Please help me with Algebra 2 questions (2).
#8: Simplify the expressions. Assume all variables are positive.
#11: Solve the equation.

Answer:

Point-slope form of equation given as [tex]$y-2=-2(x+2)$[/tex].

Slope-intercept form of equation is given as [tex]$y=-2 x-2$[/tex].

Step-by-step explanation:

In the question, it is given that the slope of a line is -2 and it passes from (-2,2).

It is asked to write the point-slope form of the equation and rewrite it as slope-intercept form.

To do so, first find the values which are given in the question and put it in the formula of point-slope form. Simplify the equation to rewrite as slope-intercept form.

Step 1 of 2

Passing point of the line is (-2,2).

Hence, [tex]$x_{1}=-2$[/tex] and

[tex]$$y_{1}=2 \text {. }$$[/tex]

Also, the slope of the line is -2.

Hence, m=-2

Substitute the above values in point-slope form of equation given by [tex]$y-y_{1}=m\left(x-x_{1}\right)$[/tex]

[tex]$$\begin{aligned}&y-y_{1}=m\left(x-x_{1}\right) \\&y-2=-2(x-(-2) \\&y-2=-2(x+2)\end{aligned}$$[/tex]

Hence, point-slope form of equation given as y-2=-2(x+2).

Step 2 of 2

Solve y-2=-2(x+2) to write it as slope-intercept form given by y=mx+c.

[tex]$$\begin{aligned}&y-2=-2(x+2) \\&y-2=-2 x-4 \\&y=-2 x-4+2 \\&y=-2 x-2\end{aligned}$$[/tex]

Hence, slope-intercept form of equation is given as y=-2x-2.

[tex] \frac{p {}^{2} + 1 - 3p }{4 - 3} = -1[/tex]

[tex]p {}^{2} - 3p + 1 = -1[/tex]

[tex]p {}^{2} - 3p +2 = 0[/tex]

[tex](p-2)(p - 1) = 0[/tex]

[tex]p = 2 \: \: \: \: \: p = 1[/tex]

The equations are both the same with a slope of 2 and y-intercept of 3.

A line is the distance between two points. Given the equations below;

2y - 4x = 6

y = 2x + 3

___________

y - 2x = 3

y = 2x + 3

The equations are both the same with a slope of 2 and y-intercept of 3. The graph of the equation is plotted below.

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The value of ? and X are 12 and 24 respectively

A triangles is 2D shape with three sides and angles.

From the given diagram, the ratio of similar sides is equal to a constant as shown;

15/20 = 9+15/20+x

Cross multiply

15/9+15 = 20/20+x

15/24 = 20/20+x

Comparing with the given ratio

? = 24

X = 20+x

Find x

15(20+x) = 480

300 + 15x = 480

15x = 180

x =12

Fro the given expression

x/32 = 9/?

12/32 = 9/?

12 ? = 32 * 9

? = 24

Hence the value of ?and x from the given diagram is 12 and 24 respectively

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Answer:

B- Jenny must have driven more than 48 miles.

Step-by-step explanation:

If Jenny rode for 60 at 48 mph, it would be exactly 48 miles. Though there is only 60 minutes in an hour, and Jenny rode 5 minutes longer than that, her drive being 65 minutes. To find how much she rode, 5 extra minutes into an hour would divide equally into 60, resulting in 12. Divide 48 by 12, and Jenny would have driven 4 miles in the 5 minutes drive after 60 minutes.

(Jenny basically driven 52 miles in 65 minutes).

Answer:

See below

Step-by-step explanation:

7 + 15 e^(1-3x) = 10        start by subtracting 7 from both sides

15  e^(1-3x) = 3               now divide both sides by 15

e ^(1-3x) = .2                   now take the ln  of both sides

1-3x = -1.6094379          subtract 1 from both sides

-3x = = 2.6094379         divide both sides by -3

x = .869813

The word expression the cube of the sum of a number and 3 can be written as (x + 3)³ or x³ + 9x² + 27x + 27.

It is defined as the combination of constants and variables with mathematical operators.

It is given that:

Let x be the number:

The word expression is:

The cube of the sum of a number and 3.

The sum of a number x and 3 is:

x + 3

The cube of the number (x + 3)

= (x + 3)³

After expanding the cube of (a + b)

(a + b)³ = a³ + 3a²b + 3ab² + b³

Similarly,

(x + 3)³ = x³ + 3x²(3) + 3(x)(3)² + (3)³

(x + 3)³ = x³ + 9x² + 27x + 27

Thus, the word expression the cube of the sum of a number and 3 can be written as (x + 3)³ or x³ + 9x² + 27x + 27.

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3) Vertical angles are congruent.

4) Corresponding angles tehorem

5) Transitive property of congruence

Answer: 74.52 if the question is how far she swims

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

on edge

Step-by-step explanation:

7×5×6×x

7×5×6×392

210×392

82320

The option (B) is correct. Associative property was applied to create the given expression.

Given expression is 7x+(5+6x) rightarrow (7x+5)+6x.

Firstly, check the given expression by commutative property.

The commutative property of addition is a+b=b+a and the commutative property of multiplication is a×b=b×a.

The commutative property didn't satisfy the given expression.

Now, check the given expression by associative property.

The associative property of addition is (a+b)+c=a+(b+c) and the commutative property of multiplication is (a×b)×c=a×(b×c).

The associative property of addition satisfy the given expression.

Further, check the given expression by distributive property.

The distributive property is a×(b+c)=ab+bc.

The distributive property didn't satisfy the given expression.

Hence, the given expression 7x+(5+6x) rightarrow (7x+5)+5x s created by the associative property.

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The trigonometric function gives the ratio of different sides of a right-angle triangle. The given problems can be solved as given below.

The trigonometric function gives the ratio of different sides of a right-angle triangle.

[tex]\rm Sin \theta=\dfrac{Perpendicular}{Hypotenuse}\\\\\\Cos \theta=\dfrac{Base}{Hypotenuse}\\\\\\Tan \theta=\dfrac{Perpendicular}{Base}\\\\\\Cosec \theta=\dfrac{Hypotenuse}{Perpendicular}\\\\\\Sec \theta=\dfrac{Hypotenuse}{Base}\\\\\\Cot \theta=\dfrac{Base}{Perpendicular}\\\\\\[/tex]

where perpendicular is the side of the triangle which is opposite to the angle, and the hypotenuse is the longest side of the triangle which is opposite to the 90° angle.

1st.) x = 5 /Sin(30°)

x = 10

!) sin(45°) = 4/x

x = 4/sin(45°)

x = 4√2

I) Cos(45°) = √3 / x

x = √3 / Cos(45°)

x = √6

E) Tan(60°) = 3√3 / x

x = 3√3 / 3

W) For isosceles right-triangle, the angle made by the legs and the hypotenuse is always 45°.

x = 45°

N) x² + x² = (7√2)²

x = 7

V) Tan(60°) = 7 / x

x = 7√3/3

K) x² + x² = (9)²

x = 9/√2

Y) Sin(60°) = 7√3/x

x = 14

M) Sin(30°) = x/11

x = 11/2

T) Sin(45°) = x/√10

x = √5

A) x + 2x + 90° = 180°

x = 30°

O) Sin(45°) = √2 / x

x = 2

R) Tan(30°) = x / 4

x = 4/√3 = 4√3 / 3

S) Sin(60°) = x / (10/3)

x = 5√3 / 3

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The logarithm of 10 to base 10 is 1

The given parameters are:

So, the logarithm expression can be represented as:

[tex]\log_{10}10[/tex]

The law of logarithm states that:

[tex]\log_{x}x = 1[/tex]

The above means that;

When the base and the number are the same, the logarithm is 1

So, we have:

[tex]\log_{10}10 = 1[/tex]

Hence, the logarithmic value is 1

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To convert an integer to a fraction you must choose an expression that does not alter the numerical value. You can do this with multiples of the number, for example, for 100:

100/1 = 200/2 = 300/3 = 400/4 = 100

Another example, for 500:

500 = 500/1 = 1000/2 = 1500/3 = 2000/4

Answer:

Step-by-step explanation:I actually depends on what your solving like if you are solving a question is says solving 16 times a random fraction, you just simply add one under 16. And it will make it 16/1

here is your answer

The test statistic for this procedure is using two sample T-test is 0.458.

Definition of Two Sample T-test

A variation of the Student's t-test used to determine if two sample means are substantially different is known as the two sample T-test (also known as Welch's t-test, Welch's adjusted T, or unequal variances t-test). The test's degrees of freedom have been changed, which generally boosts the test's power for samples with unequal variance.

T-Test Statistic for The Procedure

It is given that mean of the differences = 1.33

And, the standard deviation of the differences, standard error = 2.90

The test static formula is given as,

t = (estimate - hypothized value) / standard error

Here,  t is the t- test statistic, and estimate is the mean of the differences.

Since it is given that all conditions are met, the hypothized value can be taken as 0

Substituting substituting estimate = 1.33 and standard error = 2.90 in the t-test statistic formula, we get,

t = (1.33-0)/2.90

or t = 0.458

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The function is assigning to each element of one set exactly one element from the other set.

First table represent a function.

Second table not represent a function (for -1 are four different numbers).

Third table represent a function.

Fourth table not represent a function (for -6 are two differen numbers 5 and 9)

The total packages the driver delivered is  805.

The total number of books in the local library is  14,260.

Percentage can be described as a fraction out of an amount that is usually expressed as a number out of hundred.

Total packages delivered = total number of internet orders / percentage of internet orders

644 / 80%

644 / 0.8 = 805

Total number of books = total number of fiction books / percentage of fiction books

8556 / 60%

8556 / 0.6 = 14,260

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Answer:

Hence the expression [tex]$$(3rs-7)(3rs-4)=9r^2s^2-33rs+28$$[/tex]

Step-by-step explanation:

Explanation

[tex]$$\begin{matrix}{} & {} & {} & {} & 3rs & - & 7 \\ \times & {} & {} & {} & 3rs & - & 4 \\ \end{matrix}$$[/tex]

_________________

[tex]$$\begin{matrix}{} & {} & {} & - & 12rs & + & 28 \\ {} & {} & 9{{r}^2}{{s}^2} & - & 21rs & {} & {} \\ \end{matrix}$$[/tex]

________________

[tex]$$\begin{matrix}{} & {} & 9{{r}^2}{{s}^2} & - & 33rs & + & 28 \\ \end{matrix}$$[/tex]

Using the circle theorems, we have proven that m ∠RTW = 15°

From the question, we are to prove that m ∠RTW = 15°

In the given diagram,

measure of arc ST = 30°

∴ m ∠SRT = 30°

m ∠SRT = ∠T + ∠W ( Exterior angle of a triangle equals the sum of the two remote angles)

Also,

∠T = ∠W (Radii of the same circle)

∴ m ∠SRT = ∠T + ∠T

m ∠SRT = 2 × ∠T

30° = 2 × ∠T

∠T = 30° /2

∠T = 15°

∴ m ∠RTW = 15°  

Hence, we have proven that m ∠RTW = 15°

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Answer:

Greg will walk 1 mile in 30 minutes, or 2 miles per hour.

Explanation:

Multiply the ratio of miles to minutes:

1/3 mi   :   10 min

1 mi      :    30 min

2 mi     :    1 hr

Answer: 81/100



Step-by-step explanation:

I don't guarantee you I am right but..

first, solve for the exponents after substituting the numbers in

3/5 x 3/5 is 9/25

since b's exponent is negative, you change the fraction into its reciprocal and then do it with the exponent but positive

2/3^-3 to 3/2^3 and 3/2 x 3/2 is 9/4

then you mutiply both numbers to get 9/4 x 9/25 is 81/100

Answer:

(1,3)

Step-by-step explanation:

since they are open circles they will not have brackets instead they will have parentheses.

one answer for this number line (graph) is (1,3)

Answer:

6 1/4

Step-by-step explanation:

ad 2 and 3 get 5 ad 3 and 2 get five now u have 5/4 uh oh the 4 is full

take 1 from the 5 over 4 and turn that one into 6 and turn the 4/4 to 1/4

boom 6 1/4

The  dimensions of the microwave cup-of-soup package are:

Radius = 3.39cm, and Height = 9.27cm.

Computed using differentiation.

The microwave cup-of-soup package is in the shape of a cylinder.

Thus, its volume can be shown as, V = πr²h, where r is its radius in cm and h is its height in cm.

The volume is given to be 450 cm³.

Thus, we can say that,

πr²h = 450,

or, h = 450/(πr²) ... (i).

The cost of the microwaveable cup-of-soup package is given as:

The bottom is made of styrofoam at 0.03 cents/cm².

The area of the bottom = πr².

Therefore, the cost of the bottom = πr²(0.03) cents.

The side is made of styrofoam at the rate of 0.03 cents/cm².

The area of the side = 2πrh = 2πr{450/(πr²)}. {Taking h = 450/(πr²) from (i)}.

Therefore, the cost of the side = 2πr{450/(πr²)}(0.03) cents.

The top is made of glued paper at the rate of 0.08 cents/cm².

The area of the top = πr².

Therefore, the cost of the top = πr²(0.08) cents.

Therefore the total production cost function can be written as:

C = πr²(0.03) + 2πr{450/(πr²)}(0.03) + πr²(0.08) cents,

or, C = 0.03πr² + 0.08πr² + 27/r cents,

or, C = 0.11πr² + 27/r cents ... (ii).

We are asked to minimize the cost function.

To minimize it, we follow these steps:

Differentiating both sides in (ii) with respect to the radius,

dC/dr = 0.22πr - 27/r² ... (iii).

To get the points of inflections, we equate this to zero, to get,

dC/dr = 0.22πr - 27/r² = 0,

or, 0.22πr - 27/r² = 0,

or, 0.22πr = 27/r²,

or, r³ = 27/0.22π,

or, r = ∛(27/0.22π) = 3.393 cm.

To check whether the cost C, is minimum or maximum at the point, we calculate the second order differential, and if it's greater than 0, then we get a minimum and vice-versa.

Thus, differentiating both sides of (iii), with respect to the radius r, we get:

d²C/dr² = 0.22π + 54/r³.

0.22π + 54/r³ is greater than 0, for all values of r, since r is always greater than 0 {radius of an object cannot be negative}.

Thus, the radius at which the cost is minimized is 3.393 cm.

The corresponding height will be 450/(πr²) = 9.274 cm.

Thus, the dimensions of the microwave cup-of-soup package are:

Radius = 3.39cm, and Height = 9.27cm.

Computed using differentiation.

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Answer:

28

Step-by-step explanation:

Simple solution:

Each one was 5 years younger 5 years ago, so subtract 5 from 38 for each one.

38 - 5 - 5 = 28

The sum of their ages was 28.

Algebra solution:

Kate is x years old now.

Gift is y years old now.

The sum of their ages now is x + y.

The sum of their ages is 38, so x + y = 38.

5 years ago:

Kate was x - 5 years old.

Gift was y - 5 years old.

The sum of their ages 5 years ago was x - 5 + y - 5 = x + y - 10.

Substitute 38 for x + y.

The sum of their ages was 38 - 10 = 28

Answer:

210° , 330°

Step-by-step explanation:

using the sides of the 30- 60- 90 triangle

with legs 1, [tex]\sqrt{3}[/tex] and hypotenuse 2 , then

[tex]sin^{-1}[/tex] [tex]\frac{1}{2}[/tex] = 30° ← related acute angle

since [tex]sin^{-1}[/tex] - [tex]\frac{1}{2}[/tex]

then angle is in third / fourth quadrants , then required angles are

180° + 30° = 210° ← in third quadrant

360° - 30° = 330° ← in fourth quadrant