help me plz ineed help

Answer

a) x > 2 OR x < -3

b) x < -4 OR x ≥ -5

Explanation

The compound inequalities to be solved and graphed include

a) (5x + 1) > 11 OR (x - 1) < -4

b) (-5x) > 20 OR (x - 2) ≥ -7

The first step is to solve these expressions

a) (5x + 1) > 11 OR (x - 1) < -4

5x + 1 > 11

Subtract 1 from both sides

5x + 1 - 1 > 11 - 1

5x > 10

Divide both sides by 5

(5x/5) > (10/5)

x > 2

OR

x - 1 < -4

Add 1 to both sides

x - 1 + 1 < -4 + 1

x < -3

So, the solution for this is x > 2 OR x < -3

b) (-5x) > 20 OR (x - 2) ≥ -7

(-5x) > 20

Divide both sides by -5

Note that dividing both sides by a negative number causes the inequality sign to change

(-5x/-5) < (20/-5)

x < -4

OR

(x - 2) ≥ -7

Add 2 to both sides

x - 2 + 2 ≥ -7 + 2

x ≥ -5

So, the solution for this is x < -4 OR x ≥ -5

In graphing inequality equations, the first thing to note is that whenever the equation to be graphed has (< or >), the circle at the beginning of the arrow is usually unshaded.

But whenever the inequality has either (≤ or ≥), the circle at the beginning of the arrow will be shaded.

Answer:

\(x∈( - ∞;8]\)

Step-by-step explanation:

\(x + 9 - 3 \leqslant 14\)

Collect like-terms:

\(x \leqslant 14 - 9 + 3\)

\(x \leqslant 8\)

\(x∈( - ∞;8]\)

Answer:

\(r=4.38\)

Step-by-step explanation:

Step 1: Arrange the equation so that you are calculating rate (divide both sides by t)

\(\frac{d}{t} = \frac{rt}{t}\)

\(t\) cancels out on the right side.

Step 2: Substitute in the numerals

\(r=\frac{d}{t}\)

\(r=\frac{5.7}{1.3}\)

Step 3: Divide

\(r=4.38\) \(mph\)

There's your answer!

Hope this helps you!

Answer:

Step-by-step explanation:

f(x) = 65536(b)^x

Find b by substituting a point. (1, 16384)

16384 = 65536(b)^1

b=0.25

Thus,

f(x) = 65536(1/4)^x

Plug in 6,

f(8) = 1

5 years longer then Bill, 2x5=10.

10+2=12.

12-5=7

Hoang has be there for 12 years. Bill has for 7 years.

Step-by-step explanation:

The graph looks like the above picture

Answer:

Image Attached

Step-by-step explanation:

Hello!

To have points with whole numbers, multiples of 3 need to be used for x.

x = 3

y = (1/3)(3)²y = (1/3)(9)y = 3

x = 6

y = (1/3)(6)²y = (1/3)(36)y = 12

x = 9

y = (1/3)(9)²y = (1/3)(81)y = 27

x = 12

y = (1/3)(12)²y = (1/3)(144)y = 48

x = 15

y = (1/3)(15)²y = (1/3)(225)y = 75

Two images are attached, one in correlation to y = x^2, and the original graph with the given points (3,3), (6,12), (9,27), (12,48), (15, 75).

The equation will be  \(y=40000+16000*x\)

Solve one of the equations for a particular variable. After that, insert that into the other equation and find the variable there. To find the value for the other variable, enter that value into either equation.

Equations come in two varieties: identities and conditional equations. All possible values of the variables result in an identity. Only certain combinations of the variables' values make a conditional equation true. Two expressions joined by the equals symbol ("=") form an equation.

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Domain: \(\{x \in \mathbb{R} \space | \space x \in (-6,\infty) \}\)

Range: \(\{y \in \mathbb{R} \space | \space y \in (5, -\infty) \}\)

The graph is continuous in the interval \(-6 \leqslant x < \infty\)

The zeros with each multiplicity are given as follows:

The factor theorem is used to define the functions, which states that the function is defined as a product of it's linear factors, if x = a is a root, then x - a is a linear factor of the function.

Considering the linear factors of the function in this problem, the zeros are given as follows:

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Answer:

IJ is going to be 5400.

Step-by-step explanation:

60*90= 5400.

90 is the right angle on J.

I is 60 degrees.

Answer:

Step-by-step explanation:

look for the stem and leafs that are less than 10 and add them all up

5+7+9

The monthly cell phone bill when shared data equals zero is given as follows:

$26.

The slope-intercept representation of a linear function is given by the equation presented as follows:

y = mx + b

The coefficients of the function and their meaning are described as follows:

The intercept of the line in this problem is given as follows:

b = 26.

Hence $26 is the monthly cell phone bill when shared data equals zero.

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Answer:

The answer to your problem is, D. The range is the best measure of variability, and it equals 32.

Step-by-step explanation:

We know the scores earned in a flower-growing competition are represented in the stem-and-leaf plot.

The key will equal 2|1 means 21

Which we conclude to 17, 19, 21, 25, 29, 30, 31, 32, 46, 49.

Quartile:

Median, Minimum, Maximum, & Range:

Thus the answer to your problem is, D. The range is the best measure of variability, and it equals 32.

Answer:

75

Step-by-step explanation:

78+64+74+92+67 = 375

375 / 5 = 75

The bag with 40 candies has 10 orange ones

bag with 60 pieces has 6 orange ones

The value of BC in triangle ABC is 23.

What is triangle?

A closed plane figure with three straight sides and three angles is known as a triangle. It is made by joining three non-collinear points. Triangles are important in geometry and have various types based on their sides and angles, such as equilateral, isosceles, scalene, acute, right, and obtuse triangles.

Given:- triangle ABC and DEF are similar.

So , AC = DF

Therefore,

4x-23 = 2x+2

4x – 2x = 2 + 23

2x = 25

x = 25/2 = 12.5

therefore, AC = 4x – 23

                        = 4 * 12.5 – 23

                        = 50 – 23

                       AC =27

So ,From triangle DEF

EF = 2x-2

    = 2*12.5 – 2

    = 25 – 2

  EF  = 23

As triangle ABC and DEF are similar.so,

BC = EF = 23

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Answer:

y = 4x + x is a linear equation

Step-by-step explanation:

A linear equation has the general equation as below;

\({ \bf{y = mx + k}}\)

k is a constant.

• For y = 4x + x

m is 5 and k is 0

\({ \underline{ \mathfrak{ \green{Good \: grace}} \: \:⚜ \: \: { \blue{ \mathfrak{Good \: God}}}}}\)

Answer:

rotation ,then reflection

The largest number of decimal places given in the data be 0.29385.

The middle number, that is determined by dividing the sum of all the numbers by the total number of numbers, is the average value in mathematics. When determining the average for a set of data, we add up all the values and divide this sum by the total number of values.

The average of a data set is known as the mean in mathematics. To find the mean, add all the numbers together, then divide the total by the total number of numbers.

Average = (0.277 + 0.279 + 0.281 + 0.281 + 0.282 + 0.284 + 0.288 + 0.288 + 0.290 + 0.296 + 0.296 + 0.297 + 0.298 + 0.299 + 0.302 + 0.303 + 0.306 + 0.308 + 0.310 + 0.312)/ 20

simplifying the above equation, we get

= 5.877/20

= 0.29385

Therefore, the largest number of decimal places given in the data be 0.29385.

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Answer:

2.52

Step-by-step explanation:

4.2 × 0.6

Multiply the terms.

= 2.52

Answer:

2.52

hope it helps

Step-by-step explanation:

4.2 x 0.6

To solve this first, you simply multiply 42*06

(Exclude the decimal point)

42 x 6

= 252

Now since there are two numbers after the point (one is 4.2 and one is 0.6)

Move 252 two decimal places to left

= 2.52

Answer:

Yes the samples can be drawn from a population with the same mean and standard deviation 10 hours

Step-by-step explanation:

We are given;

Sample mean for male employees; x1¯ = 63

Sample mean for female employees; x2¯ = 66

Sample size = 50

Standard deviation; σ = 10

First,let's define the hypotheses of the question;

Null hypothesis; H0: μ1 = μ2

Alternative hypothesis; Ha: μ1 ≠ μ2

Now, let's find the test statistic from the formula;

z = (x1¯ - x2¯)/(σ√(2/n))

Thus;

z = (63 - 66)/(10√(2/50))

z = -3/2 = - 1.5

Now, we are not given the significance value but usually when it is not given, we can adopt α = 0.05.

Thus, from online p-value from z-score calculator using; z = -1.5; α = 0.05; two tailed test; we have;

p-value = 0.13364

The p-value is greater than the significance value and thus we will fial to reject the null hypothesis and conclude that these samples can be drawn from a population with the same mean and standard deviation

Answer:

y = -2/3 x - 1

Step-by-step explanation:

y = mx + b

y = -2/3 x + b

-5 = -2/3 × 6 + b

-5 = -4 + b

b = -1

y = -2/3 x - 1

Answer:

(f o h)(-3) = -1

Step-by-step explanation:

(f o h)(x) = -2(-x - 3) - 1

(f o h)(x) = 2x + 6 - 1

(f o h)(x) = 2x + 5

(f o h)(-3) = 2(-3) + 5

(f o h)(-3) = -6 + 5

(f o h)(-3) = -1

Answer:

  1154

Step-by-step explanation:

Perhaps the easiest way to evaluate this numerical expression is to let a calculator do it. Alternatively, we can compute the value from a +1/a.

__

Consider the square of a +1/a:

  (a +1/a)^2 = a^2 +2(a)(1/a) +1/a^2 = (a^2 +1/a^2) +2

This means ...

  a^2 +1/a^2 = (a +1/a)^2 -2

Similarly, using a^2 for 'a' in the above, we have ...

  a^4 +1/a^4 = (a^2 +1/a^2)^2 -2

The value of a +1/a is ...

  \(a+\dfrac{1}{a}=3-2\sqrt{2}+\dfrac{1}{3-2\sqrt{2}}=(3-2\sqrt{2})+\dfrac{3+2\sqrt{2}}{3^2-(2\sqrt{2})^2}\\\\=(3-2\sqrt{2})+(3+2\sqrt{2})\\\\a+\dfrac{1}{a}=6\)

Then the value of a^2 +1/a^2 is 6^2 -2 = 34

and the value of a^4 +1/a^4 is 34^2 -2 = 1154

Answer:

Based on the diagram, we can see that the triangle formed by the line segment with length 8 and the two dashed line segments is a right triangle with a 45° angle. This means that the other two angles of the triangle are also 45° each.

Using the properties of 45°-45°-90° triangles, we know that the length of the hypotenuse is equal to the length of either leg times the square root of 2. Therefore, we have:

x = 8 / sqrt(2) = 8 * sqrt(2) / 2 = 4 * sqrt(2)

So the value of x is option B: 8√2 / 2 or simplified, 4√2.

The number 842 is the number whose digit 4 is ten times larger than in the number 384

To solve the problem, we need to find a number in which the digit 4 is ten times larger than in the number 384.

In the number 384, the digit 4 is in the ones place, which means that its value is 4.

To find a number in which the digit 4 is ten times larger, we need to find a number in which the digit 4 is in the tens place and its value is 10 times larger than 4, which is 40.

The only answer option that fits this description is 842. In this number, the digit 4 is in the tens place and its value is 40, which is ten times larger than its value in the number 384.

Therefore, the correct answer is 842.

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\(5.5b\leq 10.89\)

Divide both sides by 5.5:

\(\dfrac{5.5b}{5.5} \leq \dfrac{10.89}{5.5}\)

Answer:

\(b\leq 1.98\)

Answer:

b ≤ 1.98

Step-by-step explanation:

Given equation,

→ 5.5b ≤ 10.89

Now the value of b will be,

→ 5.5b ≤ 10.89

→ b ≤ 10.89 ÷ 5.5

→ [ b ≤ 1.98 ]

Hence, value of b is 1.98.

Answer:

The median increased more

Step-by-step explanation:

Given that:

Scores on last 15 :

72, 80, 75, 84, 78, 72, 75, 68, 81, 74, 79, 70, 77, 83, 72

Obtaining the range, mean, median and mode from the data above :

Rearranged data:

68, 70, 72, 72, 72, 74, 75, 75, 77, 78, 79, 80, 81, 83, 84

Range = 84 - 64 = 16

Mode = 72 - frequency of 3)

Mean = ΣX / n where n = sample size

Mean = 1140 / 15 = 76

Median = 0.5(n+1)th term = 0.5(16)th term =

8th term = 75

A score of 80 on each of next 3 rounds :

72, 80, 75, 84, 78, 72, 75, 68, 81, 74, 79, 70, 77, 83, 72, 80, 80, 80

Rearranged data:

68, 70, 72, 72, 72, 74, 75, 75, 77, 78, 79, 80, 80, 80, 80, 81, 83, 84

Range = 84 - 68 = 16

Mean = ΣX / n where n = sample size

Mean = 1380 / 18 = 76.67

Median =0.5(n+1)th term = 0.5(19)th term =

9.5 = (9th term +. 10th term) / 2 = (77 +78) / 2 = 77.5

Answer:

Conditional: If I have an 85%, then I get a B.     True

Converse: If I get a B, then I have an 85%.     False; 84% is also a B

So the biconditional statement is false because only the condtional is true.