I need help ASAP please!!!!!!

Answer:

Step-by-step explanation:

Adding and subtracting expressions:

a) M + (5x² -2xy) = 6x² +9xy - y²

                      M = 6x² + 9xy - y² - (5x² - 2xy)

Remove the parenthesis by mulplying each term of 5x² - 2xy by (-1) as (-1) is outside the parenthesis

                           = 6x² + 9xy - y² - 5x² + 2xy

Combine ( add or subtract) like terms.

                           = 6x² - 5x² + 9xy + 2xy - y²

                           = x² + 11xy - y²

Hint: Like terms have same variable with same power.

Here, like terms are (i) 6x² and (-5x²)  (ii) 9xy and 2xy

b)               (3xy - 4y²) - N = x² - 7xy + 8y²

                   3xy - 4y²       = (x² - 7xy + 8y²) + N

3xy - 4y² - (x² - 7xy + 8y²) = N

3xy - 4y² - x² + 7xy - 8y² = N

3xy + 7xy -4y² - 8y² -x²   = N

          10xy -12y²  - x²     = N

Answer: N =  10xy - 12y² -x²

Answer:

area of the rectangle will be 175 square feet

Answer:

%70

Step-by-step explanation:

percentage can be found by dividing the values than multiplying the values by 100

Formula: (value/totalvalue)100

plug in the formula with what we have;

28/40(100)

→ First step; dividing our value by total value (28/40)

28/40 = 0.7

  → Second step; multiplying our value by 100 (0.7)

0.7 * 100 = 70

Therefore cora got %70 correct on her grammar sheet

Answer:

70% correct

Step-by-step explanation:

We know that there are 40 questions on her grammar worksheet.

Out of those 40 questions, she got 28 right so 28/40 equals 0.7

Answer:

145600000

Step-by-step explanation:

Please mark as branliest !

Answer:

Brand A is the better deal!

Step-by-step explanation:

Let's start by comparing.

We know brand B has the following cost: 5 ounces = $3.75

10 ounces $7.50 and 16 ounces = $12

Now check the graph.

6 ounces cost $3

12 ounces cost $6

20 ounces cost $10

I don't think we need to look any further but brand A is the better deal!

Answer:

Answer is D. [tex]\frac{121}{49}a^8b^2[/tex]

Step-by-step explanation:

We expand the powers.

[tex]\frac{11}{7}^2*(a^4)^2*(b)^2\\\frac{11}{7}*\frac{11}{7}*(a^4)(a^4)*(b*b)\\\frac{121}{49}*(a^8)*(b^2)[/tex]

when doing variable power you add them together.

a^4*a^4=a^(4+4) , b^1*b^1=b^(1+1)

The Probability of red light is 0.3

P(red) = 0.3

The probability that out of the next eight eastbound cars that arrive randomly at the light, exactly three will be stopped by a red light be 0.25.

P(exactly three get stopped by red light)=0.25

The correct option is (d) P(red)=.3,P(exactly 3 get stopped)=.25

A binomial distribution can be thought of as simply the probability of a SUCCESS or FAILURE outcome in an experiment or survey that is repeated multiple times.

The occurrence,

p= probability of a red light

 =[tex]\frac{15}{15+5+30}[/tex]

 = [tex]\frac{15}{50}[/tex]

 = 0.3

Hence, Probability of getting red light be,

P (red)= 0.3

Now, the Binomial distribution formula,

Probability=( [tex]_r^nC[/tex])[tex]\;p^{r} \;q^{n-r}[/tex]

where, r = number of times for a specific outcome within n trials

[tex]_r^nC[/tex]   = number of combinations

p = probability of success on a single trial

q = probability of failure on a single trial

n = number of trial

According to question,

          = 1- 0.3

          = 0.7

Now using the formula, ( [tex]_r^nC[/tex])[tex]\;p^{r} \;q^{n-r}[/tex]

P( exactly 3  get stopped) = ( [tex]_3^8C[/tex])[tex]\;(0.3)^{3} \;(0.7)^{8-3}[/tex]

                                            = [tex]\frac{8!}{3!(8-3)!}[/tex] [tex](0.027) \; (0.7)^{5}[/tex]

                                           =  [tex]\frac{8!}{3!(5)!}[/tex][tex](0.027) \; (0.16807)[/tex]

                                           = [tex]\frac{8 * 7 * 6 }{3 * 2}[/tex] x 0.027 x 0.16807

                                           = 56 x 0.00453789

                                           = 0.25412184

                                          ≈ 0.25

Hence, Probability of next eight eastbound so that exactly three will stopped by a red light be 0.25.

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Answer: 160

Step-by-step explanation: The formula for a rectangular prism is (Base)(Width)(Height). The length is 10 and the height and width are both 4 because it is a square.

The area painted red on one of the front wheels on DeMarius’ car will be 80.42 inches².

From the information given, the The front wheels on DeMarius’ car are divided into sectors of equal area and the radius of each wheel is 8 inches. The area will be:

= 2/5 × πr²

= 0.4 × 3.14 × 8²

= 80.42 inches²

The radius, in feet, of a rear wheel on the car will be:

r1(2π) = r2(2π)

8(2π) = r2(8/5)(2π)

16 = r2(8/5)

r = 5/8 × 16

r = 10 inches

r = (5/6) feet

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Answer:

(x + 2)

Step-by-step explanation:

x² - 8x - 20

consider the factors of the constant term (- 20) which sum to give the coefficient of the x- term (- 8)

the factors are - 10 and + 2 , since

- 10 × + 2 = - 20 and - 10 + 2 = - 8 , then

x² - 8x - 20 = (x - 10)(x + 2)

Answer:

(×+ 2)

Step-by-step explanation:

just did that trust me

This experiment is neither the subject nor the researcher because knows which treatment group each subject is in.

A scientific procedure undertaken to make a discovery, test a hypothesis, or demonstrate a known fact.

A group of doctors are conducting an experiment to test a new nutritional supplement they randomly selected 600 subjects, assigning 300 subjects to receive the supplement and 300 subjects to receive a placebo.

The doctors are unaware of which subjects are assigned to each treatment group. this experiment is neither the subject nor the researcher because know which treatment group each subject is in.

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Answer:

12.3 feet

Step-by-step explanation:

all you have to understand is that a radius is half the diameter....

24.6/2=12.3

Answer:

i will give it to you

Step-by-step explanation:

that's it for you dear

The relationship between food purchased and food eaten by dogs can be written as, 162 biscuits ≥ 80 biscuits

The fundamental concept of repeatedly adding the same number is represented by the process of multiplication. The results of multiplying two or more numbers are known as the product of those numbers, and the components that are multiplied are referred to as the factors.

First, let's calculate the total number of dog biscuits that Jim has bought:

= 6 bags × 27 biscuits per bag

= 162 biscuits

Next, let's calculate how many biscuits the dog will eat in 4 weeks:

= 4 weeks × 5 biscuits per day

= 20 biscuits per week

20 biscuits per week × 4 weeks = 80 biscuits

So, Jim has bought 162 biscuits and his dog will eat 80 biscuits in 4 weeks. This means that Jim has brought enough dog biscuits for his dog for 4 weeks.

162 biscuits ≥ 80 biscuits

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Step-by-step explanation:

y = –3x –3

y = –2x –3

y = 2x –3

y = 3x –3

Answer:

the correct answer is C.) y = 2x -3

Step-by-step explanation:

edge 2022

Answer:  [tex]\sqrt{14}[/tex]

Work Shown:

[tex]\text{x} = \text{geometric mean of A and B}\\\\\text{x} = \sqrt{A*B}\\\\\text{x} = \sqrt{2*7}\\\\\text{x} = \sqrt{14}\\\\[/tex]

Answer:

cinder cone: estimated probability = 0.35

shield: estimated probability = 0.49

stratovolcano: estimated probability = 0.16

Step-by-step explanation:

Given that he had seen 13 cinder cone volcanoes, 18 shield volcanoes, and 6 stratovolcanoes.

So the total number of volcanoes are 13 + 18 + 6 = 37

So the estimated probability of Cinder cone is \frac{13}{37}\approx 0.35

37

13

​

≈0.35

The estimated probability of Shield is \frac{18}{37}\approx 0.49

37

18

​

≈0.49

The estimated probability of Stratovolcano is \frac{6}{37}\approx 0.16

37

6

​

≈0.16

Below is the completed table

Answer: 26 + 13 + 26 + 13 + x =180

Step-by-step explanation:

Answer:

67.5 kg

Step-by-step explanation:

To determine the weight of 45 books, we need to determine the weight of one book, using the equation (30 books = 45 kg). This can be done by dividing 30 to both sides of the equation. Therefore,

We obtained the following equation;

Now, multiply both sides by 45 to determine the weight of 45 books.

Therefore, the weight of 45 books is 67.5 kg.

Answer:

[tex]\huge\boxed{\bf{45books = 67.5kg}} [/tex]

Step-by-step explanation:

Given:-

To find:-

Ans:-

30books = 45kg

45books = y kg

Let's find 45 books (y)

[tex]\sf \to \frac{30}{45} = \frac{45}{y}[/tex]

[tex]\sf \to 45*45 = 30*y[/tex]

[tex]\sf \to 2,025 = 30*y[/tex]

[tex]\sf \to y = \frac{2,025}{30}[/tex]

[tex]\sf \to y = 67.5kg[/tex]

~therefore 45books = 67.5kg

[tex]\:[/tex]

[tex]\huge\colorbox{red}{BlackPain}[/tex]

Answer:

X = 10

Step-by-step explanation:

Since 2x = 20

we can divide 2 from both sides giving us x = 20/2

Therefore , x = 10 because 20 divided by 2 is 10

Answer:

X= 10

Step-by-step explanation:

2X=20

Then Divide both sides by 2 in order to find the value of X

2X/2=20/2

X= 10

Answer:

the weight of 24 bricks is :

[tex]124\frac{4}{5}[/tex]

Step-by-step explanation:

[tex]26\frac{1}{4} =26+\frac{1}{4} =\frac{26\times 4}{4} +\frac{1}{4} =\frac{105}{4}[/tex]

It is clear that there is a proportional relationship between the number of bricks and their weights then :

[tex]\frac{26\frac{1}{4} }{5} =\frac{x}{24} \Longrightarrow \frac{\left( \frac{105}{4} \right) }{5} =\frac{x}{24} \Longrightarrow \frac{26}{5} =\frac{x}{24}[/tex]

[tex]\Longrightarrow x=\frac{26\times 24}{5} =\frac{624}{5} =124\frac{4}{5}[/tex]

Answer: The Answer for part 1 is 73 The answer for part 2 is 51

I hoped this helped also (im only 14 so if u see this ur doing great)

Step-by-step explanation:

Answer:

The area of the rectangle is 24.

Step-by-step explanation:

To find the area it is Legth x Width

Therefore, 4 * 6 is 24

first off, let's convert the mixed fraction to improper fraction and then proceed, let's notice that by PEMDAS or order of operations, the multiplication is done first, and then any sums.

[tex]\stackrel{mixed}{1\frac{7}{8}}\implies \cfrac{1\cdot 8+7}{8}\implies \stackrel{improper}{\cfrac{15}{8}} \\\\[-0.35em] ~\dotfill\\\\ -\cfrac{3}{4}~~ + ~~\cfrac{15}{8} \div \cfrac{1}{2}\implies -\cfrac{3}{4}~~ + ~~\cfrac{15}{8} \cdot \cfrac{2}{1}\implies -\cfrac{3}{4}~~ + ~~\cfrac{15}{4} \\\\\\ \cfrac{-3+15}{4}\implies \cfrac{12}{4}\implies 3[/tex]

Answer:

y = x^2 + 3x - 18

Step-by-step explanation:

A parabola with zeroes at  x = - 6  and 3  would look like this:

(x+6)(x-3) = x^2 + 3x -18

The answer will be option A Yes, the test value is in the rejection region.

A Z-score is a numerical measurement that describes a value's relationship to the mean of a group of values.

here the formula will be

[tex]Z=\dfrac{X-\mu}{\dfrac{\sigma}{\sqrt {n}}}[/tex]

[tex]Z=\dfrac{100-110}{\dfrac{5}{\sqrt{100}}}[/tex]

[tex]Z=-20[/tex]

Z critical value =-1.645

Z calculated> Z critical value so we will reject.

Hence the answer will be option A Yes, the test value is in the rejection region.

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Answer(s):

What is the dependent variable of an equation?

The dependent variable of an equation is the variable that is completely isolated on one side.

What is the independent variable of an equation?

The independent variable is the variable that is not isolated. The independent variable can either have a cooeficient or has some operation (+ - × ÷) included on that side of the equation.

Determining the independent and dependent variable

In this equation, we can see that "v" is completely isolated on one side and "t" has a cooeficient of 68. Thus, the dependent variable is "v" and the independent variable is "t".

Answer:

m<1=32

Step-by-step explanation:

Just do 102-38÷2 to get the measure

[tex]\qquad\qquad\huge\underline{\boxed{\sf Answer}}[/tex]

Let's evaluate ~

[tex]\qquad \tt \dashrightarrow \:6 \frac{5}{8} + 4 \frac{3}{4} [/tex]

[tex]\qquad \tt \dashrightarrow \: \frac{53}{8} + \frac{19}{4} [/tex]

[tex]\qquad \tt \dashrightarrow \: \frac{53 + 38}{8} [/tex]

[tex]\qquad \tt \dashrightarrow \: \frac{91}{8} [/tex]

[tex]\qquad \tt \dashrightarrow \: 11\frac{3}{8} [/tex]

[tex]6 \frac{5}{8} + 4 \frac{3}{4} [/tex]

the simplest form.

[tex] \frac{53}{8} + \frac{19}{4} [/tex]

[tex] = \frac{(53 \times 4) + (19 \times 8)}{8 \times 4} [/tex]

[tex] = \frac{212 + 152}{32} [/tex]

[tex] = \frac{364}{32} [/tex]

[tex] = 11 \frac{3}{8} [/tex]

Answer:

Slope-Intercept Form: [tex]y = 2*x -3[/tex]

or

Point-intercept form: [tex]y-(-3)=2(x-0)[/tex]

Step-by-step explanation:

Slope-Intercept Form: [tex]y=mx+b[/tex]

Start from the Y-axis where [tex]b=-3[/tex] then rise/run to the next point. making that our slope.

Point-intercept form: [tex]y-y_0=m(x-x_0)[/tex]

Solve the slope using the two points.

[tex](0,-3)[/tex] and [tex](2,1)[/tex] plug those values into the formula. Make [tex](x,y)=(0,-3)[/tex] and [tex](x_0,y_0)=(2,1)[/tex]

[tex]-3-1=m(0-2)[/tex]

[tex]-4=m(-2)[/tex]

[tex]m=-2[/tex]

[tex]y-(-3)=-2(x-0)[/tex]