Which of the following best describes the solution to the system of equations below?
3x + 5y = 9
3x + 5y = 15

The solution to the given equation is x = -7/9, after simplifying and solving for x.

To simplify the equation -4(x + 4x) = 2(2 - x) + 10, start by combining like terms within the parentheses: -4(5x) = 2(2 - x) + 10. This leads to -20x = 4 - 2x + 10. Further simplifying, you get -20x = 14 - 2x. Now, add 2x to both sides to eliminate the variable on the right, resulting in -18x = 14. To isolate x, divide both sides by -18, yielding x = -14/18, which can be further reduced to x = -7/9. In summary, the equation simplifies to x = -7/9 after a series of steps.

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Answer:

Step-by-step explanation:

2x+6

<3

Callie

Answer:

The equation that is solved by George is

=4 x - (x+2) +6

 =4 x -x -2 +6-------Using Distributive property of Multiplication with respect to Addition→ a×(b+c)=a×b+a×c

→Adding and subtracting like terms

=3 x+4

Answer: B. y = 1.560x - 4.105*****

Answer:

Option B.

Step-by-step explanation:

The general equation of best fit line is

[tex]y=mx+b[/tex]              .... (1)

where, m is slope and b is y-intercept.

[tex]m=\frac{\sum_{i=1}^nx_iy_i-n\overline{x}\overline{y}}{\sum_{i=1}^nx_i^2-n\overline{x}^2}[/tex]

[tex]b=\overline{y}-b\overline{x}[/tex]

Using the graphing calculator we get

[tex]m=1.56015\approx 1.560[/tex]

[tex]b=-4.10526\approx -4.105[/tex]

Substitute m=1.560 and b=-4.105 in equation (1).

[tex]y=1.560x-4.105[/tex]

The equation of the line of best fit for the following data y = 1.560x - 4.105.

Therefore, the correct option is B.

Answer:

C

Step-by-step explanation:

F must be on -4

H must be on 4 (because it is -f=-(-4)=-1•-4=4)

Answer:

Step-by-step explanation:

the answer is c

Answer:

Relation.

Step-by-step explanation:

This is a relation but not a function. The input -1 maps to both 0 and 2; this is a one-to-many relation  so it is not a function. Functions are either one-to-one or many-to-one.

Answer:

Relation cause its not a function

Step-by-step explanation:

This is a relation but not a function.

Answer:

Their sign changes.

For this case we have to:

Given two lines:

[tex]y_ {1} = m_ {1} x_ {1} + b_ {1}\\y_ {2} = m_ {2} x_ {2} + b_ {2}[/tex]

By definition, if both lines are perpendicular to each other, then the product of their slopes is -1. That is to say:

[tex]m_ {1} * m_ {2} = - 1[/tex]

ANswer:

The product of the slopes of two perpendicular lines is -1.

Answer:

2d + 8

Step-by-step explanation:

twice the number d = 2 × d = 2d and 8 more means add on 8, that is

2d + 8 ← is the variable expression

(d x 2) + 8

deconstruct it from the end of the sentence- twice the number 'd' and add 8

it is an increase of 400%

Final answer:

The percent increase in Minerva's bicycle price is calculated by subtracting the original price from the new price, dividing by the original price, and then multiplying by 100%. The calculation results in a 400% increase.

Explanation:

The percent increase in the price of the bicycle that Minerva bought and sold is calculated using the formula for percent change, which is (New Price - Original Price) / Original Price times 100%. In this case, the original price is $10 and the new price is $50.

To calculate the percent increase:
($50 - $10) / $10 times 100% = $40 / $10 times 100% = 4 times 100% = 400%.

Therefore, the correct answer is 400%, which is option A.

75 coins because you take 150/2 and get 75 coins

Answer:

-3x

Step-by-step explanation:

Combine like terms (terms with the same amount of variables). Note that + x = + 1x. First add, then subtract:

2x + x = 3x

3x - 6x = -3x

-3x is your answer.

~

Answer:

6x

Step-by-step explanation:

Answer:

24 outfits

Step-by-step explanation:

Since you have 4 choices of shirts, then 3 choices of shorts, and then 2 choices of shoes, the formula should be set up as 4 x 3 x 2. This gives you 24 outfit options.

Answer: The answer is C

Step-by-step explanation:

Answer:

Option C is correct.

Step-by-step explanation:

C. Buying a hammer and buying nails are dependent events. - This is correct.

Two events are said to be dependent on each other, if the occurrence of the first event affects the occurrence of the second event thus changing the probability. Here the probability for both the events is [tex]0.10\times0.40=0.04[/tex]

x = -4

Let the number = x (set up an equation)

2x = -3x - 20

add 3x to both sides

5x = -20

divide by 5 on both sides

x = -4

The question involves creating and solving an algebraic equation. By interpreting the word problem, we create the equation 2x = -3x - 20. Solving this equation, we find that the number in question is -4.

The subject matter here is algebra, which falls under Mathematics. From the question, we can create an algebraic equation to find the number. Since the product of the number and 2 is 20 less than the product of the number and -3, we can write this as 2x = -3x - 20, with 'x' representing the unknown number. Solving this equation for x, we add 3x to both sides, turning the equation into 5x = -20. Dividing both sides by 5, we find that x = -4. So, the number is -4.

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Answer:

The amount of time it takes for her to make 1 bracelet.

Step-by-step explanation:

You can set up an equation as 3k = 15, and then solve it by dividing by 3 on both sides, getting an answer of 5.

Answer:

Step-by-step explanation:

The proportionality constant of 5 minutes per bracelet means it takes Olivia 5 minutes to make 1 bracelet.

Answer:

f(x)⁻¹ = x³ + 2

Step-by-step explanation:

Find the inverse of f(x) = ∛(x - 2).

The first step is to let f(x) = y

y =  ∛(x - 2)

Then make x the subject of the formula

y³ =  [∛(x - 2)]³

y³ = x - 2

x = y³ + 2

∴ f(x)⁻¹ = y³ + 2

Replacing y with x we have.

f(x)⁻¹ = x³ + 2

Answer:

The following are each student's z-scores

Jordan = 2

Jake = -2.5

Jacob = 0

Step-by-step explanation:

To find each of these, use the formula given in the picture. The x value will be the student's height. The mu (or funny looking m) will be the mean. And the sigma (the o with a line) is the standard deviation.

Jordan

z = (x - m)/o

z = (53 - 49)/2

z = 4/2

z = 2

Jake

z = (x - m)/o

z = (44 - 49)/2

z = -5/2

z = -2.5

Jacob

z = (x - m)/o

z = (49 - 49)/2

z = 0/2

z = 0

Answer:

The following are each student's z-scores

Jordan = 2

jake = -2.5

Jacob = 0

What is the height of a student whose z-score is 3?

55"

Step-by-step explanation:

33÷6789 or 6789÷33? 33÷6789 would give you a decimal less than 1, 6789÷33 would give you a number greater than 1 possibly with a remainder.

Answer:

he spent $135

Step-by-step explanation:

He spent $135

1. 0.6(600)=360

2. 0.375(360)=135

To find out how much ribbon is left after using 1/2 yard from a piece that is 7/8 yard long, convert 1/2 yard to 4/8 and subtract from 7/8, leaving you with 3/8 yard of ribbon remaining.

To determine how much ribbon will remain after using 1/2 yard for a craft project from a piece that measures 7/8 yard, you need to subtract the amount used from the total length you have. Since we are working in yards, ensure both amounts are in the same units. Here are the steps to find the remaining ribbon:

Start with the total length of ribbon: 7/8 yard.

Subtract the length of ribbon used for the project: 1/2 yard.

Convert 1/2 yard to an equivalent fraction with a denominator of 8, which is 4/8 yard.

Subtract 4/8 yard from 7/8 yard to find the remaining length.

7/8 yard - 4/8 yard = 3/8 yard remaining.

So, after using 1/2 yard of ribbon for a craft project, you will have 3/8 yard of ribbon left from the original 7/8 yard piece.

Answer:c

Step-by-step explanation:

$9953.30

Answer:

[tex]106\°+x=180\°[/tex]

Step-by-step explanation:

Observing the figure

we know that

[tex]106\°+x=180\°[/tex] ----> by supplementary angles

Solve for x

[tex]x=180\°-106\°=74\°[/tex]

A = sinx - sin3x,  

B = -sin3x + sin5x  

First A:  

The average of x and 3x is 2x, and they (x and 3x, that is) are each a distance of x from this average. That's fancy talk for:  

x = 2x-x,  

3x = 2x+x.  

So, A = sin(2x-x) - sin(2x+x)  

Using angle sum formulas:  

A = (sin2x cosx - cos2x sinx) - (sin2x cosx + cos2x sinx)  

A = -2 cos2x sinx  

Similarly,  

B = -sin(4x-x) + sin(4x+x)  

= -(sin4x cosx - cos4x sinx) + (sin4x cosx + cos4x sinx)  

B = 2 cos4x sinx  

Now,  

sinx - 2sin3x + sin5x = A+B = -2 cos2x sinx + 2 cos4x sinx  

= 2 sinx (cos4x - cos2x).  

Sinx-2sin3x+sin5x=2sinx(cos4x-cos2x)  

sinx - 2sin3x + sin5x = sinx - sin(3x) + sin(5x)- sin(3x)

=  2· cos[(x+3x)/2] · sin[(x-3x)/2] + 2·cos[(5x+3x)/2]· sin[(5x-3x)/2]

= 2· cos(2x) ·sin(-x) + 2· cos(4x) · sin(x)

=  -2·cos(2x)·sinx + 2· cos(4x)·sinx

=  2·sinx · [ cos(4x)- cos(2x)]

Answer:

pyramid with square base.

Step-by-step explanation:

We have been given some description about a simple solid which looks like a square from above, a triangle from the front, and a triangle from the side.

Now we need to figure out which solid has above properties.

The answer will be pyramid with square base. Because side walls of pyramid are always in same shape.

Answer: False

Step-by-step explanation: Similar means the ability for two shapes to be congruent to each other if dilated.

Also, corresponding angles are angles that have the same length. This means that this statement is indeed False.

Answer:A-1/2h(b1+b2)

A-1/2*(10.1)*(30.5+21.4)

A-3296.135 i think

Step-by-step explanation:

To find the area of the unshaded portion of a figure containing a trapezoid and a rhombus, calculate the area of each figure first using their respective formulas. Subtract the area of the overlapping (shaded) region from the total to find the area of the unshaded portion.

The problem asks to find the area of the unshaded portion of a figure, which includes a trapezoid and a rhombus. Since we don't have the specific values of the sides and heights of each figure, a general approach would be to calculate the area of each figure first, then subtract the area of the shaded (overlapping) region from it.

The formula for the area of a trapezoid is A = 1/2 (a+b)h, where 'a' and 'b' are the lengths of the parallel sides and 'h' is the height. For the rhombus, the formula is A = 1/2 (d1 * d2), where 'd1' and 'd2' are the diagonals.

Assuming you can measure and determine the shaded region, you would compute its area as well and subtract this from the total of the previous two calculations. This would give you the area of the unshaded portion.

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➷ 236 + 542 = 778

778 + N = 863

Subtract 778 from both sides:

N = 85

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ ʜᴀɴɴᴀʜ ♡

Answer:

85

Step-by-step explanation:

(236+542)+N=863 add the parenthesis first which gives you 778 subtract 778 by 863 which gives you 85 therefore your answer is 85

Answer:

-5,120

Step-by-step explanation:

The pattern is increasing by x*2

I would say -100

You would find this out by identifying your 'a' which is the first number of the sequence, in this case it is -5

Then you would find the common ratio. You do that by dividing any two of the numbers after your 'a' For this one I chose to divide -20 by -10 and that gets you 2.

You would multiply those together, getting you -10.

So, from here you would put the term you are trying to find (in this case it is the 11th term) and subtract it by one

11-1=10

Lastly, you would multiply your -10 by 10 and get yourself a -100

Formula: nth term =  a1^n-1

Hope this helps :) Sorry if it is kinda confusing...

Answer:

2 gallons

Step-by-step explanation:

So say we make everything into cups. We know there is 4 cups in a quart and 2 cups in a pint. So if we do the math you are really adding

4 cups + 4 cups + 8 cups + 16 cups

So that  would be 32 cups.

We also know there is 16 cups in a gallon. Since we know that then we can do

32 cups ÷ 16 cups

That would be 2 gallons!

Hope this helps!

Final answer:

Jeff makes 2 gallons of fruit punch by converting all the liquid measurements to pints and then summing them up to convert to gallons.

Explanation:

To determine how many gallons of fruit punch Jeff makes, we need to convert all the measurements to the same unit and then add them together. Here are the conversions we'll use:

1 quart = 2 pints

1 pint = 2 cups

1 gallon = 4 quarts

1 gallon = 8 pints

1 gallon = 16 cups

Now let's convert everything to pints since most of the units provided are in pints:

Orange juice: 1 quart = 2 pints

Pineapple juice: 2 pints

Tropical punch: 8 cups = 4 pints

Ginger ale: 8 pints

Add all the pints together:

2 pints (orange juice) + 2 pints (pineapple juice) + 4 pints (tropical punch) + 8 pints (ginger ale) = 16 pints total

Now convert pints to gallons:

16 pints ÷ 8 pints/gallon = 2 gallons

So, Jeff makes 2 gallons of fruit punch.

Answer: 7.97 meters

Step-by-step explanation:

You must use the formula for calculate the area of a circle, which is:

[tex]A=r^2\pi[/tex]

Where r is the radius of the circle.

The diameter of the circle is:

[tex]D=2r[/tex]  

Solve for r from  [tex]D=2r[/tex]  

[tex]r=\frac{D}{2}[/tex]

Substitute the area and [tex]r=\frac{D}{2}[/tex] into the first equation and solve for the diameter. Then you obtain:

[tex]50m^2=(\frac{D}{2})^2\pi\\\\50m^2=\frac{D^2}{4}\pi\\\\D=\sqrt{\frac{4*50m^2}{\pi}}\\D=7.97m[/tex]

Answer:

The  diameter of a circle that has 50 square meters = 7.98 m

Step-by-step explanation:

Formula

Area of circle = πr²

Where 'r' is the radius of circle

Diameter of circle d = 2r

It is given that area of circle = 50 square meters

To find the radius of circle

we have,

Area of circle = πr² = 50

r² = 50/π = 50/3.14 = 15.924

r = √15.924 = 3.99

To find the diameter of circle

Diameter = 2r = 2 * 3.39 = 7.98 m