Mathematics High School

Use the digits 1-9 at lost one time each to make the equation true and give the solution

Answers

Answer 1

Answer:

[tex]2-3x=6x-7\\x=1[/tex]

(There are a lot more combinations tho. Read more!)

Step-by-step explanation:

The first thing to notice is that the answer has to be a whole number and that there are only 5 spaces.

Another thing to notice is that one of the x's is negative.

So the easiest thing is to set [tex]x=1[/tex].

The we can work backwards. There are multiple solutions that we can use. But any combination that adds to the same number will work.

Such as:

[tex]2-3x=6x-7\\x=1[/tex]

[tex]2-5x=3x-6\\x=1[/tex]

And so on.

Related Questions

Martina's inground swimming pool is finally finished, and all that's left to do is fill it with water. Martina's family decides to fill their pool using their garden hose to save money, even though they know it will take a really long time. The swimming pool is 10 meters long and 5 meters wide, and Martina's family wants the water to be 2 meters deep. Water from the garden hose flows at a rate of 2,500 liters, or 2.5 cubic meters, per hour.
How long will it take to fill the pool?
Write your answer as a whole number or decimal. Do not round.
hours

Answers

Answer:

40 hours

Step-by-step explanation:

Find the required water volume using the volume of prism formula

V = lwhV = 10*5*2 = 100 m³

Find the time required

100/2.5 = 40 hours

Answer:

40 hours

Step-by-step explanation:

The swimming pool can be modeled as a rectangular prism.

Volume of a rectangular prism

[tex]V = lwh[/tex]

where:

l = lengthw = widthh = height

First, calculate the volume of water needed:

Given:

l = 10 mw = 5 mh = 2 m

Substitute the given values into the formula and solve for V:

[tex]\implies V=10 \cdot 5 \cdot 2=100\:\: \sf m^3[/tex]

If the water flows as a rate of 2.5 m³/h, divide the volume by the rate to calculate how long it will take to fill the pool:

[tex]\implies \sf Time=\dfrac{Volume}{rate}[/tex]

[tex]\implies \sf Time=\dfrac{100}{2.5}[/tex]

[tex]\implies \sf Time=40\:\:hours[/tex]

Please help, thank you!

Answers

Answer:

Vertical Asympote, but I might be wrong, haven't done this math in years

HELP please this is due soon

Answers

Answer:

Step-by-step explanation:

Side Opposite to ∠x is called YZ

The side Opposite to ∠y is called XZ (that's the hypotenuse of the triangle)

Side Opposite to ∠Z is XY

Answer:

Side apposite to angle X is YZ

Side apposite to angle Y is XZ

Side apposite to angle Z is XY

Hope this helps you

have a great day

Tran has a credit card with a spending limit of $2000 and an apr (annual percentage rate) of 12%. during the first month, tran charged $450 and paid $150 of that in his billing cycle. which expression will find the amount of interest tran will be charged after the first month? (0.01) (300 dollars) (0.01) (450 dollars) (0.12) (300 dollars) (0.12) (450 dollars)

Answers

The expression that will find the amount of interest tran will be charged after the first month is: (0.01) (300 dollars).

Expression

First step

Monthly interest rate = (Annual percentage rate ÷ Number of months in a year)

Monthly interest rate= 0.12 ÷ 12

Monthly interest rate= 0.01

Second step

Amount left = Amount charged - Amount paid

Amount left = $450 - $150

Amount left = $300

Third step

Amount of interest=Monthly rate ×Amount left

Amount of interest=(0.01) (300 dollars)

Amount of interest=$3

Therefore the expression that will find the amount of interest tran will be charged after the first month is: (0.01) (300 dollars).

Learn more about expression here:https://brainly.com/question/11277823

find the measure of the missing angle?

Answers

56+72+x =180 ( therefore sum of angle in a triangle)

128+x=180

x=180-128

x=52

Answer:

THE MISSING ANGLE = 52°

Step-by-step explanation:

Sum of all angles = 18°0

Let the missing angle be x°

56° + 72° + x° = 180°

x° = 180° - 72° - 56°

x° = 52°

!!PLEASE PLEASE PLEASE PLEASE MARK ME THE BRAINLIEST!!

what is the solution for the equation -15=5(3y-10)-5y

Answers

Answer:

[tex]\Large\boxed{\sf{y=\dfrac{7}{2} }}[/tex]

Step-by-step explanation:

Isolate the variable of y from one side of the equation.

-14=5(3y-10)-5y

First, switch sides.

[tex]\sf{5\left(3y-10\right)-5y=-15}[/tex]

Use the distributive property.

DISTRIBUTIVE PROPERTY:

A(B-C)=AB-AC

5(3y-10)

Multiply by expand.

5*3y=15y

5*10=50

15y-50-5y

15y-5=10y

= 10y-50

10y-50=-15

Add by 50 from both sides.

10y-50+50=-15+50

Solve.

10y=35

Then, you divide by 10 from both sides.

10y/10=35/10

Solve.

Divide the numbers from left to right.

35/10=7/2

y=7/2

Divide is another option.

7/2=3.5

[tex]\Longrightarrow: \boxed{\sf{y=\dfrac{7}{2}}}[/tex]

Therefore, the correct answer is y=7/2.

I hope this helps. Let me know if you have any questions.

Dale wants to order business cards for his new job.

• Company A charges a flat fee of $0.15 per card.

• Company B charges $0.10 per card plus an additional $10.00 for delivery

Write an inequality for the amount of business cards, c, that Dale would need to buy for Company to be cheaper

Answers

Dale would need to buy more than 200 cards for Company B to be cheaper.

What is inequality?

Inequality is defined as the relation which makes a non-equal comparison between two given functions.

Company A charges a flat fee of $0.15 per card.

Company B charges $0.10 per card plus an additional $10.00 for delivery

Let x = number of cards

Company A charges = $0.15x

Company B charges = $10.00 + $0.10x

For company B to be the cheaper option ( B < A )

$10.00 + $0.10x < $0.15x

$10.00 < $0.05x

subtracting positive from both sides to retains the sense of the inequality and x is positive

200 < x

x > 200

So, Dale would need to buy more than 200 cards for Company B to be cheaper.

Learn more about inequality ;

https://brainly.com/question/10867023

#SPJ1

A bag contains 3red, 4white, 5green balls. Three balls are selected without replacement. Find the probability that the three balls chosen are:
A) all red
B) all green
C)one of each color

Answers

Answer:

A. 1/220 B. 1/22 C. 3/11

Step-by-step explanation:

This question uses combinations -- counting the number of ways a selection can be made from a set of objects (without arranging them after the selection is done).

Notations for combinations:

The number of ways to select r things from a set of n things is

[tex]C(n,r)=\frac{n!}{r!(n-r)!}[/tex] where the exclamation points mean factorial.

[tex]n!=1\cdot2\cdot3\ldots\cdot n[/tex] and 0! is defined to be 1.

There are two other commonly used symbols for this:

[tex]_nC_r[/tex] and [tex]n \choose x[/tex].

In all three parts, the number of ways to choose 3 balls from a set of 12 is

[tex]C(12,3) = \frac{12!}{3!(12-3)!}=\frac{12\cdot 11 \cdot 10 \cdot 9\cdot 8\cdot 7\cdot 6\cdot 5\cdot4\cdot3\cdot2\cdot1}{(3\cdot2\cdot1)(9\cdot8\cdot7\cdot6\cdot5\cdot4\cdot3\cdot2\cdot1)}[/tex]

Notice that 9 factors in the denominator cancel 9 factors in the numerator, leaving

[tex]C(12,3) = \frac{12!}{3!(12-3)!}=\frac{12\cdot 11 \cdot 10}{3\cdot2\cdot1}=220[/tex]

A. The number of ways to choose 3 red balls from the 3 red balls is C(3, 3) = 1, so the probability is 1 / 220.

B) The number of ways to choose 3 green balls from the set of 5 green balls is [tex]C(5,3)=\frac{5!}{3!(5-3)!}=\frac{5!}{3!2!}=\frac{5\cdot 4}{2}=10[/tex] out of 220, so the probability is 10/220 = 1/22.

C) The number of ways to choose 1 red is C(3, 1) = 3. Choose 1 green in C(5, 1) = 5 ways. Choose 1 white in C(4, 1) = 4 ways.

The probability is [tex]\frac{3\cdot 5 \cdot 4}{220}=\frac{60}{220}=\frac{3}{11}[/tex]

Answer:

a) 1/220

b) 1/22

c) 3/11

Step-by-step explanation:

Check the attachment.

Twenty-one less than a number is seven. What is the number? 3 14 28 147

Answers

Answer:

Option C, 28

Step-by-step explanation:

Step 1: Make an expression

Twenty-one less than a number is 7

[tex]x - 21 = 7[/tex]

Step 2: Solve the equation for x

[tex]x - 21 = 7[/tex]

[tex]x - 21 + 21 = 7 + 21[/tex]

[tex]x = 28[/tex]

Answer: Option C, 28

Answer:

Step-by-step explanation:

because twenty eight subtracted by twenty one equals seven

Kate packs snow into 5 identical jars. each jar represents a different depth of snow. kate then lets the snow in each jar completely melt. the table shows the height of the liquid in each jar as it relates to the original depth of snow in the jar. a 2-column table with 5 rows. the first column is labeled snow depth (inches), x with entries 2, 4, 6, 8, 10. the second column is labeled water depth (inches), f(x) with entries 0.4, 0.8, 1.2, 1.6, 2.0. which statements are true about the relationship between the depth of the snow and the height of water in the jar after the snow is melted? select two options. the points on a graph representing the relationship lie on a line. there is 0.4 inch of water to every 1 inch of snow. a line through the points will pass through (0, 0). the function relating snow depth to water depth is quadratic. the data can be represented by f(x) = 0.2x.

Answers

The true statements include the point on the graph represents the relationship lie on a line and a line through the points will pass through (0, 0).

How to illustrate the table?

From the table, the water depth changes for about (0.8 - 0.4) = 0.4 inches. Here, the function is a linear model.

In this case, the the point on the graph represents the relationship lie on a line and a line through the points will pass through (0, 0).

Learn more about graphs on:

https://brainly.com/question/19040584

Answer:

A & C

Step-by-step explanation:

hope this helps

What is the area for 12ft and 8.5 for a parallelogram

Answers

Answer:

102 ft^2

Step-by-step explanation:

Im pretty sure area for a parallelogram is the same as a rectangle, so A = bh which would be 12 x 8.5

what are the mean,median,mode, and range of the data set given the altitude of lakes in feet:-11,-28,-17,-25,-28,-39,-6,and -46? i dont know the answer

Answers

Answer:

Read explanation.

Step-by-step explanation:

The average is -22.2 (mean)

-46,-39,-28,-28,-25,-17,-11.-6 You cross out the lowest and highest until you reach the middle, which is -26.5(median)

The mode is -28 as it is the most repeated number

The range is 40 as when you subtract a negative it turns into the absolute value.

Answer:

My answers were (1,1) for both lmk if it works ;)

Step-by-step explanation:

1 A triangle ABC ,AB = 7.8 cm,AC= 7 cm an
Isosceles Triangle
Scalene triangle
Equilateral triangle
Right angled Triangle

Answers

Answer:scalene

Step-by-step explanation:none of the sides are equal length

A train travels from Washington D.C. to New York (225 miles). The train departs at 4:55 PM and arrives in New York at 7:55 PM. What is the average speed of the train?

Answers

7:55 pm - 4:55 pm = 3 hours

225 miles / 3 hours = 75 miles per hour

Average speed = 75 miles per hour

A composite figure is formed by combining a square and a triangle. Its total area is 49.5 ft. The area of the
triangle is 33.5 ft. What is the length of each side of the square? Complete the explanation.
The area of the square is
it?, so each side of the square is
ft.

Answers

Answer:

The length of each side of square is 5ft.

Step-by-step explanation:

A composite figure is formed by combining a square and a triangle. Its total area is 32.5ft squared.

The area of the triangle is 7.5ft squared.Area of combined figure - area of triangle = area of square.

32.5 ft squared - 7.5 ft squared = 25 ft squared.

So, area of square = 25 ft squared.

Now, by putting the formula for getting the length of each side:

Let the side = a.

Area of square = 25 ft squared

Area of square = a²

Using square root both sides we get:

So, the side = 5 ft.

Therefore, the length of each side of square is 5ft.

Find the least common denominator of 11/10 and 1/15

Answers

Answer is 30 is the least common denominator and 330 is the greatest common denominator

Answer: The least common denominator is 30.

Step-by-step explanation: Look at the image I have uploaded.

Good luck!

How do you solve this? In volume...

Answers

The answer is 30. Have a good day!

PLS HELPP WHAT IS THE ANSWER???

Answers

Answer:

-220

Step-by-step explanation:

Answer:

Let us start by plugging in x=2 into all variables x and y=1 into all y's

so: The result is -220

PLEASE HELP

i have no clue what im doing wrong but i cannot find the answer

Answers

2pi/b but there isn’t any b it would just be 2pi/1 making it only 2pi

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