need help pleaseeeee

Answers:

Trey's number line is incorrect because it represents the expression 2 1/2 ÷ 3/4.

The correct equation is 2 1/2 ÷ 3/8 = 6 2/3.

Ms. Nellies has enough vinegar for 6 groups of students.

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Explanation:

Trey has the right idea, but made a mistake on how the tickmarks are set up. Focus on the interval from 0 to 1. This section is cut into 4 equal pieces. So each tickmark represents 1/4 of a unit.

Going 3 tickmarks across means 3/4 of a unit is represented. Since each larger arc represents 3/4 of a unit, this means we're dividing the 2 & 1/2 over 3/4 instead of 3/8

That's why Trey's model represents 2 1/2 ÷ 3/4

The value 3 & 1/3 at the end is correct. Visually we see 3 whole jumps plus an extra 1/3 of a jump to arrive at 2 & 1/2. But again, Trey didn't cut the number line up in the right way, so it doesn't matter that he arrived at the correct result of 3 & 1/3 since his initial setup is faulty.

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See the diagram below to see what Trey should have drawn. Notice each tickmark represents 1/8 instead of 1/4. Each large blue arc jump represents 3/8 of a unit. We have exactly 6 of these blue arcs plus 2 additional smaller arcs that are 1/3 of the blue arc. So that accounts for the 1/3+1/3 = 2/3 portion.

Overall, we would say that the equation is 2 1/2 ÷ 3/8 = 6 2/3

If you're curious why that equation works, check out the steps below

[tex]2 \frac{1}{2} \div \frac{3}{8} = \frac{5}{2} \div \frac{3}{8}\\\\2 \frac{1}{2} \div \frac{3}{8} = \frac{5}{2} \times \frac{8}{3}\\\\2 \frac{1}{2} \div \frac{3}{8} = \frac{5*8}{2*3}\\\\2 \frac{1}{2} \div \frac{3}{8} = \frac{40}{6}\\\\2 \frac{1}{2} \div \frac{3}{8} = \frac{20}{3}\\\\2 \frac{1}{2} \div \frac{3}{8} = \frac{18+2}{3}\\\\2 \frac{1}{2} \div \frac{3}{8} = \frac{18}{3}+\frac{2}{3}\\\\2 \frac{1}{2} \div \frac{3}{8} = 6+\frac{2}{3}\\\\2 \frac{1}{2} \div \frac{3}{8} = 6\frac{2}{3}\\\\[/tex]

So again, the equation is 2 1/2 ÷ 3/8 = 6 2/3

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What does this all mean? Well it means the teacher can break up the vinegar into 6 whole parts plus an additional 2/3 of a part.

In other words, 6 groups will get 3/8 of a pint each. The leftover part 2/3 isn't enough to form that 7th group. Notice in the diagram below, we have 2/8 = 1/4 of a pint which is smaller than 3/8 of a pint.

1/4 = 0.25

3/8 = 0.375

So this is another way to see that the leftovers isn't enough to form a 7th group.

Therefore, she has enough vinegar for 6 groups

9514 1404 393

Answer:

  no

Step-by-step explanation:

The measures 14, 18, 33 cannot correspond to the sides of a triangle. The two short sides total 32 in length, so cannot meet up with the ends of the side whose length is 33. A triangle cannot be formed.

Answer:

B, 11000

Step-by-step explanation:

assuming a 365 day year...

[tex]10500*(1+.15)^{\frac{123}{365}}= 11006.35813[/tex]

which I guess is close enough to 11000

The total repayment amount is $11030.75. Therefore, option C is the correct answer.

Given that, Principal $10,500.00 annual rate of interest 15%, time 123 days.

Simple interest is a method to calculate the amount of interest charged on a sum at a given rate and for a given period of time.

Simple interest is calculated with the following formula: S.I. = P × R × T, where P = Principal, R = Rate of Interest in % per annum, and T = Time, usually calculated as the number of years.

Now, simple interest = (10500 × 15 × 123)/(100 × 365)

= 193725/365

= 530.75

So, amount = 10,500.00+530.75

= 11030.75

The total repayment amount is $11030.75. Therefore, option C is the correct answer.

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Answer:

10x+8

Step-by-step explanation:

4( x + 2) + 6x

Distribute

4x+8 +6x

Combine like terms

10x+8

Answer:

10x+8

Step-by-step explanation:

4x+8+6x

(4x+6x)+8

10x+8

The probability that the first 3 parties are selected from the window seats is 0.0041

Probability is a measure of the likelihood of an event to occur. Many events cannot be predicted with total certainty.

Probability can range from 0 to 1, where 0 means the event to be an impossible one and 1 indicates a certain event. The probability of all the events in a sample space adds up to 1.

The probability that a party will be chosen from the window seat is 4/25

Therefore the probability of 3 chosen from the window seat is 4/25×4/25×4/25

= 64/15625= 0.0041

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Answer:

true

Step-by-step explanation:

The diameter of a circle is a single line segment that stretches the entire width of the circle, intersecting with the center point and two points around the circumference. The diameter measures how wide the circle is, and is always equal to twice the radius (2r).

Answer:

10 cm^2

Step-by-step explanation:

area= 1/2 b*h

1/2 (5) (4)

= 1/2 (20)

=10

area= 10cm^2

Answer:

a = 10cm²

Step-by-step explanation:

a = (1/2)bh

a = (1/2)(5)(4)

a = 10cm²

Answer:

f(-3)=-2,5

f(-1)=-1,5

f(3)=¾

Answer:

-5/2

3/2

3/4

Step-by-step explanation:

Step-by-step explanation:

Sub n in the equation

2^7-1 = 128-1=127

A square

Step-by-step explanation:

because there're only 2 circles being create whereas with an equilateral

Answer:

A square

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

the last one

Step-by-step explanation:

congruent means they are the same and all sides of a square are the same size.

Answer:

y=17

Step-by-step explanation:

move the constant to the right hand side and change it's sign

y=41-24

then subtract the numbers y= 41-24

which = 17

Answer: i believe it is 24 + 17 = 41  ^^       can you give me brainly when you get the chance

Step-by-step explanation:

Answer:

104/4 pi

Step-by-step explanation:

Answer: The circumference of a circle is:

Radius = r, Diameter = d, C = Circumference

C=2πr (as 2r=d)

C=πd

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If the radius of the circle is 26" then its diameter must be 52".

This means that the bicycle wheel has a circumference of 52π".

I'm going to divide 52π" into 360 parts (because a circle is made up of 360 degrees). I'll then multiply this value by 80 to give you an answer.

Answer:

145°

Step-by-step explanation:

x°+70°=(2x-5)°

x°+70°=2x°-5°

70°+5°=2x°-x°

75°=x°

x=75

JKM=(2x-5)°

=(2x75-5)°

=(150-5)°

=145°

Step-by-step explanation:

hope it helps you..........

Answer:

Step-by-step explanation:

x + ab = p

x = p - ab

Answer: No

Step-by-step explanation:

We know that A+B = 90, but without further information we cannot determine the specific values of A and B.

Answer:

150%

Step-by-step explanation:

given:

original quantity = 14

new quantity = 35

increased quantity = 35 - 14

=21

percent change = increased quantity /original quentity * 100%

=21/14 *100%

=21100/14 %

=150 %

Answer: Imma say C

Step-by-step explanation:

Answer:

c and d

Step-by-step explanation:

Given:

Angle of depression from observation deck to a ship = 67°

Height of observation deck = 1014 feet.

To find:

The horizontal distance from the base of the skyscraper out to the ship.

Solution:

Let x be the horizontal distance from the base of the skyscraper out to the ship.

Using the given information draw a diagram as shown below.

In a right angle triangle,

[tex]\tan\theta=\dfrac{Perpendicular}{Base}[/tex]

For triangle ABC,

[tex]\tan A=\dfrac{BC}{AB}[/tex]

[tex]\tan (67^\circ)=\dfrac{1014}{x}[/tex]

[tex]x=\dfrac{1014}{\tan (67^\circ)}[/tex]

On further simplification, we get

[tex]x=\dfrac{1014}{2.35585}[/tex]

[tex]x=430.41789[/tex]

[tex]x\approx 430.4[/tex]

Therefore, the horizontal distance from the base of the skyscraper out to the ship is 430.4 feet.

Applying the Trigonometry ratio, TOA, the horizontal distance from the base of the  skyscraper out to the ship is: 430.4 ft.

Recall:

The situation described is shown in an image attached below, where:

To find BA, apply TOA, which is:

tan ∅ = Opp/Adjacent

tan 67 = 1014/BA

[tex]BA = \frac{1014}{tan(67)} \\\\\mathbf{BA = 430.4 $ ft}[/tex]

Therefore, applying the Trigonometry ratio, TOA, the horizontal distance from the base of the  skyscraper out to the ship is: 430.4 ft.

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Answers:

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Explanation:

The simple interest formula is

i = p*r*t

where in this case,

So,

i = p*r*t

i = 3000*0.10*0.25

i = 75 is the amount of interest earned

This adds onto the initial deposit to get the final balance when the CD matures (ie when you're able to withdraw the money without penalties)

The balance at maturity is p+i = 3000+75 = 3075 dollars

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In short, you deposit $3000 into the CD and have to wait 3 months for the amount to update to $3075.

Answer:

The appropriate answer is "144".

Step-by-step explanation:

Given:

Population standard deviation,

[tex]\sigma=10.4[/tex]

Margin of error,

[tex]E=1.7[/tex]

[tex]CL=95[/tex] %

[tex]CL=1-\alpha[/tex]

Or,

[tex]\alpha=1-CL[/tex]

  [tex]=1-0.95[/tex]

  [tex]=0.05[/tex]  

Now,

Critical value,

= [tex]Z_{\frac{\alpha}{2} }[/tex]

= [tex]Z_{\frac{0.05}{2} }[/tex]

= [tex]1.96[/tex]

The minimum sample size will be:

⇒ [tex]n=\frac{Z^2_{\frac{\alpha}{2} }(\sigma)^2}{E^2}[/tex]

By putting the values, we get

       [tex]=\frac{(1.96)^2(10.4)^2}{(1.7)^2}[/tex]

       [tex]=\frac{415.5074}{2.89}[/tex]

       [tex]=143.774[/tex]

or,

       [tex]=144[/tex]  

Answer:

f(x)=(x+4)+3

f(x)=4x+3

Step-by-step explanation:

the answer is in the above image

The area of the region is 0 square units.

In mathematics, integration is a technique for combining or adding the parts to arrive at the total. It is a form of differentiation in reverse where we break down functions into their component elements. This technique is employed to determine the summation on a sizable scale.

Given:

y = x³ - x.

For the boundness

x³ - x=0

x(x² - 1)= 0

x= 0, x= ±1

Now, [tex]\int\limits^1_{-1} {x^3-x} \, dx[/tex]

= [tex][x^4/4]_{-1}^{1} \; - [x^2/2]_{-1}^{1}[/tex]

= [ 1/4 - 1/4] - ( 1/2 -(-1/2))

=0 - 0

= 0 square units

hence, the area of the region is 0 square units

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Answer:

0

Step-by-step explanation:

Ignore the next 2 numbers after 0.05. To the nearest whole number, round 0.05 to the nearest tenth, 0.1. Then round that to the nearest whole number, 0, which is your answer.

Answer:

6x + 12

Step-by-step explanation:

Distribute the 4 first. Now you have 4x + 12 + 2x. 4x + 2x are like terms and therefore they can be added. Your final simplified answer is therefore 6x + 12.