Can somebody solve this for me?

Thanks

Answer:

13

Step-by-step explanation:

Given g(x)=-2x+5, find g(-4)

so you are substituting in -4 for x:

g(-4) = -2(-4) + 5

g(-4) = 8 + 5

g(-4) = 13

A piecewise function of the graph is a function y=f(x) which has different definitions in different intervals of x. A piecewise function's graph is divided into sections that each correspond to one of its definitions.

What is a piecewise function?

A function with many parts of curves in its graph is said to be piecewise. It implies that based on the value of the input, it has many definitions. In other words, a piecewise function responds differently to various inputs.

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For given 30 60 90 triangle, the values of the hypotenuse = 4 units and short side = 2 units

We know that, a 30 60 90 triangle is right triangle.

In right triangle the longest side is hypotenuse.

Here, hypotenuse = 4 units

The short side of triangle is the opposite to the side of smallest angle.

So, we need to find the length of the side opposite to angle 30.

Consider sin(30) = short side/hypotenuse

1/2 = short side/4

short side = 4/2

short side = 2 units

Therefore, for given 30 60 90 triangle, the values of the hypotenuse = 4 units and short side = 2 units

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Answer: it’s the square root of 10

Step-by-step explanation: I took this test

Answer:[tex]\sqrt{74}[/tex]

Step-by-step explanation:

An equation is formed from two equal expressions. Carmen earns $390 for her 13 hours of tutoring.

Equation: An equation is created by equating two equations with an equal sign '='.

Let's say Carmen is earning $30 per hour of her tutoring her.

Therefore, the formula for Carmen's income after H hours of tutoring can be written as:

Income = hourly wage for individual instruction x number of hours

I = 30 × H

I = 30H

After 13 hours of tutoring, Carmen's income will be:

I = 30 (13)

I = 390

So, after 13 hours of tutoring, Carmen's income will be $390.

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Answer:32

Step-by-step explanation:

You plug in 5 for H and then you solve

Answer:

the answer to yo question is 4

Step-by-step explanation:

The rate of change from 2015 to 2017 is -$250

The amount he spend for lunch in 2015 = $800

The amount he spend for lunch in 2017 = $300

Therefore the total change = The amount he spend for lunch in 2017 - The amount he spend for lunch in 2015

Substitute the values in the equation

= 300 - 800

= -500

The total years from 2015 to 2017 = 2 years

The rate of change from 2015 to 2017 = The total change / The total years from 2015 to 2017

= -500 / 2

= -$250

Hence, the rate of change from 2015 to 2017 is -$250

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The equation of the line shown in this graph passing through the points (-2, 2) and (-2, -3) is x = -2

The standard equation of a line graph is expressed as [tex]y=mx+c[/tex]

m is the slope of the line

c is the y-intercept

Given: coordinate points  (-2, 2) and (-2, -3)

The coordinates are in the form of (x₁,y₁) and (x₂,y₂)

Slope of the equation is [tex](\frac{y2-y1}{x2-x1})[/tex]

So ,slope=[tex](\frac{-3-2}{-2+2})[/tex]

               =[tex](\frac{-5}{0})[/tex]

               =∝

Since the slope of infinity, this shows that the line is a vertical line. The standard equation of a vertical line is x = a

Since the x-coordinates are similar, hence a = -2

The equation of the line shown in this graph passing through the points (-2, 2) and (-2, -3) is x = -2

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Cindy's graph is a reflection of Brad's graph across the x - axis.

What is transformations of graph?

The technique of altering an existing graph or graphed equation to create a different version of the following graph is known as graph transformation. In particular, the change of algebraic equations, it is a typical kind of algebraic problem.

Given:

Brad graphs the function y = |x-2|

Cindy graphs the function y=-|x-2|

If f(x) = |x - 2| and f(x) = - |x - 2|

Since, if the transformation of the graph is f(x) changes to -f(x) then there is reflection over x - axis.

Here y changes to -y.

Therefore, Cindy's graph is a reflection of Brad's graph across the x-axis.

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Answer:

No

Step-by-step explanation:

You can't simplify this equation any further because the bases (a, b) aren't the same.

For example:

You can simplify a^2/a^8 to be 1/a^6

Steps:

a^8=(a^2*a^6)

a^2/a^2*a^6

a^2 ÷ a^2=1

1/a^6

(You can only break the exponent up and divide the quotient if the base is the same!)

=========================================================

Explanation:

Let's find the slope of the line through the given points.

[tex](x_1,y_1) = (11,13) \text{ and } (x_2,y_2) = (14,19)\\\\m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\m = \frac{19 - 13}{14 - 11}\\\\m = \frac{6}{3}\\\\m = 2\\\\[/tex]

The slope is 2.

Now apply point-slope form and solve for y as shown in the steps below.

[tex]y - y_1 = m(x - x_1)\\\\y - 13 = 2(x - 11)\\\\y - 13 = 2x + 2*(-11)\\\\y - 13 = 2x - 22\\\\y = 2x - 22 + 13\\\\y = 2x - 9\\\\[/tex]

The answer is y = 2x - 9

It's of the form y = mx+b

----------------------------------------

Check:

Let's plug in x = 11.

We should get y = 13 as a result because of the point (11,13)

So,

y = 2x-9

y = 2*11-9

y = 22 - 9

y = 13

This confirms y = 2x-9 goes through (11,13)

Follow similar steps to show that x = 14 leads to y = 19.

I'll let you do this part.

Total time for whole journey can be calculated by adding the three parts of the journey which would give answer as 2.5 hours.

What is a fraction?

The components of an entire or group of items are represented by fractions. A fraction consists of two components. The numerator is that the figure at the top of the line. It details the amount of equal portions that were taken from the total or collection. The denominator is that the figure that appears below the line.

Main Body:

total time = 20 minutes + 40 minutes + 1 hour 30 minutes

                = 2.5 hours or 5/2 hours.

Hence total time for journey is 2.5 hours.

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By using the properties of domain and range, it can be inferred that

Domain of the function h(x) = -2|x| is the set of all real numbers

Range of the given function h(x) = -2|x| is the set of all negative real numbers

What is a function?

A function from A to B is a rule that assigns to each element of A a unique element of B. A is called the domain of the function and B is called the codomain of the function.

There are different operations on functions like addition, subtraction, multiplication, division and composition of functions.

Here,

h(x) = -2|x|
h(x) is defined for all x ∈ R

Domain of the given function is the set of all real numbers

For range

we know,

[tex]|x| > 0\\-2|x| < 0\\h(x) < 0[/tex]for all x ∈ R

Range of the given function is the set of all negative real numbers

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Answer: The answer is b

Step-by-step explanation:    Please give me thanks and 5 star  

              Have Great Day   :)

For option, A point estimate p is = 5/800 = 0.00625

For option B 23860 large sample must be required to estimate p within 0.1% at 95% level of confidence.

Margin of Error = 0.1% = 0.001

The critical Z value for a 95% confidence level is 1.96

Required sample size, n = (z / E)² * p(1-p)

= (1.96 / 0.001)² * 0.00625 * (1 - 0.00625)

= 23860       (Rounding to the nearest integer)

Point estimate of difference in means = 89.5 - 55.9 = 33.6

The standard error (SE) of the sampling distribution of the difference in means is

SE = √{ (s_1²/n1) + (s_2²/n2) }

= { √(16.8²/78) + (8.2²/117) }

= 2.047721

Degree of freedom = min(n1 - 1, n2 -1) = min(78-1, 117-1) = 77

The critical value of t at df = 77 and the 99% confidence interval is  2.64

99% confidence interval of the difference in means is,

(33.6 - 2.64 * 2.047721 , 33.6 + 2.64 * 2.047721)

(28.19, 39.01)

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Answer: The answer is -2

Answer:

I think it's B

Step-by-step explanation:

Because the pattern starts at 7 then plus 3 etc...

The percentage decrease in Lora's screen time on phone is 25% this week.

Percentage related problems work around a certain reference value. This reference value is what the output percentage refers to when showing any growth or decay in the other value.

For this problem, last week's screen time is that reference value i.e. 920 minutes per week.

Now, current week's usage is 690 minutes per week. For calculating percentage decrease, we first find our the difference (in minutes).

[tex]Decrease=S_{1}- S_{2}=920-690=230[/tex]

Now, for its percentage we compare this value to our reference value i.e. last week's screen time. This will tell us about the decrease in screen time with reference to last week. This is what percentage does i.e. compares two sets of data.

[tex]Decrease=\frac{difference}{S_{1}}*100= \frac{230}{920}*100[/tex]

[tex]Decrease=25[/tex]%

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Answer:25

Step-by-step explanation:

The level of marginal significance inside a statistical hypothesis test, or P-value, represents the likelihood that a particular event will occur.

P-value;

The likelihood of getting a result that is equivalent to or more extreme than what was actually seen, under the null hypothesis, is what is meant by the term "P value." The probability (P) indicator indicates the likelihood that any observed variation between groups is the result of chance.

Here,

The statistical test's extremely low p-value indicates that the null hypothesis must be accepted, and the conclusion that Gilbert is guilty is based on the fact that Gilbert's existence is dependent on the shift deaths.

Relevance of p-value to the trial;

The p-value evaluates the agreement between the trial's actual outcomes and the "pure chance" explanation for them. When the only differences between groups A and C are the result of chance, a p-value of 0.002 favoring group A very extremely seldom occurs.

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The greatest number of cups of yogurt that Monica can buy is 14 cups

The amount that she has = $20

The cost of one gallon of milk = $2.50

The cost of one cup of yogurt = $1.20

Consider the number of cups of yogurt = x

Then the inequality will be

1.20x + 2 .50 ≤ 20

Solve the inequality and find the value of x

Subtract 2.50 from both side of the inequality

1.20 + 2.50 - 2.50 ≤ 20 - 2.50

1.20x ≤ 17.5

Divide both side of the equation by 1.20

1.20x / 1.20 ≤ 17.5 / 1.20

x ≤ 17.5 / 1.20

x ≤ 14.58

Hence, the greatest number of cups of yogurt that Monica can buy is 14 cups

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The measure of the angle ∠Z is 38°.

We are given two triangles. The vertices of the first triangle are E, F, and G. The vertices of the second triangle are Y, X, and Z. The angle ∠F is congruent to the angle ∠X. The angle ∠E is congruent to the angle ∠Y. The measures of the angles ∠E and ∠X are 62° and 80°, respectively. We need to find the measure of the angle ∠Z. The measure of the angle ∠Y must be equal to the measure of the angle ∠E.

∠Y = ∠E = 62°

Now, in the triangle ΔYXZ, we will use the angle sum property. The sum of all the angles in a triangle is equal to 180°.

∠Y + ∠X + ∠Z = 180°

62° + 80° + ∠Z = 180°

∠Z = 180° - (62° + 80°) = 180° - 142° = 38°

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The length of segment QC, using the Pythagorean Theorem, is of:

QC = 45 cm.

The Pythagorean Theorem relates the length of the legs [tex]l_1[/tex] and [tex]l_2[/tex] of a right triangle with the length of the hypotenuse h, stating that the length of the hypotenuse is obtained according to the equation presented as follows

[tex]h^2 = l_1^2 + l_2^2[/tex]

The length of QC is obtained considering that QC is a leg of a right triangle in which:

The perpendicular bisector theorem states that if a point is on the perpendicular bisector of a segment, then it is equidistant from the segment's endpoints, thus the length of segment QB is given as follows:

QB = QD = 51 cm.

B is the midpoint of AC, hence the length of segment BC is given as follows:

BC = 0.5 x AC = 0.5 x 48 = 24 cm.

Hence the length of QC is obtained as follows:

QC² + 24² = 51²

QC = sqrt(51² - 24²)

QC = 45 cm.

The diagram is given by the image shown at the end of the answer.

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Answer:

Step-by-step explanation:

3/4  + 6/10

= 15/20 + 12/20

=  27/20

Answer:

15a

Step-by-step explanation:

6a+9a

We just add the coefficients together since they share the same variable

6+9=15

15a

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Answer: the answer you chose was correct x+y <1000

                                                                       x=<75

Step-by-step explanation:

first they are selling 3 dollar and 4 doallar items to get above 1000 dollars

then they sayed at least 75 bags of hot chips so it has to be 75 or higher

The mean and standard deviation of the length y of a randomly chosen cricket from the field is 3.048 and 0.635 respectively.

A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean.

Given that, the length in inches of a cricket chosen at random from a field is a random variable x with mean 1.2 inches and standard deviation 0.25 inches.

μx = 1.2

σx = 0.25

2.54 cm = 1 in (given)

Y = 2.54x

Formula for mean and standard deviation =

μax+b = aμx + b

σax+b = aσx

Then Y = 2.54x we get,

μy = μ2.54x =  2.54μx = 2.54(1.2) = 3.048

σy = σ2.54x = 2.54σx = 2.54(0.25) = 0.635

Hence, The mean and standard deviation of the length y of a randomly chosen cricket from the field is 3.048 and 0.635 respectively.

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Answer:

the two middle students are 63