30% of what number is 270,000?

Answer:

[tex] x = 6 \\ y = 9[/tex]

Step-by-step explanation:

[tex]2x - y - (x - y) = 3 - ( - 3) \\ 2x - y - x + y = 6 \\ x = 6[/tex]

[tex]2x - y = 3 \\ 2 \times 6 - y = 3 \\ 12 - y = 3 \\ - y = 3 - 12 \\ - y = - 9 \\ y = 9[/tex]

[tex] x - y = - 3 \\ 6 - 9 = - 3 \\ - 3 = - 3[/tex]

hope this helps you,! have a nice day!!

The system of equations is solved by substituting the expression for y from the linear equation into the quadratic equation, factoring the resulting quadratic, and solving for the two values of x, which are then used to find the corresponding y values, yielding solutions (3, 6) and (-2, 1).

To solve the system of equations given by

x2 - y = 3

x - y = -3

we observe that the second equation can immediately give us a value for y in terms of x. We can add 3 to both sides to isolate y:

y = x + 3

Next, we can substitute this expression for y into the first equation:

x2 - (x + 3) = 3

This simplifies to: x2 - x - 6 = 0

We can then solve this quadratic equation for x. A possible method is factoring, which, if the quadratic factors neatly, is often quicker than using the quadratic formula. The factored form is:

(x - 3)(x + 2) = 0

Setting each factor equal to zero gives us two solutions for x:

x = 3 or x = -2

Substituting these back into the equation y = x + 3 gives us the corresponding y values:

For x = 3: y = 3 + 3 = 6

For x = -2: y = -2 + 3 = 1

Thus, we have two solutions for the system: (3, 6) and (-2, 1).

Answer:

if a 5 liter jug is 7.5 kg, The 2 liter jug weighs 3 kg

Step-by-step explanation:

7.5 / 5  = 1.5

1.5 x 2 = 3

Answer:

3kg

Step-by-step explanation:

w/2 = 7.5/5

w = 7.5/5 * 2

w = 15/5

w = 3

Answer:

1.  y = -3/2 x +11

2.  y = -2 x -7

Step-by-step explanation:

Slope intercept form is y = mx+b

1. A (8, –1) and B (–4, 17)

First we need to find the slope

m = (y2-y1)/(x2-x1)

m = (17--1)/(-4-8)

   =(17+1)/(-4-8)

   =18/-12

Dividing top and bottom by 6

  =-3/2

Given the slope

y = -3/2 x+b

Using the point (8,1) we can find b

-1 = -3/2(8) +b

-1 =-12 +b

Add 12 to each side

-1+12 = -12+12 +b

11 =b

The equation is y = -3/2 x +11

2. C (–19, 31) and D (1, –9)

First we need to find the slope

m = (y2-y1)/(x2-x1)

m = (-9-31)/(1--19)

   =(-40)/(1+19)

   = -40/20

   =-2

Given the slope

y = -2 x+b

Using the point (1,-9) we can find b

-9 = -2(1) +b

-9 =-2 +b

Add 2 to each side

-9+2 = -2+2 +b

-7 =b

The equation is y = -2 x -7

Answer:

$33 for each grandchild.

Step-by-step explanation:

If Cher has $330 to give to 10 grandkids equally you have to devide.

So you would do $330 divided by 10 (number of grandchildren), which equals $33. So each child gets $33.

Answer:

It is the transitive property of equality

Answer: Transitive Property of Equality

Step-by-step explanation: The transitive property of equality states that if a = b and b = c, then a = c.

For example, if we're given the segment shown in the image provided and we know that the length of segment WX = XY and the length of segment XY = YZ, then based on the transitive property, he length of segment WX = YZ.

Answer:

Mary's score on the fifth test was 79.

Step-by-step explanation:

Let's solve for x, this way:

Mary's average score for the five tests = (Mary's 1st score + Mary's 2nd score + Mary's 3rd score + Mary's 4th score + Mary's 5th score)/5

Replacing with the values given:

81 = (88 + 91 + 75 + 72 + x)/5

81 * 5 = 326 + x

405 = 326 + x

- x = 326 - 405

x = 79

Answer:

-37

Step-by-step explanation:

Slope = y2 - y1/x2 - x1

Given

x1 = -99

y1 = -25

x2 = -98

y2 = -62

Therefore

Slope = -62 -(-25) /-98 -(-99)

Negative negative becomes positive

= -62 + 25 /-98 + 99

= -37/1

= -37

Answer:

23 groups :)

Step-by-step explanation:

Answer:

23

Step-by-step explanation:

Ok so heres the deal: You want to somehow take all 414 of those delicious pretzels and put them into x groups of 18. To do that you would divide 414 by the number of groups (x).

414/x=18

To solve this you just have to get x by itself.

So, multiply both sides by x.

414=18x.

Now divide by 18

414/18=x

23=x

Answer:

1,782 CM

Step-by-step explanation:

Answer:

Carpenters can install about 123 hinges.

Step-by-step explanation:

Since each hinge requires 3 screws. Divide 371 by 3.

= 123.666667

Answer:

123

Step-by-step explanation:

   [tex]\lim_{n \to \infty} a_n \pi \beta[/tex][tex]\left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \alpha \leq x^{2} \sqrt{x} x^{2}[/tex]that's how I got it

[tex]\lim_{n \to \neq \geq \leq x^{2} x^{2}[/tex]

Answer:

I think that the answer is option A

Answer:

a

Step-by-step explanation:

Answer:

Step-by-step explanation:

1 day -------------- $12

cost = 2(1 day) + 10

2 days ------------ $14

cost = 2(2 days) +10

3 days -------------$16

cost = 2(3)+10

and so on

Answer:

u just take the sum of all numbers divide by the number of numbers (5)

Answer: nonenot congruent

Step-by-step explanation:

Answer:

sin(x)=1/[tex]\sqrt10[/tex]

Step-by-step explanation:

The trigonometric identities involve trigonometric functions. Here we will be using Trigonometric identity

sin²x  = 1 /( 1+cot²x )

now cot(x)= -3

⇒ cot²x= (-3)²

⇒ cot²x= 9

sin²x= 1/( 1+9)

⇒ sin²x = 1/10

taking under root on both the sides we get

√sin²x=[tex]\sqrt1[/tex]/[tex]\sqrt10[/tex]

⇒ sin(x)=± 1/[tex]\sqrt10[/tex]

Answer:

Draw a model ⇒ See the attached figure

Tennis balls to tennis rackets ⇒ 5 : 3

Tennis balls to total pieces of tennis equipment​ ⇒ 5 : 8

Step-by-step explanation:

Let the number of tennis balls ⇒ x

Let the number of tennis rackets ⇒ y

The general form represents the situation is ⇒ y = mx

Where m is the slope

Given: For every 5 tennis balls in the bin, there are 3 tennis rackets.

So, when x = 5 ⇒ y = 3

So, 3 = m * 5⇒ m = 3/5 = 0.6

∴ y = 0.6 x

See the attached figure which represents a model to show the ratio of tennis balls to tennis rackets.

Tennis balls to tennis rackets = 5 to 3 or  5 : 3

Total pieces of tennis equipment​ = 5 + 3 = 8

Tennis balls to total pieces of tennis equipment​ = 5 to 8 or 5 : 8

Answer:

1 and 6

2 and 5

3 and 8

4 and 7

Step-by-step explanation:

vertical angles: each of the pairs of opposite angles made by two intersecting lines.

Answer:

7/20

Step-by-step explanation:

The probability is 7/20.

Probability is a branch of mathematics that deals with the occurrence of a random event.

The hazard that a given event will arise. The ratio of the variety of results in an exhaustive set of similarly probable results that produce a given occasion to the overall number of feasible results.

possibility = the number of methods of reaching achievement. the total number of possible outcomes.

explanation:

Tails up represents white ducks

and heads up represents black ducks

probability of two white ducks number tails from the table = 7

total sample = 20

Hence probability = 7/20

The possibility is the branch of mathematics regarding the incidence of a random event, and four major styles of opportunity exist: classical, empirical, subjective, and axiomatic. the possibility is synonymous with possibility, so you should say it is the possibility that a particular event will show up.

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Answer:

25

Step-by-step explanation:

When the equations intercect, the y-value is 25. (2,25)

Answer:

25

Step-by-step explanation:

Answer:

Step-by-step explanation:

√14 cannot be rewritten as the ratio of two integers and thus is irrational.

Similarly, √99 is irrational; √99 = √9√11 is irrational even though √9 is not.

Answer:

u < 4

Step-by-step explanation:

Step 1:  Subtract 8 from both sides

8 - u - 8 > 4 - 8

-u > -4

Step 2:  Divide both sides by -1

-u / -1 > -4 / -1

Since you divide by a negative, you flip the sign.

u < 4

Answer:  u < 4

Answer:

The answer would be x=7.3 cm

Step-by-step explanation:

Since you are using the angle of 20 degrees and you have the measure of 10 cm for its adjacent side, solving for x would mean you would use tan.

20=x/10

10*20tan=x

200tan=x

7.279404......=x

But when you do 200 tan on the calculator, you have to make sure you press the equal sign after.

At the denominator you have

(x-5)×4=4x-20.

But:

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

Answer:

see explanation

Step-by-step explanation:

Given

[tex]\frac{2(x+3)(x+4)}{(x+1)(x-5)}[/tex] × [tex]\frac{(x+1)}{4(x+3)}[/tex]

Cancel the common factors (x + 1), (x+3) on the numerator/ denominator

and cancel 2 and 4 on the numerator/ denominator by 2

= [tex]\frac{x+4}{2(x-5)}[/tex]

Answer:

x=5, 8, 9

Step-by-step explanation:

in a function, one x value must be paired with one and only one y value, this means there cannot be two points where x values are the same, however the y values can repeat.

if x = 5, 8, or 9, the relation is not a function because there are 2 same x values.

Answer: 3.2

Step-by-step explanation:

There are three whole, and 2 last.

Answer:3.667

Well, you divide 11 and 3 and round it.

Answer:

rational

Step-by-step explanation:

hope this helps!

Answer:

10.78moles

Step-by-step explanation:

Avogadro's hypothesis gives us a background understanding that 1mole of any substance contains 6.02x10^23 atoms.

Now, If 1 mole of K3PO4 contains 6.02x10^23 atoms,

Then Xmol of K3PO4 will contain = 6.49x10^24 atoms i.e

Xmol of K3PO4 = 6.49x10^24/6.02x10^23 = 10.78moles

To find the number of moles of K3PO4 in 6.49 x 10^24 formula units, divide the number of formula units by Avogadro's number, resulting in 10.78 moles of K3PO4.

To calculate the number of moles of K3PO4 in 6.49 x 1024 formula units, we use Avogadro's number, which is 6.022 x 1023 formula units per mole. This is the key conversion factor for converting between the number of formula units and the number of moles.

First, we have the given number of formula units of K3PO4:

To convert this to moles, we divide by Avogadro's number:

Number of moles = (6.49 x 1024 formula units) / (6.022 x 1023 formula units/mole)

= 10.78 moles of K3PO4

This calculation shows that there are 10.78 moles of K3PO4 in 6.49 x 1024 formula units of K3PO4.

The given sum is based on the concept of percentage.0.54 is 2.25[tex]\%[/tex] out of 24.

Percentage is a way of expressing a fraction or proportion out of 100. It is represented by the symbol "%". The word "percent" comes from the Latin phrase "per centum", which means "per hundred."

Percentages are commonly used to describe ratios, rates, or proportions in various fields such as mathematics, finance, statistics, and everyday life. They allow us to compare quantities or express relative changes easily.

To find 2.25[tex]\%[/tex] of 24, multiply 24 by 2.25[tex]\%[/tex] (or 0.0225):

2.25[tex]\%[/tex] [tex]\times[/tex] 24 = 0.0225 [tex]\times[/tex] 24

                   = 0.54.

Therefore, 2.25[tex]\%[/tex] of 24 is 0.54.

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Answer:

19 hours

Step-by-step explanation: he needs to work 19 hours because if you divide the sum of money(162$) he got from working 9 hrs you get that he makes 18$ per hour then divide that by the sum of money that he needs(342$)

Matt earns $18 per hour and needs to work a total of 19 hours to afford a $342 video game system.

Matt earned $162 this week by working 9 hours. This means that Matt earns $18 per hour (since 162 ÷ 9 = 18). To find out how many total hours Matt needs to work to buy a new video game system that costs $342, we divide the total cost of the video game system by his hourly wage. So, $342 ÷ $18 = 19 hours. Therefore, Matt needs to work a total of 19 hours to afford the video game system.

The greatest common factor (GCF) of the expression 12² + 6²³ − 9 is 3. So, factored form is c) 3xy (4x² + 2xy – 3y²).

To factor out the greatest common factor (GCF) from the expression

12² + 6²³ − 9, we need to identify the highest common factor among the terms.

First, let's list the factors of each term:

12² can be factored into 3 × 2 × 2 × × ×

6²³ can be factored into 3 × 2 × × × × ×

9 can be factored into 3 × 3 × ×

The highest common factor among these terms is 3.

Now, we divide each term by 3:

12² ÷ 3 = 4

6²³ ÷ 3 = 22

9 ÷ 3 = 3

So, the factored expression becomes 3 (4² + 2² −3). This is the result of factoring out the GCF 3 from the given expression.

Complete Question:

Factor the GCF: 12x2y + 6x2y3 – 9xy?

a) 3x²y (4x² + 2xy - 3)

b) 3xy (4x + 2xy - 3y²)

c) 3xy(4x² + 2xy – 3y²)

d) 3x²y(4x³y – 2x²y² - 3xy³)