Can someone help me I really need help

Answer: 4x^2 +x-5

Step-by-step explanation:

Answer: GIVE ME THANKS

Question 1: TRUE

Question 2: FALSE

QUESTION 3: TRUE

Question 4: False

Question 5 : False

Step-by-step explanation:

y = 9x + 22

y = price of the laptop

x = price of the television

Question 1: TRUE

y = 9(240) + 22

y = $2182

Question 2: FALSE

y = 9(280) + 22

y = $2542

Question 3: True

y = 9(424) + 22

y = $3838

Question 4: False

y = 9(480) + 22

y = $4342

Question 5: FALSE

y = 9(552) + 22

y = $4990

Answer:

Only statements A & C are true.

Step-by-step explanation:

Solving this problem entails of substituting the values provided in each option into the given equation, in order to determine which are true. Take a look at how each is solved.

Option One

        Given: y = 2,182; x = 240

        y = 9x + 22

        2,182 = 9(240) + 22

       2,182 = 9(240) + 22

       2,182 = 2,160 + 22

        2,182 = 2,160 + 22

        2,182 = 2,182

        2,182 = 2,182 true

Option Two

        Given: y = 2,527; x = 280

        y = 9x + 22

        2,527 = 9(280) + 22

        2,527 = 9(280) + 22

        2,527 = 2,520 + 22

        2,527 = 2,520 + 22

        2,527 = 2,542

        2,527 = 2,542 not true

Option Three

        Given: y = 3,838; x = 424

        y = 9x + 22

       3,838 = 9(424) + 22

       3,838 = 9(424) + 22

       3,838 = 3,816 + 22

       3,838 = 3,816 + 22

       3,838 = 3,838

       3,838 = 3,838 true

Option Four

        Given: y = 4,322; x = 480

        y = 9x + 22

        4,322 = 9(480) + 22

        4,322 = 9(480) + 22

        4,322 = 4,320 + 22

        4,322 = 4,320 + 22

        4,322 = 4,342

        4,322 = 4,342 not true

Option Five

        Given: y = 4,980; x = 552

        y = 9x + 22

        4,980 = 9(552) + 22

        4,980 = 9(552) + 22

        4,980 = 4,968 + 22

        4,980 = 4,968 + 22

        4,980 = 4,990

        4,980 = 4,980 not true

This proves that only options 1 & 5 are correct.

Answer: 5/7 of the kids chose New York or L.A.

Step-by-step explanation:

All you need to do in this problem is add the fraction of people that chose New York and the fraction of people that chose L.A:

4/7 + 1/7 = 5/7

Answer:

B

D

D

Step-by-step explanation:

please verify and rate 5 stars and say thank you

Step-by-step explanation:

the scale factor of similar objects apply to every line and side length.

we see here the ratio of small side length to large side length is 3/9 = 1/3.

so the small side length is 1/3 if the large side length.

a surface is airways the multiplication of 2 dimensions. so, the scale factor is to be used twice in this multiplication and therefore squares.

so, small surface to large surface is 1/3 × 1/3 = 1/9.

and a volume is airways the result of a multiplication of 3 dimensions. so, the scale factor is then 3 times in that multiplication and is therefore cubed.

so, small volume to large volume is 1/3 × 1/3 × 1/3 = 1/27

Answer:

correct answer is four sixths

Step-by-step explanation:

you can simplify 2/6 to 1/3 and then it would just be 1/3 plus 1/3. This is 2/3 or 4/6! Hope this helps :)

The difference between the population in City A and City B is 8.27 x \(10^{4}\) and 82,700.

The numbers are written in scientific notation. Scientific notation is a method that is used in mathematics to compress large numbers. In order to write a number in scientific notation, the number is written as a decimal number between 1 and 10 and multiplied by a power of 10. For example, 3 x 10² is equivalent to 300

Subtraction is the mathematical operation that is used to determine the difference between two or more numbers.

8.59 x \(10^{4}\) - 3.2 x 10³

(0.859 x \(10^{4 - 1}\)) - ( 3.2 x 10³)

(0.859 x  10³)- (3.2 x 10³)

0.827 x  10³

8.27 x \(10^{4}\) = 82,700

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The bus that is the most consistent, given the data collected on travel times to school from two groups of students is C Bus 18, with a range of 10

To determine which bus is the most consistent, we should use the interquartile range (IQR) as the measure of variability. The IQR measures the spread of the middle 50% of the data, which makes it less sensitive to outliers compared to the range.

Bus 47:

Median (Q2): 16

Q1: 10

Q3: 22

IQR = Q3 - Q1 = 22 - 10 = 12

Bus 18:

Median (Q2): 12

Q1: 8

Q3: 18

IQR = Q3 - Q1 = 18 - 8 = 10

Bus 18 has a smaller IQR than Bus 47 (10 vs. 12), which means the travel times for Bus 18 are more consistent.

Note: Figures might be different due to options being for different variant but Bus 18 is the most consistent.

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Answer:

b=109 degree

Step-by-step explanation:

26 + 45 + b=180 degree (being sum of interior angles of a triangle)

71 + b = 180

b=180-71

b=109 degree

Step-by-step explanation:

109°

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ask me anything

Answer:

r=4

Step-by-step explanation:

-6=0.75(r-12)

-6= 0.75r-9

3=0.75r

r=4

Answer:

The answer is b..

Step-by-step explanation:

hope its helpful

The kilograms of dough that Emmett prepare if he worked for 4 hours is 20 kilograms.

A proportional relationship simply means the relationship that has an equivalent ratio as well as a constant.

In this case, Emmett prepared 10 kilograms of dough after working 2 hours. The kilograms per hour will be:

= 10/2

= 5 kilograms per hour

Therefore, in 4 hours, the kilograms will be:

= Number of hours × 5 kilograms

= 4 × 5

= 20 kilograms

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Answer:

$8,000

Step-by-step explanation:

Let the store earned $x in December.

Therefore,

Money spent to buy new inventory \( =\frac{1}{4} x\)

Remaining money \( = x - \frac{1}{4} x =\frac{3}{4} x\)

Money used to pay bills \( =\frac{1}{2} \times \frac{3}{4} x=\frac{3}{8} x\)

Money still left over = $3,000

Total money earned in December \(= \frac{1}{4} x+ \frac{3}{8} x+3,000\)

\(\therefore x= \frac{1}{4} x+ \frac{3}{8} x+3,000\)

\(\therefore x= \frac{2}{8} x+ \frac{3}{8} x+3,000\)

\(\therefore x= \frac{5}{8} x+ 3,000\)

\(\therefore x- \frac{5}{8} x=3,000\)

\(\therefore \frac{8x-5x}{8} =3,000\)

\(\therefore \frac{3x}{8} =3,000\)

\(\therefore x =3,000\times \frac {8}{3}\)

\(\therefore x =1,000\times 8\)

\(\therefore x =\$8,000\)

Thus, total money earned in December is $8,000.

Answer:

Step-by-step explanation:

\((4-2)(6 - 5)\\\\Follow\:the\:PEMDAS\:order\:of\:operations\\\\\mathrm{Calculate\:within\:parentheses}\:\left(4-2\right)\::\quad 2\\=2\left(6-5\right)\\\\\mathrm{Calculate\:within\:parentheses}\:\left(6-5\right)\::\quad 1\\=2\times\:1\\\\\mathrm{Multiply\:and\:divide\:\left(left\:to\:right\right)}\:2\times\:1\:\\:\quad 2\)

Answer:

2

Step-by-step explanation:

Since this expression contains no variable, you can't "solve it."

All y ou can do is to "evaluate it."

(4 - 2) becomes 2 and (6 - 5) becomes 1.  

Thus, (4-2)(6 - 5) = (2)(1) = 2

Answer:

Equation: P(w) = 4w + 8

Step-by-step explanation:

The step is zero.  That and being told that the relationship is linear.

The general equation is P(w) = mw + y intercept.

When w = 0 then P(w) = 8

The only way that can happen is when P(w) = 0 + y intercept

y intercept = 8 because P(w) = 8

So far what we have is P(W) = mx + 8  So you are starting with 8 rats.

Now suppose w = 2. The number of rats P(2) that you get is 16

So you are solving for m.

16 = m*2 + 8                         Subtract 8 from both sides

16 - 8 = 2*m + 8 - 8              Combine

8 = 2m                                 Divide by 2

8/2 = 2m/2

m = 4

Answer:

The answer is "choice E"

Step-by-step explanation:

Please find the complete question in the attached file.

In this question, the choice E is correct because follows the following series:

\(n=12\\\\\Sigma x=33831 \\\\\Sigma x^2 = 101652609\\\\\Sigma y = 5396\\\\\Sigma y^2 = 2588426\\\\\Sigma xy= 15992663.000\\\\SSx= \frac{\Sigma x^2-( \Sigma x)^2}{n}= 6274562.2500\\\\SSy= \frac{\Sigma y^2-(\Sigma y)^2}{n}= 162024.6667\\\\SP= \frac{\Sigma xy-( \Sigma x \ \Sigma y)}{n}= 779990.0000\)

Answer:

x - 9 = -1

Step-by-step explanation:

When you see less than you switch the numbers. So, for instance, it says 9 less than x means x-9

(a) Randomized experiment, (b) There are three criteria for a randomized experiment

a) This is a randomized experiment.

b) The three criteria for a randomized experiment are:

Random assignment, the children were randomly assigned to the xylitol or placebo group.

Control group, a placebo group was used as a control.

Manipulation, the children were given different forms and doses of xylitol or placebo.

c) The explanatory variable is the form and dose of xylitol or placebo given to the children. The response variable is the incidence of ear infections.

d) Diagram of the randomized comparative experiment:

Population of healthy children in daycare centers

↓

Random assignment to xylitol or placebo group

↓

Intervention group: given xylitol in syrup, gum or lozenge form

Control group: given a placebo in gum, syrup or lozenge form

↓

Comparison of incidence of ear infections in intervention and control groups

↓

Analysis of results to determine the effectiveness of xylitol in reducing ear infections.

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Answer:

(7/2+2/5)+8/3

=(3.5+0.4)+2.66

=(3.9)+2.66

=6.56

so its 6.56

Step-by-step explanation:

Let \(x\) and \(y\) be the amounts of available alloy (AA) and pure magic steel that are used, so we also have

\(x + y = 2.7\)

DA13 is supposed to contain 7% gold, 3% silver, and 90% steel, so that 2.7 kg of it is made up of

\(0.07 \times 2.7 \,\mathrm{kg} = 0.189 \,\mathrm{kg} \text{ gold}\)

\(0.03 \times 2.7 \,\mathrm{kg} = 0.081 \,\mathrm{kg} \text{ silver}\)

\(0.90 \times 2.7 \,\mathrm{kg} = 2.43 \,\mathrm{kg} \text{ magic steel}\)

For each kg of the available alloy (AA), there is a contribution of 0.21 kg of gold, 0.09 kg of silver, and therefore 0.70 kg of steel; \(x\) kg of it will contain \(0.21x\) kg of gold, \(0.09x\) kg of silver, and \(0.70x\) kg of steel. Each kg of magic steel of course contributes 1 kg of steel; \(y\) kg of it will contribute \(y\) kg of steel.

Then the dwarves need

• total gold: \(0.21x = 0.189\)

• total silver: \(0.09x = 0.081\)

• total steel: \(0.70x + y = 2.43\)

Solve for \(x\) and \(y\). The first two equations are consistent and give \(x = 0.90\), and substituting this into the third we find \(y = 1.80\). So the dwarves must combine 0.90 kg of AA and 1.80 kg of magic steel.

Answer:

\(144 \times 6^{-2}\\\\= 144 \times \frac{1}{36}\\\\= \frac{144}{36}\\\\= \frac{12}{3}\\\\= 4\)

Answer: 0%

Step-by-step explanation:

There's 40 students, and 40 students read physics. That means that every student reads physics. So, no student could read only chemistry.

In this case, we'll have to carry out several steps to find the solution.

Step 01:

Data:

(x + p)(x + q)

Step 02:

binomials and trinomials:

(x + p)(x + q) = x² + qx + px + pq

(px + qx) = (p + q)x

The answer is:

The coefficient of the x-term

a) The probability that exactly one of them will be a girl = 0.3407

b) The probability that at least one of them will like the football = 0.7672

a) If we select three students then the probability that exactly one of them will be a girl

From the attached two way table we can observe that the total number of girls = 22

the total number of boys = 18

and the total number of students = 40

The possible outcomes for selecting 3 students from 40 would be,

⁴⁰C₃

Using combination formula,

⁴⁰C₃ = 40! / (3! × (40 - 3)!)

      = 9880

If there is exactly one girl then other two must be boys in the set of 3 selected students.

So, the required probability would be,

P = (²²C₁ × ¹⁸C₂) / ⁴⁰C₃

P = (22 × 153)/9880

P = 0.3407

b) The number of students like the football = 15

and the number of students who don't like the football are 40 - 15 = 25

The probability that at least one of them will like the football would be,

P = (¹⁵C₃ × ²⁵C₀ + ¹⁵C₂ × ²⁵C₁ + ¹⁵C₁ × ²⁵C₂) / ⁴⁰C₃

P = ((455 × 1) + (105 × 25) + (15 × 300)) / 9880

P = 0.7672

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Answer:

83

Step-by-step explanation:

Answer:

83

Step-by-step explanation:

Hail Hydra

The sample that is most representative of the population is: sample 3.

A representative sample of a population can be defined as a subset of that particular population that reflects almost or same characteristics of the main population such as the shape, center, and spread.

From the three dot plots given, the one that has almost same pattern and characteristics is sample 3 considering it has almost similar spread and shape.

Thus, the most representative sample is: sample 3.

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In the given function H(p) = p/5 + 15, the independent variable is "p" ,

The independent variable in this function is denoted by "p." The independent variable can also be referred to as the input variable, which means that it is the value that is inputted into the function to produce an output. In this specific function, "p" represents the price of a good or service.

It is important to distinguish between the independent and dependent variables in a function. The dependent variable is denoted by "H(p)" in this case, and it is the output of the function. The value of the dependent variable is determined by the independent variable. In this function, "H(p)" represents the total cost of the good or service, which is dependent on the price "p." p is the input variable representing the price of the good or service.

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Answer:

< R= 22.62

Step-by-step explanation:

I just took the test.

Answer:m∠R= 23°

in triangle PQE

sin R=PQ/PR

sinR=5/13

R=sin-¹(5/13)=22.62°