is about 12.57 inches. The circumference of the smaller circle is about 3.14 inches. So, the total length of gold leaf on a tag is approximately 15.71 inches.

How to illustrate the circle?

The circumference will be:

= 2πr

= 2 × 3.14 × 2

= 12.57 inches.

The circumference of the smaller circle will be:

= 2πr

= 2 × 3.14 × 0.5

= 3.14

The total length will be:

= 12.57 + 3.14

= 15.71 inches.

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Describe how to transform the graph of g(x) - Inx in the graph of f(x) - In (-x)-9.

a. Reflect across the y-axis and translate 9 units to the left

b. Reflect across the x-axis and translate 9 units to the left

c. Reflect across the x-axis and translate 9 units to down

d. Reflect across the y-axis and translate 9 units to down

Answers

Answer:

  d. Reflect across the y-axis and translate 9 units to down

Step-by-step explanation:

Reflection of the graph of a function across the y-axis is accomplished by replacing x with -x in the function definition.

Translation of the graph of a function by k units upward is accomplished by adding k to the function value.

Application

Here, we observe that f(x) is g(x) with x replaced by -x. That means the graph of f(x) will be the graph of g(x) reflected across the y-axis.

The function f(x) is the function g(x) with -9 added to it. That translates the graph downward by 9 units.

These transformations, reflection across the y-axis and translation 9 units downward, can be seen in the attached graphs. Corresponding points are marked.

a line of best fit was drawn for 15 data points. what is the maximum number of these data points that may not actually be on the line?

Answers

The maximum number of the data points that may not actually be on the line is 15

How to determine the number of data points?

The number of points is given as:

Points = 15

A line of best fit implies that the model is a regression model

In a regression model, all the data points may not pass through the line of best fit.

This means that the maximum number of the data points that may not actually be on the line is 15

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Brainliest to whoever answers accurately

Answers

Answer:  [tex]a_{n}=5000(1.02)^{n-1}[/tex]

Step-by-step explanation:

to get the rate do:

5100/5000 to get 1.02

Also for geometric sequence, the exponent 'n' is always subtracted by 1

Therefore, your answer is:

[tex]a_{n}=5000(1.02)^{n-1}[/tex]

find x and y.

please help !

Answers

Using linear pairs,

[tex]115+5x=180\\\\5x=65\\\\x=\boxed{13}[/tex]

By the exterior angle theorem,

[tex]2y=45+5(13)\\\\2y=45+65\\\\2y=110\\\\y=\boxed{55}[/tex]

3: Morgan Cruise earns net self-employment income of $221,600. She works a second job from which she receives FICA taxable earnings of $111,300.00.
Self-Employment tax =
137,700 cap

Answers

Based on the amounts that Morgan Cruise is getting paid, her self-employment tax will be $22,916.63.

How much does Morgan pay in self-employment tax?

taxable earnings from self-employment:

= 92.35% x 221,600

= $204,647.60

Self-employment tax is:

= (12.4% x 137,700 limit) + (2.9% x 200,000 limit) + (0.9% x (204,647.60 - 200,000)

= 17,074.80 + 5,800 + 41.83

= $22,916.63

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How to solve exercise 1

Answers

Answer:

[tex]period \: of \: sin(2x) = \pi \\ period \: of \: cos \frac{x}{4} = 8\pi \\ period \: of \: tan \frac{x}{3} = 3\pi[/tex]

Step-by-step explanation:

Hello !

[tex]periodicity \: of \: a.sin(bx + c) + d = \\ \frac{periodicity \: of \: sin(x)}{ |b| } \\ periodicit \: of \: sin \: (x) \: is \: 2\pi = \\ \frac{2\pi}{2} \: simplify = \pi \\ periodicity \: of \: a.cos(bx + c) = \\ \frac{periodicity \: of \: cos(x)}{ |b| } \\ periodicit \: of \: cos \: (x)is \: 2\pi = \\ \frac{2\pi}{1\frac{1}{4} } \: simplify \: = 8\pi \\ periodicity \: of \: a.tan(bx + c) = \\ \frac{periodicity \: of \: tan(x)}{ |b| } \\ periodicity \: of \: tan(x) \: is \: \pi \\ \frac{\pi}{} \frac{1}{3} [/tex]

what is the constant of variation?

Answers

Answer:

constant (unchanged) ratio of two variable quantities

Step-by-step explanation:

y = k x ( or y = k x )

y = 15 when x = 24, find x when y = 25. find the constant of variation.

here is a gauge for the fuel tank of a car the fuel tank hols 52 litres of fuel when the tank is full the tank is 1/4 full of fuel
work out how many more litres of fuel are needed to fill the tank

Answers

Answer is 39 Liters

When a numberis decreased by 20% of itself the result is 64

Answers

Answer:

80

Step-by-step explanation:

100% - 20% = 80% = 64

so

64 : 80 * 100 = 80

check

80 - 20% = 64

f(x) = x/2 - 3 and g(x) = 3x² + x − 6, find (f+ g)(x)

Answers

Answer:

3x^2+3x/2-9

Step-by-step explanation:

collect like term

Algebra
Help me with this question

Answers

Answer:

SORRY I CAN NOT HELP YOU

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