Direct variation or not a direct variation

y=5/x

Answer:

$4,500

Step-by-step explanation:

4,200e^3(.023)

Answer:

Equation: 3x + 2 = 50

# of friends: 16

Step-by-step explanation:

3 chocolates each or 3x because what "each" means is not known yet-

3x

Note: Always use x for an unknown value

2 remaining chocolates-

3x + 2

50 total chocolates-

3x + 2 = 50

Remove two to keep the x alone-

3x = 48

Remove the 3 or the "Coefficient" by dividing-

48/3 = 16

x = 16

Equation: 3x + 2 = 50

# of friends: 16

Step-by-step explanation:

A line and a quadratic (parabola) can have either 0, 1, or 2 solutions.

It is impossible for a linear-quadratic system to have more than 2 solutions.

Answer:

x=36/11

Step-by-step explanation:

4(2x-1)=-3x+32

8x-4=-3x+32

8x-(-3x)-4=32

8x+3x-4=32

11x-4=32

11x=32+4

11x=36

x=36/11

Answer:

A. (2 × 6) + (3 × 8) + 6²

72 sq. inches.

B. 9 in. by 8 in.

Step-by-step explanation:

The white shape has dimensions of 2 in. by 6 in. and the green shape is a square.

So, the dimension of the green shape is 6 in. by 6 in.

Therefore, the length of the blue shape is (6 + 2) = 8 in.

Now, given that the area of the blue shape is 24 sq. in.

So, the width of the blue shape is [tex]\frac{24}{8} = 3[/tex] in.

Now, if we consider the total figure, then area of the entire figure = area of the  white shape + area of the green shape + area of the blue shape.

= (2 × 6) + (3 × 8) + 6² (Answer)

= 12 + 24 + 36  

= 72 sq, inches. (Answer)

Now, the length of the entire figure is (6 + 3) = 9 in. and width of the entire figure is (2 + 6) = 8 in.

Therefore, the dimensions of the entire figure will be 9 in. by 8 in. (Answer)

Answer:

Ariel

Step-by-step explanation:

Ariel is diving which is below the surface of the water

Answer:

ariel

Step-by-step explanation:

Answer:

[tex]\theta=54.25\°[/tex]

Step-by-step explanation:

we know that

When the sine of angle X is equal to the cosine of angle Y, then angle X and angle Y are complementary angles

so

[tex]X+Y=90\°[/tex]----> equation A

In this problem

[tex]X=\theta[/tex]

[tex]Y=(\theta-18.5)[/tex]

substitute in the equation A

[tex]\theta\°+(\theta-18.5)\°=90\°[/tex]

[tex]2\theta=90+18.5[/tex]

[tex]2\theta=108.5[/tex]

[tex]\theta=54.25\°[/tex]

Answer:

IT IS ETHER A OR B BROBABLY

Step-by-step explanation:

Answer:

Look the square root up on the internet.

Step-by-step explanation:

To find 1/2% as a decimal we can divide this by 100. (This is shown in the question)

1/2 = 0.5

0.5 / 100 = 0.005 (0.5% divided by 100 = 0.005)

_______

Best Regards,

Wolfyy :)

Answer:

Cut it in half so that the two pieces are each 7 in by 4 in.

Answer:

a(1) = 8, a(n + 1) = a(n) + 5

Checking this:

a(2) = a(1) + 5 = 8 + 5 = 13

a(3) = a(2) + 5 = 13 + 5 = 18

a(4) = a(3) + 5 = 18 + 5 = 23

a(5) = a(4) + 5 = 23 + 5 = 28

Answer:

C

Step-by-step explanation:

d/dx cos^2(5x^3)

= d/dx [cos(5x^3)]^2

= 2[cos(5x^3)]

= - 2[cos(5x^3)] * sin(5x^3)

= - 2[cos(5x^3)] * sin(5x^3) * 15x^2

= - 30[cos(5x^3)] * sin(5x^3) * x^2

Explanation:

d/dx x^n = nx^(n - 1)

d/dx cos x = - sin x

Chain rule:

d/dx f(g(...w(x))) = f’(g(...w(x))) * g’(...w(x)) * ... * w’(x)

Step-by-step explanation:

f(x) = cos²(5x³)

f(x) = (cos(5x³))²

Use chain rule to find the derivative:

f'(x) = 2 cos(5x³) × -sin(5x³) × 15x²

f'(x) = -30x² sin(5x³) cos(5x³)

If desired, use double angle formula to simplify:

f'(x) = -15x² sin(10x³)

z = 37°

Step-by-step explanation:

The exterior angle theorem says that the sum of two internal angles is equal to the exterior angle

In this case the sum of z and z+4 will be equal to z+41

Writing mathematically

[tex]z + z+ 4 = z + 41\\2z+4 = z + 41\\2z -z = 41 -4\\z = 37[/tex]

Hence

z = 37°

Keywords: Angles, Triangles

Learn more about angles at:

#LearnwithBrainly

[tex]7\frac{13}{21}[/tex] km thread will be needed for 8 boxes of shirts

Step-by-step explanation:

The proportion will be used to find the measurement of thread

Given

It takes 3 1/3 kilometers of thread to make 3 1/2 boxes of shirts.

Now,

As there are more boxes, more thread will be needed. So it is a direct proportion

So,

[tex]Km:box::Km:box\\3\frac{1}{3}: 3\frac{1}{2}::x:8\\\frac{10}{3}:\frac{7}{2}::x:8\\\frac{\frac{10}{3}}{\frac{7}{2}} = \frac{x}{8}\\\frac{10}{3} * \frac{2}{7} = \frac{x}{8}\\\frac{20}{21} = \frac{x}{8}\\x = \frac{20}{21} * 8\\x = \frac{160}{21}\\x = 7\frac{13}{21}[/tex]

Hence,

[tex]7\frac{13}{21}[/tex] km thread will be needed for 8 boxes of shirts

Keywords: Unit rate, conversion

Learn more about conversion at:

#LearnwithBrainly

Answer: 71 hours

Step-by-step explanation:

Answer:

[tex]y = \frac{1}{3}x + 3[/tex]

Step-by-step explanation:

The slope of two parallel straight lines are the same.

Now, the slope of the line [tex]y = \frac{1}{2} x + 8[/tex] is [tex]\frac{1}{2}[/tex] as the straight line equation is in slope-intercept form.

Now, the equation of the straight line in slope-intercept form which is parallel to the above line is [tex]y = \frac{1}{2} x + c[/tex] ............. (1) , where c is any constant.

Now, point (-2,2) is on the line (1) {Given}

So, this point will satisfy the equation.

Hence, [tex]2 = \frac{1}{2} (- 2) + c[/tex]

⇒ c = 3.

Therefore, the equation of the required straight line is [tex]y = \frac{1}{3}x + 3[/tex] (Answer)

Answer:

-20/21

Step-by-step explanation:

Answer:

b=43/3

Step-by-step explanation:

2/3+5=20-b

2/3+15/3=20-b

17/3=20-b

b=20-17/3

b=60/3-17/3

b=43/3

Explanation:

The formula for law of cosines is:

[tex]a^{2} = b^{2} + c^{2} - 2bc(cosA)[/tex]

This is written at the top of your paper.

The angle is substituted where the capital A is. The side opposite to the angle is the angle name's lowercase. The two other sides are b and c.

Substitute all the information you know, then isolate the variable that you do not know.

When your formula is rearranged to look like this:

[tex]\frac{a^{2} - b^{2} - c^{2}}{- 2bc} = (cosA)[/tex]

Solve the left side and punch into your calculator:

cos⁻¹(left side) to find the angle A.

Given:

LM = LN, KM = KN, KO bisects angle MKN

What we want to prove:

LO bisects angle MLN

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

Proof:

Statement 1: KM = KN

Reason 1: Given

---------------------

Statement 2: KO bisects angle MKN

Reason 2: Given

---------------------

Statement 3: Angle MKO = Angle NKO

Reason: Definition of angle bisection

---------------------

Statement 4: KO = KO

Reason 4: Reflexive property of congruence

---------------------

Statement 5: Triangle MKO = Triangle NKO

Reason 5: SAS postulate

note: this combines statements 1, 3, and 4 (for the "S", "A", and "S" in that order)

---------------------

Statement 6: MO = ON

Reason 6: CPCTC

note: CPCTC stands for "corresponding parts of congruent triangles are congruent"

---------------------

Statement 7: Angle KOM = Angle KON

Reason: CPCTC

---------------------

Statement 8: OL = OL

Reason 8: Reflexive property of congruence

---------------------

Statement 9: Triangle MOL = Triangle NOL

Reason 9: SAS postulate

note: used statements 6, 7, 8 for the "S", "A", "S" in that order

---------------------

Statement 10: Angle MLO = Angle NLO

Reason 10: CPCTC

---------------------

Statement 11: LO bisects angle MLN

Reason 11: Definition of angle bisection

---------------------

That concludes the proof. We did not use the statement "LM = LN", so it is unnecessary.

To prove that LO bisects angle MLN, we can use the Angle Bisector Theorem. According to this theorem, if a line bisects an angle, it divides the opposite side into two segments that are proportional to the adjacent sides of the angle. We can prove this by using the given information and applying the theorem.

To prove that LO bisects angle MLN, we can use the Angle Bisector Theorem. According to this theorem, if a line bisects an angle, it divides the opposite side into two segments that are proportional to the adjacent sides of the angle. In this case, LO is the angle bisector of angle MLN if and only if (MN/NO) = (ML/LO). We can prove this by using the given information and applying the theorem.

Given:

To prove:

Proof:

So, we have proven that LO bisects angle MLN.

The given statement that is unnecessary for this proof is 'TLX TL' because it does not provide any additional information or requirement for proving that LO bisects angle MLN.

Answer:

the answer is A

Step-by-step explanation:

1.35 divided by 3 = 0.45

0.45 multiplyed by 8 = $3.60

Answer:

Step-by-step explanation:

It's perfectly logical that as the number of hours spent watching TV increases, the grades received on the quizzes drop.  There's a negative correlation between the two variables.

Answer:

Prime number

Step-by-step explanation:

41 is a prime number.

How to test:

Divide 41 by every whole number from 1 until about it's square root.

√41 is about 6.4, round up to 7.

If any quotient is not a decimal number, 41 is not prime.

41/2 = 20.5

41/3 = 13.7

41/4 = 10.25

41/5 = 8.2

41/6 = 6.8

41/7 = 5.9

These are all decimal numbers.

Step-by-step explanation:

The answer would be A

Answer:

The least number of days that will pass before Andy will have to do both chores together on the same days are 5 days.

Step-by-step explanation:

Let us start from the initial day.

Every 2 days Andy takes out the trash.

So, the days he takes out trash are second day, fourth day, sixth day , eighth day , tenth day and so on..          (1)

Every 3 days Andy sweeps the kitchen.

So, the days he sweeps the kitchen are third day,  sixth day , ninth day , twelfth day and so on..          (2)

Now, on comparing both equations (1) and (2) we see the first common day to both the chores is SIXTH DAY.

Hence, the least number of days that will pass before Andy will have to do both chores together on the same days are 5 days.

Answer:

Elga's age is 5.

Step-by-step explanation:

3x=y

x+y=20

-------------

x+3x=20

4x=20

x=20/4

x=5

3(5)=15

y=15

x=5, y=15

Answer:

The correct answer is 149.00.

Step-by-step explanation:

Part = Percent • Whole

Adding a 65% markup to the original price of 105 is simply multiplying the price by the decimal form of the markup, then adding that to the original price. Next, you would find 20% of your sum by multiplying the sum by 0.20. Then you would find 7.5% of that and add this to the price.

Solve:

105 • 0.65 = 68.25                      Find 65% of 105

105 + 68.25 = 173.25                  Add the markup to the price

173.25 • 0.20 = 34.65                 Find the discount of the new price

173.25 - 34.65 = 138.60              Subtract discount from price

138.60 • 0.075 = 10.395             Find sales tax of new price (Or round to 10.40)

138.60 + 10.395 = 148.995         Add sales tax to new price (Or 149)

Because money only goes to the hundredths place, we can either start rounding to that place in the second to last step - rounding 10.395 to 10.40 - or we can round our answer - 148.995 rounds to 149. Either way, we will still get an answer of $149.00.

Hope this helps.

♥A.W.E.S.W.A.N.♥

Answer:

B $149.00

Step-by-step explanation:

105 * 1.65 =   173.25      (100%+ 65%)    Price with the markup            

173.25 *0.80  138.60  (Price after 20% discount .The price will be the 80%)    

 138.60 * 1.075 =   148.995  (price with 7.5  sales tax.)