what is b in the equation b-8+2b=20

Answer:

3

Step-by-step explanation:

15-2x=3x

or,3x+2x=15

or,5x=15

or,x=15/5

Therefore, x=3.

Answer:

126

Step-by-step explanat

(30)(15) - (72%)

Answer:

$1296

Step-by-step explanation:

paycheck in 1 month: $15/hour * 30 hours/week * 4 weeks/month = $1800/month

net pay = 72% of paycheck in 1 month = 72% of $1800 =

= 0.72 * $1800 = $1296

Answer:

∠DBE=1/3∠ABE ---> ∠DBE/ ∠ABE=1/3---->∠DBE/(∠DBE+∠ABE)=1/1+3

∠DBE=1/4 x 90=18 ----> ∠CBE=90 + 22.5=112.5

Step-by-step explanation:

Answer:

112.5°

Step-by-step explanation:

[tex] m\angle DBC = 90\degree.... (given) \\

m\angle DBE = \frac{1}{3}m\angle ABE.... (given) \\

m\angle ABE + m\angle DBE +m\angle DBC= 180\degree\\.. (straight \: line \: \angle 's) \\

m\angle ABE + \frac{1}{3}m\angle ABE +90\degree= 180\degree\\

\bigg(1+ \frac{1}{3}\bigg) m\angle ABE = 180\degree - 90\degree \\

\bigg(\frac{3+1}{3}\bigg) m\angle ABE = 90\degree \\

\frac{4}{3} m\angle ABE = 90\degree \\

m\angle ABE = 90\degree \times \frac{3}{4}\\

m\angle ABE = \frac{270\degree}{4}\\

\huge\red {\boxed {m\angle ABE = 67.5\degree}} \\

\therefore m\angle DBE = \frac{1}{3}\times 67.5\degree \\

\huge \purple {\boxed {\therefore m\angle DBE = 22.5\degree}} \\

m\angle CBE = m\angle CBD + m\angle DBE\\

\therefore m\angle CBE = 90\degree + 22.5\degree\\

\huge \orange {\boxed {\therefore m\angle CBE = 112.5\degree}} [/tex]

Answer: False

Point Z is part of the sequence XYZ, so that means point Z is part of plane XYZ.

Answer:

false contradiction

Step-by-step explanation:

The '⊥' symbol stand for false contradiction. The up tack or falsum ('⊥') is a constant symbol used to represent: The bottom element in lattice theory. ... A logical constant denoting "false" in logic.

Step-by-step explanation:

The symbol shows to be perpendicular since the vertical line is dividing the horizontal in half with an angle of 90 I guess

Answer:

the second choice which is positive 4 is the answer

Answer:

4

Step-by-step explanation:

(-80)/(-20)=

(-40)/(-10) when divided by 2

(-20)/(-5) when divided by 2 again

(-4)/(-1) when divided by 5

4 when divided by -1

Hope this helps

(pls mark brainliest)

Answer:

Step-by-step explanation:

sweet

The approximate probability that Ankit will make all three shots is 0.405 or 40.5%.

A probability distribution known as the binomial distribution is used to characterize the number of successes in a certain number of independent trials, where each trial has only one of two potential outcomes (success or failure) and the chance of success is constant across all trials. For determining the likelihood of achieving a certain number of successes in a set number of trials, it is utilised.

Given, Ankit makes 74% of the free throws.

Using binomial distribution we have:

[tex]P(X=k) = (n C k) * p^k * (1-p)^{(n-k)}[/tex]

For k = 3 we have:

[tex]P(X=3) = (3 C 3) * 0.74^3 * (1-0.74)^{(3-3)}\\\\P(X=3) = 0.74^3[/tex]

P(X=3) ≈ 0.405

Hence, the approximate probability that Ankit will make all three shots is 0.405 or 40.5%.

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Complete question is;

Henrique began to solve a system of linear equations using the linear combination method. his work is shown below

1. 3 (4x-7y=28) -> 12x-21y=84

-2 (6x-5y=31) -> -12x 10y =62

2. 12x - 21y = 84

-12x + 10y = -62

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

-11y = 22

3. y= -2

complete the steps used to solve a system of linear equations by substituting the value of y into one of the original equation s to find the value of x. what is the solution to the system

Answer:

x = 3.5

Step-by-step explanation:

We are given;

1. 3(4x - 7y = 28) -> 12x - 21y = 84

-2(6x - 5y = 31) -> -12x + 10y = 62

2. 12x - 21y = 84

-12x + 10y = -62

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

-11y = 22

3. y= -2

Since y = - 2, let's put -2 for y into the equation; 12x - 21y = 84

This gives;

12x - 21(-2) = 84

This gives;

12x + 42 = 84

12x = 84 - 42

12x = 42

x = 42/12

x = 3.5

Answer:

[tex]\Huge \boxed{\mathrm{\bold{a)} \ < \ }}[/tex]

[tex]\rule[225]{225}{2}[/tex]

Step-by-step explanation:

1 - 5 __ 9

Subtract.

-4 __ 9

We know that -4 is less than 9.

The “less than” symbol is “<”.

[tex]-4<9[/tex]

[tex]\rule[225]{225}{2}[/tex]

Answer:

v=3

Step-by-step explanation:

The correct answer will be option C Randomization of students in morning and afternoon classes.

Psychology is the scientific study of the mind and behavior, according to the American Psychological Association.

The only way to minimize this effect would be through randomization of students in morning and afternoon classes.

Doing so apply the factor of skill from an individual student to either time of day class greatly lessens the overall effect that it has on the results.

This therefore, minimizes the effect it has on the experiment itself, since the same students that have been studying in a certain time of day would be randomized and not have the same environment that they are used to.

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Answer:

Step-by-step explanation:

Direct control by requiring every class to take the same test

Answer:

work shown and pictured

Answer:

(a) 14.21 = 0.80x +  0.11 (0.80x)

(b) The original price of the t-shirt was $16.

Step-by-step explanation:

The information provided are:

(a)

Assume that the original price of the t-shirt was $x.

The discounted amount would be, x ( 1 - 0.20) = 0.80x.

The sales tax amount would be, 0.11 (0.80x).

Then the total amount paid by Marvin can be represented by the equation:

Total = Discounted amount + Sales tax amount

14.21 = 0.80x +  0.11 (0.80x)

Thus, the equation that can be used to find the original price of the t-shirt is:

14.21 = 0.80x +  0.11 (0.80x)

(b)

Compute the value of x as follows:

[tex]14.21 = 0.80x + 0.11 (0.80x)[/tex]

[tex]14.21=0.80\times 1.11\times x[/tex]

     [tex]x=\frac{14.21}{0.80\times 1.11}\\\\x=16.0023\\\\x\approx \$16[/tex]

Thus, the original price of the t-shirt was $16.

Answer:

[tex] \boxed{ \bold{ \huge{ \boxed{ \sf 240 \: {inches}^{2} }}}}[/tex]

Step-by-step explanation:

Given,

Length of a rectangle = 20 inches

Perimeter of a rectangle = 64 inches

Area of a rectangle = ?

Let width of a rectangle be ' w ' .

First, finding the width of a rectangle

[tex] \boxed{ \sf{perimeter = 2(l + w)}}[/tex]

plug the values

⇒[tex] \sf{64 = 2(20 + w)}[/tex]

Distribute 2 through the parentheses

⇒[tex] \sf{64 = 40 + 2w}[/tex]

Swap the sides of the equation

⇒[tex] \sf{40 + 2w = 64}[/tex]

Move 2w to right hand side and change it's sign

⇒[tex] \sf{2w = 64 - 40}[/tex]

Subtract 40 from 64

⇒[tex] \sf{2w = 24}[/tex]

Divide both sides of the equation by 2

⇒[tex] \sf{ \frac{2w}{2} = \frac{24}{2} }[/tex]

Calculate

⇒[tex] \sf{w = 12 \: inches}[/tex]

Width of a rectangle ( w ) = 12 inches

Now, finding the area of a rectangle having length of 20 inches and width of 12 inches

[tex] \boxed{ \sf{area \: of \: rectangle = length \: \times \: \: width}}[/tex]

plug the values

⇒[tex] \sf{area \: of \: rectangle =20 \times 12 }[/tex]

Multiply the numbers : 20 and 12

⇒[tex] \sf{area \: of \: rectangle = 240 \: {inches}^{2} }[/tex]

Hence, Area of a rectangle = 240 inches²

Hope I helped !

Best regards!

Answer:

the square root of 225 is 15.9

Answer:

15.♾

Step-by-step explanation:

Answer:

Step-by-step explanation:

- 6x + 9 > 7x + 74

Treat them as being equal first.

Subtract 9 from both sides.

- 6x + 9 - 9 > 7x + 74 - 9

- 6x > 7x + 65

Subtract 7x from each side

- 6x - 7x > 7x - 7x + 65

- 13x > 65

Divide each side by -13

- 13x / -13  > 65 / -13

x < -5

So x hust be smaller than -5 meaning -6 works but -4 doesn't.

Answer:

Linear

Step-by-step explanation:

It goes up by 2 each time, so it would be linear.

Answer:

It will take approximately 9.3 weeks for Kevin to lose the

Step-by-step explanation:

current weight  of Dog = 78 pounds

Required weight to be shed off = 14 pounds

weight lost in 1 week = 1.5 pounds

Let the number of weeks required to lose 14 pounds be w.

Assuming that the rate of weight loss per week is constant

(weight lost in 1 week) × (number of weeks) = 14 pounds

1.5 × w = 14

w = 14 ÷ 1.5 = 9.3 weeks

Therefore it will take approximately 9.3 weeks for Kevin to lose the weight

Answer:

circumference = 18.84cm

area = 28.26cm

Step-by-step explanation:

Answer:

(0, -5)

Step-by-step explanation:

When we rotate a point around the origin 180°, the original coordinates (x, y) become (-x, -y).

So,

-0 is just 0 (since 0 is both negative and positive)

-(5) is -5

This makes our new point (0, -5).

Hope this helped!

Answer: It is B

Step-by-step explanation:

Answer:

see below

Step-by-step explanation:

alaikum salam.

2. find cos Ф,   sin Ф,  tan Ф

cos Ф = 5 / 13

Ф = 67.38

sin Ф = 12 / 13

Ф = 67.38

tan Ф = 12 / 5

Ф = 67.38

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

3. find sin β,  cos β,  tan β

sin β = 4 / 5

β = 53.13

cos β = 3 / 5

β = 53.13

tan β = 4 / 3

β = 53.13

Answer: Step-by-step explanation

2.

cos Ф = 5 / 13 ,       Ф = 67.38

sin Ф = 12 / 13 ,      Ф = 67.38

tan Ф = 12 / 5         Ф = 67.38

3.

sin β = 4 / 5    β = 53.13

cos β = 3 / 5    β = 53.13

tan β = 4 / 3     β = 53.13

Answer:E

Step-by-step explanation:

just took the test

The atmosphere is divided into five different layers, based on temperature.

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Answer:

each

Step-by-step explanation:

In geometry, transformation involves changing the position or size of a shape.

The information, Jada needs to provide are:

When a polygon is translated, the direction(s) of translation and the units of translation must be stated.

Take for instance:

A translation of 2 units left.

The direction of the above translation is left, while the unit is 2

Also, when a polygon is reflected, the line of reflection must be stated. There are several lines of reflection; the most popular ones are:

Read more about reflection and translation at:

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Answer: $1.17 per drink

Step-by-step explanation:

Let x=the cost of one drink

11.5+6x=18.5

subtract 11.5 on both sides

11.5+6x-11.5=18.5-11.5

6x=7

Divide 6 on both sides

6/6 x=7/6

x=7/6

7/6≈$1.17

Hope this helps!! :)

Please let me know if you have any question