Paul is training for a bike race and is attempting to improve his average speed. With his old trainer, Paul averaged a pace of 20 MPH. With his new trainer, he rode at an average speed of 27 MPH. By what percent did his average speed increase?

Answer:

B is the answer

Step-by-step explanation:

the rulers at store a cost much

Answer:

[tex]86.5=2l+2(2l-40.75)\\86.5=2l+4l-81.5\\6l=86.5+81.5\\6l=168\\l=28[/tex]

l=28

Answer:

[tex]x\geq-1.\overline{756}[/tex]

Step-by-step explanation:

[tex]1 2 (8x -4) -23 (9x + 6)\leq 9\\\\96x-48-207x-138\leq9\\\\(96-207)x+(-48-138)\leq9\\\\-111x-186\leq9\\\\-111x\leq9+186\\\\-111x\leq195\\\\111x\geq-195\\\\x\geq\frac{-195}{111}\\\\x\geq-\frac{65}{37}\\\\x\geq-1.\overline{756}[/tex]

Answer:

2nd answer. (16,32,48,64,80)

Step-by-step explanation:

Answer:

B.

Step-by-step explanation:

-6<x<6

Answer:

The point-slope form of the line is y - 3 = -2(x + 2)

Step-by-step explanation:

The point-slope form of the equation of a line is

y - y1 = m(x - x1), where

The rule of the slope is [tex]m=\frac{y2-y1}{x2-x1}[/tex] , where

Let us use these rules to solve the question

∵ (-2, 3) and (0, -1) are two points on the line

∴ x1 = -2 and y1 = 3

∴ x2 = 0 and y2 = -1

→ Substitute them in the rule of the slope to find it

∵ m = [tex]\frac{-1-3}{0--2}=\frac{-4}{0+2}=\frac{-4}{2}=-2[/tex]

∴ m = -2

→ Substitute the value of m and point (-2, 3) in the form of the

   equation above

∵ m = -2 and (x1, y1) = (-2, 3)

∴ y - 3 = -2(x - -2)

→ Remember (-)(-) = (+)

∴ y - 3 = -2(x + 2)

∴ The point-slope form of the line is y - 3 = -2(x + 2)

Answer:

Step-by-step explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 14.3 g

volume = 3.2 cm³

We have

[tex]density = \frac{14.3}{3.2} \\ = 4.46875[/tex]

We have the final answer as

Hope this helps you

Answer:

The answer is 4.47 g/cm³

Step-by-step explanation:

1:  0.7142857143

2:  0.04761904762

3:  0.2142857143

4:  0.8666666667

5:  0.2727272727

6: 0.3888888889

7:  0.3333333333

8:  0.4444444444

9:  0.3333333333

10:  0.3571428571

11:    0.36

12:  0.8

13:  0.2307692308

14:  0.875

15:  0.8

16:  0.04761904762

Answer:

Amanda has 20, Rob has 45

Step-by-step explanation:

Amanda has ten fewer rocks than Andrew, 30-10=20

Rob has 15 more rocks than Andrew, 30+15=45

Answer:

Vertical Angles!

Step-by-step explanation:

Very simple!

Vertical angles are a pair of angles that are equal in degree measure.

Essentially, they are equal to each other. Nothing more to it.

This means that [tex]29=2x+3[/tex]!

I presume you have done math before, so this solves to be: [tex]x=13[/tex]

(I don't have a degree sign, but it should be there in your answer.)

Hope this helps!

P.S. How's life?

Answer:

tan(13)-tan(2)

Step-by-step explanation:

= Monthsarry namin ng bebe ko

Answer:

x=2

y= -4/3

y=2/3

x=-4

Step-by-step explanation:

4x-6(0)=8

4x-0=8

4x=8

x=2

4(0)-6y=8

0-6y=8

-6y=8

y=-4/3

4(3)-6y=8

12-6y=8

-6y=-4

y=2/3

4x-6(-4)=8

4x+24=8

4x=-16

x=-4

Answer:

x=5

Step-by-step explanation:

k(x)=6x–12

18=6x–12

18+12=6x

30=6x

30/6=6x/6

x=5

i think it is clear answer.

Answer:

Figure of the function is included below as attachment.

Step-by-step explanation:

Let [tex]y = \cos x[/tex]As first step we have to find x intercepts, maxima and minima from 0 to 2π, which are needed to plot given function. Cosine is a trigonometric function bounded between -1 and 1 with a periodicity of 2π.

x-Intercepts

x-intercepts are those points of the function such that [tex]y = 0[/tex]. That is:

[tex]\cos x = 0[/tex]

In this case, there is a periodicity of π for [tex]y = 0[/tex]. The x-intercepts are in the following set:

[tex]S = \{\forall\,x\in\mathbb{R}|x=0.5\pi\pm\pi\cdot i,i\in\mathbb{N}_{O} \}[/tex]

Maxima

Maxima are those points of the function such that [tex]y = 1[/tex]. That is:

[tex]\cos x = 1[/tex]

In this case, there is a periodicity of 2π for [tex]y = 1[/tex]. Maxima are in the following set:

[tex]S = \{\forall\,x\in\mathbb{R}|x=0\pm2\pi\cdot i,i\in\mathbb{N}_{O} \}[/tex]

Minima

Minima are those points of the function such that [tex]y = -1[/tex]. That is:

[tex]\cos x = -1[/tex]

In this case, there is a periodicity of 2π for [tex]y = -1[/tex]. Minima are in the following set:

[tex]S = \{\forall\,x\in\mathbb{R}|x=\pi\pm2\pi\cdot i,i\in\mathbb{N}_{O} \}[/tex]

Lastly, we proceed to plot the function as well as its x-intercepts, maxima and minima with the help of a plotting tool.

Answer:

This is how you simplify them

Step-by-step explanation:

1) 1/90

2) 1/2

3) 7/20

Answer:

6p

Step-by-step explanation:

Answer: 6p

Explanation: The word "product" is a

keyword that tells us to use multiplication.

So your answer can be written as 6 · p or just 6p.

Don't write your answer as p6.

Even though it's technically correct, I would always put

the number before the variable as a matter of form.

Answer:

The answer is [tex](x-9) (x-3)[/tex].

Step-by-step explanation:

This is because when you multiply them together you get

[tex]x^{2}[/tex], [tex]-9x[/tex], [tex]-3x[/tex], and [tex]27[/tex]

When you add the like terms you get,

[tex]x^{2} - 12x +27[/tex]

Answer:

b

Step-by-step explanation:

Answer:

B. 22 feet.

Step-by-step explanation:

The width is adding 2 feet for every time the length is adding 8 feet. So, 88+8=96, and 20+2=22.

Answer:

See Below

Step-by-step explanation:

We are given 3 equations.

3x + 8

5x - 20

and

5x + 4y

First lets solve for x using the first two

3x + 8 = 5x -20

Move the variables to one side

3x + 8 = 5x -20

-3x        -3x

8 = 2x -20

+20     +20

28 =2x

28/2 =2x /2

14 = x

Now we have x = 14

Lets plug this into the second equation to solve for the angle

3(14) + 8

42 + 8 = 50

5(14) - 20

70 - 20 =50

Now, lets plug the x and the angle into the third equation to find y

5 (14) +4y = 50

70 + 4y = 50

-70           -70

4y = -20

4y/4 = -20/4

y = -5

So now we have:

x = 14

y = -5

and the angle = 50

Hope this helps!

Answer:

The mass of the substance is  [tex]\mathit{8\cdot 10^{3}}[/tex] grams.

Step-by-step explanation:

Scientific Notation

The mass of a substance is [tex]8\cdot 10^9[/tex] micrograms and one microgram is 0.000001 grams.

This last unit needs to be expressed in scientific notation:

[tex]0.000001 grams = 1\cdot 10^{-6}[/tex]

The mass of the substance in grams is calculated by:

[tex]8\cdot 10^9 * 1\cdot 10^{-6}[/tex]

Multiply the magnitudes and add the exponents:

[tex]8\cdot 10^9 * 1\cdot 10^{-6}=8\cdot 10^{-6+9}=8\cdot 10^{3}[/tex]

The mass of the substance is [tex]\mathbf{8\cdot 10^{3}}[/tex] grams.

Answer:

x = 30

Step-by-step explanation:

15 = 1/2x

multiply both sides of equation by 2

30 = x

Answer:

(0, -5)

Step-by-step explanation:

For Y-intercept: put X = 0

5x-3y=15

-3y=15-5x

3y=-15+5x

y=-5+5/3x

y=5/3x-5

Answer:

[tex]\frac{5}{2}[/tex] improper fraction or [tex]2\frac{1}{2}[/tex] mixed number

Step-by-step explanation:

To find the answer you would need to do [tex]\frac{5}{8}[/tex] divided by [tex]\frac{1}{4}[/tex]

Hope this helps!

The division of the fraction numbers 5/8 and 1/4 in the decimal form will be 2.5.

Algebra is the study of algebraic expressions, while logic is the manipulation of those concepts.

The acronym PEMDAS stands for Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to answer the problem correctly and precisely.

The numbers are given below.

5/8 and 1/4

Then the division of the numbers 5/8 and 1/4 will be given by putting a division sign between them. Then we have

⇒ (5/8) ÷ (1/4)

⇒ (5/8) x (4)

⇒ 5/2

⇒ 2.5

The division of the fraction numbers 5/8 and 1/4 in the decimal form will be 2.5.

More about the Algebra link is given below.

https://brainly.com/question/953809

#SPJ2

Answer:

21

Step-by-step explanation:

just took the test

Answer

I believe D or C

Step-by-step explanation:

A function is a relation for which each value from the set the first components of the ordered pairs is associated with exactly one value from the set of second components of the ordered pair.

Answer:

The probability that an individual has this disease given that the test indicates its presence is 0.1

Step-by-step explanation:

Let A be the event which indicates Having disease

Let B be the event in which test indicates that disease presence

Now we are given that 10% of the individuals in this age group suffer from this form of arthritis

So, P(A)=0.1

We are also given that the proposed test was given to individuals with confirmed arthritics disease, and a correct test result was obtained in 85% of the cases.

P(B|A)=0.85

Now we are given that. When the test was administered to individuals of the same age group who were known to be free of the disease, 4% were reported to have the disease

So,P(B|A')=0.04

We are supposed to find  the probability that an individual has this disease given that the test indicates its presence i.e. P(A|B)

So we will use Bayes theorem

[tex]P(A|B)=\frac{P(B|A) P(A)}{\sum P(B|A) P(A)}[/tex]

[tex]P(A|B)=\frac{0.85 \times 0.1}{0.85 \times 0.1+0.85 \times 0.9}=0.1[/tex]

Hence the probability that an individual has this disease given that the test indicates its presence is 0.1

Answer:

Dimensions of Rectangle B will be 9x inches by 3x inches where x is a scaling factor.

Step-by-step explanation:

Scaled Copy: It means that the rectangle A is related to rectangle B by some scaling (multiplying) factor x.

As we are given Dimensions of rectangle A =  9 inches by 3 inches

Then for any scaling factor x the dimensions of rectangle B will be:

Dimensions of Rectangle B = x * ( Dimensions of rectangle A)

Dimension of rectangle B = x * (9 inches by 3 inches)

Dimensions of rectangle B = 9x inches by 3x inches

For more understanding let we assume that rectangle B is scaled copy of rectangle A by scaling factor x=3; then we will have the dimensions of rectangle B as under:

For scaling factor (x) = 3;

Dimensions of Rectangle B = x * ( Dimensions of rectangle A)

Dimensions of rectangle B = 3 (9 inches by 3 inches)

Dimensions of rectangle B = 27 inches by 9 inches

On the other hand for scaling factor x=0.75, the dimensions of rectangle B will become as under;

Dimensions of Rectangle B = x * ( Dimensions of rectangle A)

Dimensions of rectangle B = 0.75 (9 inches by 3 inches)

Dimensions of rectangle B = 6.75 inches by 2.25 inches

Answer:

The probability that exactly 2 don't grow is 0.075 or 7.5%

Step-by-step explanation:

Binomial Distribution

Let's consider a random experience with only two possible outcomes. Call p to the probability that the event has a successful outcome and q to the unsuccessful outcome.

It's clear that p+q=1, or q=1-p.

Now repeat the random experience n times. We want to calculate the probability of getting x successful outcomes. This can be done with the following formula:

[tex]\displaystyle P_{x} = {n \choose x} p^{x} q^{n-x}[/tex]

Where  

[tex]\displaystyle {n \choose x}[/tex]

Is the number of combinations:

[tex]\displaystyle {n \choose x} =_nC_x=\frac{n !}{x ! (n-x) !}[/tex]

For the problem to solve, each seed has a p=0.95 probability of growing into a healthy plant. The value of q=1-0.95=0.05.

The experience is repeated n=10 times and we want to estimate the probability that 2 of them don't grow. Note this last data is not directly the value of x because it's not related to success but with no success. The value of x is x=10-2=8. That means, 8 out of 10 seeds grow.

Apply the formula:

[tex]\displaystyle P_{8} = {10 \choose 8} \cdot 0.95^{8} \cdot 0.05^{10-8}[/tex]

[tex]\displaystyle P_{8} = 45\cdot 0.95^{8} 0.05^{2}[/tex]

[tex]\displaystyle P_{8} = 0.075[/tex]

The probability that exactly 2 don't grow is 0.075 or 7.5%

Answer:

130 balloons

Step-by-step explanation:

Answer:

The company lost 3 dollars

9-6= (-3)

Step-by-step explanation: