(7^2 - 46 ) + (2^2 x 3 )

(49-46) + ( 4 x 3 )

(3) + (12)

= 15

(49-46) + ( 4 x 3 )

(3) + (12)

= 15

A group of scientists is conducting an experiment on the effects of media on children. They randomly select 100 children and randomly assign

each child to one of four treatment groups. Each treatment group has a specific amount of screen time during a one-week time frame. The

first group has no screen time, the second group has two hours of screen time, the third group has four hours of screen time, and the fourth

group has six hours of screen time,

After the first week, the scientists conduct the same experiment, with the same subject groups, for three more weeks so that each group

experiences each of the four treatments.

Which statements about this study are true?

This study uses blinding.

This study uses random sampling

This study uses a control group.

ооо

This study uses blocking.

This study uses a repeated measures design.

The **statements **that are **true **about this **study **are:

**Random sampling** occurs when each sample has an **equal **probability of being chosen in a study.

This is seen in the **random **selection of **100 **children. The **Control **group was used with the **first **group that had **no screen **time.

The **repeated measures design **was also used when **multiple **measurements were taken during **different **weeks.

Learn more about **experiments **here:

https://brainly.com/question/17216882

HELP

please help me!! will mark whoever gets it right brainlist

(question is in image below) ⬇️

**Answer:**

[tex](x-6)^2=8[/tex]

**Step-by-step explanation:**

[tex]x^2-12x+32=4[/tex]

[tex]x^2-12x+32+4=4+4[/tex]

[tex]x^2-12x+36=8[/tex]

[tex](x-6)^2=8[/tex]

Basically, you need to add a number to both sides so that you can reduce the left side to a square. In this case, you add 4.

(01.04 MC)The elevation of city A is 80 feet below sea level; the elevation of city C is 16 feet below sea level. The elevation of city D is 1 over 2 of the elevation of city C. Part A: Write an expression to represent the elevation, in feet, of city D. (5 points) Part B: Solve the expression and explain why the answer is negative or positive. (5 points)

A) The **expression** to represent the **elevation in feet** of city D is;** **¹/₂ × (-16) ft

B) The **solution** to the expression of the elevation of City D is; -8 fr which is negative because it falls below sea level.

First of all, sea level is at 0 ft.

Thus;

If city A has an elevation of 80 ft below sea level, then;

**Elevation of city A** = -80 ft

The elevation of city C is 16 feet below sea level. Thus;

**Elevation of city C** = -16 ft

A) The elevation of city D is ¹/₂ of the elevation of city C. Thus;

Expression for **Elevation of city D** = ¹/₂ × (-16)

B) Solving the expression for elevation of city D gives;

Elevation of City D = -8 ft

The reason why the answer is negative is because any distance below sea level is considered to be negative and city C which is twice the elevation of city D is negative, and so city D must also have a **negative elevation.**

Read more about **below** **sea level elevations** at; https://brainly.com/question/14837848

**Answer:**

**A) The expression to represent the elevation in feet of city D is; ¹/₂ × (-16) ftB) The solution to the expression of the elevation of City D is; -8 fr which is negative because it falls below sea level.First of all, sea level is at 0 ft.Thus;If city A has an elevation of 80 ft below sea level, then;Elevation of city A = -80 ftThe elevation of city C is 16 feet below sea level. Thus;Elevation of city C = -16 ftA) The elevation of city D is ¹/₂ of the elevation of city C. Thus;Expression for Elevation of city D = ¹/₂ × (-16)B) Solving the expression for elevation of city D gives;Elevation of City D = -8 ftThe reason why the answer is negative is because any distance below sea level is considered to be negative and city C which is twice the elevation of city D is negative, and so city D must also have a negative elevation.**

What is 20% of 130.8?

**Answer:**

26.16

**Step-by-step explanation:**

**Answer:**

26.16

**Step-by-step explanation:**

20 percent of 130.8

= (20/100)*130.8

= (20*130.8)/100

= 2616/100 = 26.16

Which shows two triangles that are congruent by AAS

**Answer:**

answer A is the correct option.

**Step-by-step explanation:**

The **triangles **( A )** **are **congruent **by AAS theorem

Transformations change the size or position of shapes. **Congruent **shapes are identical, but may be reflected, rotated or translated. Scale factors can increase or decrease the size of a shape. **Congruent **Triangles simply mean the **triangles **that possess the same size and shape

The three sides are equal (SSS: side, side, side)

Two angles are the same and a corresponding side is the same (ASA: angle, side, angle)

Two sides are equal and the angle between the two sides is equal (SAS: side, angle, side)

A right angle, the hypotenuse and a corresponding side are equal (RHS, right angle, hypotenuse, side)

Given data ,

Let the first **triangle **be represented as ΔABC

Let the second **triangle **be represented as ΔABD

Now , AB is the common side of both the triangles

And , measure of ∠ACB = measure of ∠ADB

And , the measure of ∠ABC = measure of ∠ABD = 90°

So , Two angles are the same and a corresponding side is the same (ASA: angle, side, angle)

Hence , the **triangles **are **congruent**

To learn more about **congruent triangles **click :

https://brainly.com/question/26131452

#SPJ5

Help a bro outttttttt

**Answer:**

**Step-by-step explanation:**

pick any 2 sides

3x+6=6x-3

+3

3x+9=6x

-3x

9=3x

/3

x=3

3*9x=27

27-12=15

Write 23/18 as a decimal.

**Answer:**

hi

**Step-by-step explanation:**

the answer would be 1.2778

PLEASSEEE HELPP!!!!!

**Answer:**

m

**Step-by-step explanation:**

If a line crosses the y-axis at (0, -3), what is the y-intercept?

**Answer:**

Isnt it -3?

**Step-by-step explanation:**

Here is my question

**Answer:**

[tex]\frac{17}{24}[/tex]

**Step-by-step explanation:**

Step 1 :

4 - 1 [tex]\frac{3}{5}[/tex] = 2 [tex]\frac{2}{5}[/tex]

Step 2 :

1 ÷ 2 [tex]\frac{2}{5}[/tex] = 1 × [tex]\frac{5}{12}[/tex] = [tex]\frac{5}{12}[/tex]** **

Step 3:

[tex]\frac{2}{3}[/tex] + [tex]\frac{5}{12}[/tex] = [tex]\frac{8+5}{12}[/tex] = [tex]\frac{13}{12}[/tex] = 1 [tex]\frac{1}{12}[/tex]

Step 4:

3 ÷ [tex]\frac{13}{12}[/tex] = 3 × [tex]\frac{12}{13}[/tex] = [tex]\frac{36}{13}[/tex] = 2 [tex]\frac{10}{13}[/tex]

Step 5:

1 - 2 [tex]\frac{10}{13}[/tex] = - 1 [tex]\frac{10}{13}[/tex] = - [tex]\frac{23}{13}[/tex]

Step 6:

1 - [tex]\frac{16}{39}[/tex] = [tex]\frac{23}{39}[/tex]

Step 7:

[tex]\frac{23}{39}[/tex] ÷ ( - [tex]\frac{23}{13}[/tex] ) = - [tex]\frac{23}{39}[/tex] × [tex]\frac{13}{23}[/tex] = - [tex]\frac{1}{3}[/tex]

Step 8:

[tex]\frac{3}{8}[/tex] - ( - [tex]\frac{1}{3}[/tex] ) = [tex]\frac{3}{8}[/tex] + [tex]\frac{1}{3}[/tex] = [tex]\frac{9+8}{24}[/tex] = [tex]\frac{17}{24}[/tex]

First National Bank is offering 4.25% interest on an account. Susan makes an

initial deposit of $20,000. Calculate the interest camed over 20 years if the

bank...

a) Calculates the interest using simple interest (I -- Prt).

b) Calculates the interest using compound interest compounded annually.

c) Calculates the interest using compound interest compounded quarterly.

d) Calculates the interest using compound interest compounded monthly.

The simple interest earned is **$17,000. **

The **interest earned **with **annual compounding is $25,978.13.**

The **interest earned **with** quarterly compounding is $26,583.59.**

The **interest earned **with **monthly compounding is $26,722.72.**

The formula that can be used to determine **simple interest **is: principal x time x interest rate

$20,000 x 20 x 0.0425 = **$17,000**

The formula that can be used to determine the **interest earned **with **compounding **is: Future value - amount invested.

The formula that can be used to determine future value is:

FV = P (1 + r/m)^nm

FV = Future value

P = Present value

R = interest rate

m = number of compounding

N = number of years

**Annual compounding = **$20,000 x (1.0425)^20 = $45,978.13

**Interest earned = ** $45,978.13 - $20,000 = **$25,978.13**

**Quarterly compounding = **$20,000 x (1 + 0.0425/4)^80 = $46,583.59

**Interest earned = **$46,583.59 - $20,000 =** $26,583.59**

**Monthly compounding** = $20,000 x (1 + 0.0425 /12) ^240 = $46,722.72

**Interest earned = ** $46,722.72 - $20,000 =** $26,722.72**

To learn more about future value, please check: https://brainly.com/question/18760477

4. Write an equation of the vertical line that passes through the point (-2,-8)

X=-2

You can know this because when you have only an x value you graph it by drawing a line straight up from there because there is every possible y value.

You can know this because when you have only an x value you graph it by drawing a line straight up from there because there is every possible y value.

(5 + 13 + 21 + ......... + 18) = ?

Correction:

5+13+21+...+181

First term = 5

Common difference = 13-5 = 8

Last term = an = 181

⇛a+(n-1)d = 181

⇛5+(n-1)(8) = 181

⇛ 5+8n-8 = 181

⇛ 8n-3 = 181

⇛ 8n = 181+3

⇛ 8n = 184

⇛n = 184/8

⇛ n = 23

Sum of the first n terms = Sn = (n/2)(a+an)

Sum of 23 terms = S 23

⇛(23/2)(5+181)

⇛ (23/2)(186)

⇛23×93

⇛2139

This is the question but thank you

Answer:

8200/1000 = 8.2 so each time a class sells 8.2 bars, they receive 1 dollar.

If a class sold 16 bars, the class receives 2 dollars, if it sold 82 bars, it receives 10 dollars and so on.

If 20 students have only airpods,

10 students only have beats, and 30

students have beats in total how

many students have both beats and

airpods?

**Answer:**

There should be **20 students** that have both Beats and AirPods.

**Step-by-step explanation:**

There are **50 students in total.**

**20 students** have only **AirPods** and **30 students** have **Beats**. Out of the 30 who own Beats, there are **10 students **that have **ONLY Beats**.

30 - 10 = 20.

It's a tricky question, but this is the correct answer!

**Hope This Helps!**

A certain shampoo is available in two sizes. A 14.2 -ounce bottle costs 3.98$ . A 33.9 -ounce bottle costs 9.98$ .

Find the unit price for each size. Then state which size is the better buy based on the unit price.

Round your answers to the nearest cent.

**Answer:**

14.2 ounce for $3.98 is more cheaper

**Step-by-step explanation:**

unit price formula; cost ÷ quantity

3.98 / 14.2 =** 0.280**2816901408

9.98 / 33.9 = **0.294**3952802359

round answers to the nearest hundredth;

$0.28

$0.29

compare the answers

13/83.2, I have the answer but not the work

**Answer:**

6.4 is the correct answer

Help!!!! Need this asap!!!

**Answer:**

**the graph is in link**

**Step-by-step explanation:**

y ..... means full line and shading above the line

Y< ......means doted line and shading below the line

A) solution is overlapping shaded part

B) (10,5)

plug in point in inequalities and check if it's true; if it's true you showed that solution is correct

1. 5-1/2*10 + 2 1/2

5 -5 + 2 1/2

5 -2 1/2 TRUE

2. 51/5*10 + 6

5< 2 + 6

5< 8 TRUE

Windstrong has an elevation of -28.7 feet, and Kennington has an elevation of 28.7 feet. Which of the following is true?

A.

Windstrong's elevation < Kennington's elevation

B.

Windstrong's elevation = Kennington's elevation

C.

Windstrong's elevation > Kennington's elevation

**Answer:**

b

**Step-by-step explanation:**

Use square roots to solve the equation x ^ 2 = - 25 over the complex numbers. Select any solutions that apply A.-5 B. -5i C. -5i^2 D.5i

**Answer:**

**B. **[tex]-5i[/tex]

**D. **[tex]5i[/tex]

**Step-by-step explanation:**

Remember that the imaginary unit is equal to:

[tex]i^2 = -1[/tex]

And getting the square root in both sides of the equation we get:

[tex]i = \sqrt{-1} \quad \land \quad -i = \sqrt{-1}[/tex]

The with our expression we develop of the next way:

[tex]x^2 = -25\\x = \sqrt{-25}[/tex]

However in the real numbers doesn't exist solution for such operation then you use the complex numbers for represent the operation.

[tex]x = 5i \quad \land \quad x = -5i[/tex]

In this occasion we use [tex]i[/tex] and [tex]-i[/tex] because both represent a negative square root, so our final answer is:

B and D

the degree of the polynomial p³q²-6p²q⁵+p⁴q⁴

**Step-by-step explanation:**

[tex]p^{3}q^{2}-6p^{2} q^{5} +p^{4} q^{4}[/tex]

So since the highest index/power is 5 the degree is 5

Hope that helps :)

find the discriminant of -2x^2+8=x^2-28

**Answer:**

If I'm not wrong I think the answer should be (-28)

Solve 4(x + 6) = 2(2x + 12)

**Answer:**

Infinitely many solutions

**Step-by-step explanation:**

[tex]4(x+6)=2(2x+12)[/tex]

[tex]4(x+6)=2(2(x+6))[/tex]

[tex]4(x+6)=4(x+6)[/tex]

Infinitely many solutions

**Answer:**

Hiya There....!!!

______________________

Any value of x makes the equation true. Always true

Interval Notation:

( − ∞ , ∞ )

**_______________________**

**“Most things are forgotten over time. Even the war itself, the life-and-death struggle people went through is now like something from the distant past. We’re so caught up in our everyday lives that events of the past are no longer in orbit around our minds. There are just too many things we have to think about everyday, too many new things we have to learn. But still, no matter how much time passes, no matter what takes place in the interim, there are some things we can never assign to oblivion, memories we can never rub away. They remain with us forever, like a touchstone.”
**

*__________________________*

*Think of life as a mytery because well it sort of is! You don't know what may happen may be good or bad but be a little curious and get ready for whatever comes your way!! ** ~Ashlynn*

6x−36x2/ 6x simplified

**Answer:**

1x-72

**Step-by-step explanation:**

-36x2= -72

6x-72/6x

6x/6x=1x

1x-72

Help help help math math

**Answer:**

I think its vertical opposite angle

PLZ HELP ME WITH MY MATH HOMEWORK!!! SHOW WORK!!!

Explanation:

(I). 5/6 (4X+8) = (3/8) X - (1/4)

→ [{5(4X) + 5(8)}/6] = (3/8)X - (1/4)

→ [{20X + 40}/6] = (3/8)X - (1/4)

→ [{(20X/6) + (40/6) = (3/7)X - (1/4)

Now,

shift all variables fraction on LHS and constant fraction on RHS.

→ [(20X/6) - (3X/7)]= -(1/4) - (40/6)

Take the LCM of LHS denominator of 6&7 is 42.

→ [(140X - 18X)/42] = -(1/4)-(40/6)

→ [(122X)/42] = -(1/4)-(40/6)

Again take the LCM of the denominator in RHS i.e 4&6 is 12.

→ [(122X)/42] = (-12 - 80)/4

→ [(122X)/42] = (-92)/4

By doing Cross multiply the fraction, we get

→ 4(122X) = 42(-92)

→ 488X = -3 864

→ X = -3 864÷488

Therefore, X = -3864/488

Answer: Hence, the value of X for the given problem is -3864:488.

Explanation:

ii)**Given**** ****algebraic**** equation**** ****is:** 5(3p-5)+4p=5p-6(p+4)

→ 15p - 25 + 4p = 5p - 6p + 24

Shift all variables in LHS and constant on RHS.

→ 15p + 4p +6p = 25+24

→ 19p + 6p = 49

→ 25p = 49

Shift the number 25 from LHS to RHS.

Therefore, p = 49/25.

Answer: Hence, the value of P for the given algebraic equation is 49/25.

Write the expression:

the sum of a number and it's opposite

**Answer:**

0

**Step-by-step explanation:**

-5 5

<-+-+-+-+-+-+l-+-+-+-+-+->

l 0 l

<-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+->

-8 -7 -6 -5 -4 3 -2 -1 0 1 2 3 4 5 6 7 8

graph l. (l points down). Thanks!

**Answer:**

the sum of a number and it's opposite= x - (x)

**Step-by-step explanation:**

**The opposite number of 2 would be -2. The opposite number of 4 would be -4 and vice versa. **

**Because the oppposite number is just a number that is the opposite operation of something, finding the sum of a number and it's opposite will always make the sum 0. **

How would you write the quotient as a simplified fraction?

A) 851÷46 = 18 23/36

B) 851÷46 = 18 1/2

C) 851÷46 = 18.5

D) 851÷46 = 17 23/46

**Answer:**

The answer is b

**Step-by-step explanation:**

How many roots will the function f(x)= -3x³ - x² + 7x + 6 have?

**Answer:**

It will have 3 roots

The number of roots in an equation equals the highest power of that equation.

**Step-by-step explanation:**

Robin currently has 50 subscribers on her You.Tube channel, and Dimitri currently has 17 subscribers. Robin gains 4 subscribers every week, while Dimitri gains 7 subscribers each week.

Part A: Set up a system of equations to shows each person's subscribers.

Part B: After how many weeks will Robin and Dimitri have the same number of subscribers?

Part C: How many subscribers will Robin and Dimitri have when their subscriber count is equal?

**Answer:**

Part A :

Robin : 50 divided by 4 = 12.5, Robin took 12.5 Weeks to get to 50 subscribers.

Dimitri : 17 divded by 7 = 2.4, Dimitri took 2.4 weeks to get to 7 subscribers.

Part B : In 7 weeks, Dimitri will have 66 subscribers, And in 4 weeks, Robin will have 66 subscribers. So after 7 weeks for Robin and 4 for Dimitri

Part C , They will have 66 subscribers. After 7 weeks Dimitri will have 66 subcribers, and after 4 weeks Robin will have 66 subscribers.

**Explanation : **

**I have calculated out Robins and Dimitris subscribers counts with math. **

**Part A: The attached image is for Robin but I didn't have time for Dimitri.**

*Dimitri: **Currently has 17 subscribers, 7x11=77. 17+77 = 94 and the same goes for Robin. *

*Robin:** Currently he has 50 subscribers, 4x11=44. 50+44 = 94.*

**Part B: After 11 weeks Robin and Dimitri will have the same number of subscribers.**

**Part C: Robin and Dimitri will have 94 Subscribers when their subscriber count is equal.**

Which of the following shows the less amount from the original value? a. Gadget of 5000 with 5% discount price b. Mr Smith bought a leather bag for 25 and sold it for 45. c. A calculator marked 8.50 and Mr Smith pay 15% VAT for this item. d. Mr Smith sold of 875 for furniture with a gain of 6%.and explain why.
Which of the following is a healthy bedtime routine? A. eat a large meal, get into bed, read for 30 minutes B. take a bath, get into bed, discuss monthly budget and bills C. take a bath, read for 30 minutes, get into bed D. read for 30 minutes, get into bed, watch TV for an hour Please select the best answer from the choices provided. A B C D Mark this and return
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