Which of these relations is a function?
Which number?

Answer:

sometimes

Step-by-step explanation:

the square root of 49 is 7, but the square root of two is 1.4142135623730951

Answer:

x=-3

Step-by-step explanation:

[tex]\sqrt{x+7}-x=5\\\sqrt{x+7}=5+x\\x+7=x^2+10x+25\\x^2+9x-18=0\\(x+3)(x+6)=0\\x=-3, x=-6\\\sqrt{-3+7}-(-3)=5\\\sqrt{-6+7}-(-6)=7=5[/tex]

x=-6 is extraneous because 7 does not equal to 5

x=-3 is the answer because 5=5

Answer:

There were 8 more silver coins than gold coins in the jar.

Step-by-step explanation:

Given that:

Total coins in the jar = 80 coins

Gold coins = 25% of total coins

Number of gold coins = [tex]\frac{25}{100}*80[/tex]

Number of gold coins = 20

Silver coins = 35% of total

Number of silver coins = [tex]\frac{35}{100}*80[/tex]

Number of silver coins = 28

Copper coins = 40% of total

Number of copper coins = [tex]\frac{40}{100}*80=32[/tex]

Difference between silver and gold coins = No. of silver coins - No. of gold coins

Difference = 28-20 = 8

Hence,

There were 8 more silver coins than gold coins in the jar.

Answer:

jjjhvgfxzeAWQ2

Step-by-step explanation:

JUGFHHHGFDFGHFDFGHG

Answer:

$162

Step-by-step explanation:

you divide 6 months by 2 then you divide 108 by 2 then you add the half of 108 and plus it to 108 then you get your total.

The function of the length of time you have been taking classes is f(x) = 15x and cost for 9 months is $135

A unit rate means a rate for one of something.

Given that, You are taking a TAE Kwan Do class that costs $15 a month. In addition, you needed to purchase a uniform. You paid a total of $108 after 6 months.

We have unit rate = $15 per month

Since, one month cost is $15 therefore, for 6 months = 15×6 = $90

Therefore, cost of uniform = $108 - $90 = $18

Let you are taking classes for x months, the function of the length of time you have been taking classes,

f(x) = 15x

For 9 month cost =

f(9) = 15×9 = 135

Hence, the function of the length of time you have been taking classes is f(x) = 15x and cost for 9 months is $135

Learn more about unit rates, click;

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Answer:

SAS

And I don’t know if your going to give me a cookie. We need to social distance you know ;)

Answer:

The standard form of this hyperbola is [tex]\frac{(x-3)^{2}}{5}-\frac{(y+1)^{2}}{9} = 1[/tex].

Step-by-step explanation:

From Analytical Geometry, the standard form of the hyperbola is defined by the following expression:

[tex]\frac{(x-h)^{2}}{a^{2}}-\frac{(y-k)^{2}}{b^{2}} = 1[/tex] (1)

Where:

[tex]x[/tex] - Independent variable, dimensionless.

[tex]y[/tex] - Dependent variable, dimensionless.

[tex]a, b[/tex] - Semiaxis lengths, dimensionless.

[tex]h, k[/tex] - Coordinates of the center, dimensionless.

Let the hyperbola be defined by [tex]9\cdot x^{2}-5\cdot y^{2}-54\cdot x -10\cdot y +31=0[/tex], we proceed to derive the standard form by algebraic means:

1)  [tex]9\cdot x^{2}-5\cdot y^{2}-54\cdot x -10\cdot y +31=0[/tex] Given

2) [tex](9\cdot x^{2}-54\cdot x)+(-1) \cdot (5\cdot y^{2}+10\cdot y)+31 = 0[/tex] Commutative and associative properties/[tex](-1)\cdot a = -a[/tex]

3) [tex](9\cdot x^{2}-54\cdot x + 81)+(-81)+(-1)\cdot (5\cdot y^{2}+10\cdot y +5)+(-1)\cdot (-5)+31 = 0[/tex] Modulative, distributive and associative properties/[tex](-1)\cdot a = -a[/tex]/Existence of the additive inverse

4) [tex](3\cdot x-9)^{2}+(-1)\cdot (\sqrt{5}\cdot y +\sqrt{5})^{2}+(-81)+5+31 = 0[/tex] Perfect trinomial square/[tex](-a)\cdot (-b) = a\cdot b[/tex]/Commutative property

5) [tex]9\cdot (x-3)^{2}+(-1)\cdot (5) \cdot (y+1)^{2}-45 = 0[/tex] Distributive property/[tex](a\cdot b)^{c} = a^{c}\cdot b^{c}[/tex]/Definition of addition and subtraction.

6) [tex]9\cdot (x-3)^{2}-5\cdot (y+1)^{2}= 45[/tex]    [tex](-1)\cdot a = -a[/tex]/Compatibility with addition/Existence of additive inverse/Modulative property.

7)  [tex]\frac{(x-3)^{2}}{5}-\frac{(y+1)^{2}}{9} = 1[/tex] Compatibility with multiplication/Definition of division/Distributive property/Result.

The standard form of this hyperbola is [tex]\frac{(x-3)^{2}}{5}-\frac{(y+1)^{2}}{9} = 1[/tex].

Answer: w=5 , L= 2+2(5)=12

Step-by-step explanation:

L=2+2W

A= 60

LxW=60, now we will replace the L

(2+2W)(W)=60   we multiply

2w^2+2w=60

2w^2+2w-60=0  we divide by 2 the equation so we can work easier

w^2+w-30=0

find out w using the quadratic equation

we will get 2 solution,

w=5 and another solution is -6, which is not valid, as the side can not be negative

Answer:

passive income

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

Answer:

X=5

Step-by-step explanation:

(step 1) 2 - 3x = -x - 8

-3x + 2 = -x -8

(step 2)

-3x + 2 = -x - 8

-3 + 2 - 2 = -x -8 -2

(step 3)

-3x =  -x- 10

(step 4)

-3 + x = -x -10 +x

(step 5)

-2x = -10

Answer

x = 5

Answer:

b

Step-by-step explanation:

Answer:

It would get MUCH hotter

Step-by-step explanation:

without water vapor to keep to plantet at an equilibrium it would get hotter which would boil the oceans making the earth more like venus

Answer:

3x³ - 8x² - 7x + 12

Step-by-step explanation:

We multiply these terms, (so expand the brackets). Referring to the diagram attached, we multiply the first terms, outer terms, inner terms, and last terms.

Let's first look at the first two (we will do something about the third brackets later):

(3x+4)(x-1)

Firsts:

3x²

Outer:

-3x

Inner:

4x

Last:

-4

Now we combine:

3x² - 3x + 4x - 4

= 3x² + x - 4

So from the whole equation, we now have this:

(3x² + x - 4)(x - 3)

We do a similar thing here.

3x³ - 9x² + x² - 3x - 4x + 12

Simplify:

3x³ - 8x² - 7x + 12

Answer:

18x-16

Step-by-step explanation:

expression: (11x-8)+7(x-1)

ok so what you want to do is combine like terms

but first you are going to distribute

(11x-8)+(7x-8) you distribute the 7

they you can subtract 8 from -8 and that will give you -16

you will then add 11x and 7x which will get you 18x

the final expression will be 18x-16

Answer:

Yes

Step-by-step explanation:

You can conclude there are 18 horses because although some of the mares might be brown horses, the conjunction "and" implies the mares are in addition to the brown horses.

40kg of dough

Step-by-step explanation:

24 kg dough...........................6 hours

? dough.........................10 hours

x=(24*10)/6=240/6=40

Answer:

2

Step-by-step explanation:

the scale factor is 2 because all the sides dubled

Answer:

right now if you were to have a coke depending on the weather is from where you are standing effect how long it will take to melt

Step-by-step explanation:

Answer:

The total cost of the ski hat and the ski boots is $112.35.

Step-by-step explanation:

First, we need to add the prices of the ski hat and the ski boots.

85.50 + 19.50 = $105

Now, we need to find 7% of $105, and then add it to the total.

105 x 0.07 = $7.35

105 + 7.35 = $112.35

Therefore, the total cost of the ski hat and the ski boots is $112.35.

Hope this helps! :D

Answer:

y = (-5/2)x + 1

Step-by-step explanation:

We can see that the line intersects (0,1) and (2, -4). We use these points to find the slope: m = (-4-1)/(2-0) = -5/2. Also, the y-intercept is (0,1), so b = 1. Substituting these values into y=mx +b, we get y = (-5/2)x + 1.

I hope this helps! :)

Answer:5 days

Step-by-step explanation:

16 divided by 4=4 postcards a day

20 divided by 4=5

5 days in total

hope this helps . Please mark brainliest

Answer:

Answer: B. XY

Step-by-step explanation:

Lines and Circles

There are four lines in the figure:

OB =Radius: A segment from the center to the circumference

XY = Secant: A line that intersects the circle in two points

EF = Chord: A line segment that joins two points on the circle

XV and XB = Tangent: A line that touches the circle on one point and is perpendicular to the radius.

Answer: B. XY

Answer: 5 kilometers

Step-by-step explanation: 6:2 = 3:1 = 15:5

Answer:

The answer would be (D) Zn(NO3)2 + Cu

Step-by-step explanation:

For everyone else who needs the answer

Answer:

D

Step-by-step explanation:

DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD:D

Answer:

An unary association

Step-by-step explanation:

Based on the information presented, it can be inferred that Mia made 8 baskets last Saturday.

To calculate the number of baskets Mia made last Saturday we must take into account the following information:

To calculate the number of baskets Mia made, we must divide 24 by 3 to find the number of baskets she made last Saturday.

So, it can be inferred that Mia made 8 baskets last Saturday.

Learn more about division in: https://brainly.com/question/369266

Answer:

f(3) = -35

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Step-by-step explanation:

Step 1: Define

f(x) = -7(x + 2)

f(3) is x = 3

Step 2: Evaluate

Answer:

1/-6

Step-by-step explanation:

tell me in the comments if there are more like this ill answer them