work out the value of 21+2x when x = -2

Answers

Answer 1

Hey there!


21 + 2x

= 21 + 2(-2)

= 21 - 4

= 17


Therefore, your answer is: 17


Good luck on your assignment & enjoy your day!



~Amphitrite1040:)


Related Questions

How do I do GCF (greatest common factor on -5y - 35? I need help because I am not good at it.

Answers

Answer:

-5(y+7)

Step-by-step explanation:

Well, the numbers you can divide 5 with are 1 and 5.

35 divides both with 1 and 5 too, but since 5 is the greatest, you choose 5.

so,

you divide both with -5, since both are negative.

-5y/-5 = y

-35/-5 = 7

so,

-5(y+7)

check:

-5*y = -5y

-5*7 = -35

so,

-5y-35, that's true.

Answer:

GCF = 5

Step-by-step explanation:

for the values 5, 35

Solution by Factorization:

The factors of 5 are: 1, 5

The factors of 35 are: 1, 5, 7, 35

Then the greatest common factor is 5.

determine the solution to the system of equations g(x)=3x+2, f(x)=x-4+2

Answers

The solution to the given system of equations is the point (1, 5).

How to solve the system of equations?

Here we have the system of equations:

g(x) = 3x + 2

f(x) = |x - 4| + 2

To solve this, first you can see where the graphs intercept on the graph (the intercept point is the solution to the system)

But we can also solve it analytically. To do it, we have:

g(x) = f(x)

3x + 2 =  |x - 4| + 2

3x =  |x - 4|

Notice that the only solution of the above equation is x = 1, so we know that it is the x-value of the solution.

To get the y-value, we just evaluate one of the two given functions on x = 1.

f(1) = |1 - 4| + 2= 3 + 2 = 5

Then the solution to the system is the point (1, 5).

If you want to learn more about systems of equations, you can read:

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Find the unknown side length, x. Write your answer in simplest radical form.
A. 4132
B. 22
C. 16/5
D. 16 V13

Answers

Answer:

C

Step-by-step explanation:

Use the pythagorean theorem.

32^2+b^2=48^2

1024+b^2=2304

Subtract 1024

b^2=1280

Square root

b=sqrt(1280)

Now simplify sqrt(1280)

sqrt(1280) = sqrt(256*5)

You can take the square root of 256 since it is a perfect square so take it out of the radical.

sqrt(256*5)=16sqrt(5)

So the answer is c, 16[tex]\sqrt{5}[/tex]

Answer:

C. 16/5

Step-by-step explanation:

pythagorean theorem

a^2 + b^2 = c^2

divide 48 and 32 by 16

a= 2 c= 3

4 + b^2 = 9

b^2 = 5

b = √5

then multiply 16 with √5

which =

16√5

There is a pair of parallel sides in the following shape.

What is the area of the shape?

Answers

Answer:

The given shape is Trapezium

Area of Trapezium= 1/2h(L1+L2)

=1/2×7×(11+3

=1/2×7×14

=49

Your answer is 49

Evaluate each expression
6! =
3! • 2=
31

Answers

N-FACTORIAL!

[tex] \mathbb{ \color{brown} \: PROBLEM } \: \: \bold{{ \color{brown}{1}}} : [/tex]

[tex] \mathcal{SOLUTION: }[/tex]

[tex] \: \bold{ \red{6!}= 6×5×4×3×2×1= \boxed{ \bold{ \blue{720}}}}[/tex]

Therefore, the value of 6! is 720.

━┈─────────────────────┈━

[tex] \mathbb{ \color{brown} \: PROBLEM } \: \: \bold{{ \color{brown}{2}}} : [/tex]

[tex] \mathcal{SOLUTION: }[/tex]

[tex] \bold{3! \cdot 2! }\implies \bold{(3×2×1) \cdot( 2×1 )}[/tex]

[tex] \: \: \: \: \: \: \: \: \: \: \: \: \implies \: \bold{ 6 \times 2} = \boxed{ \bold{ \blue{12}}}[/tex]

Therefore, the value of the given expression is 12.

━┈─────────────────────┈━

EXPLANATION:The mathematical symbol n! is read as "n factorial". The exclamation point "!" is read as factorial. And please remember or take note that 0! is equal to 1, and 1! is also equal to 1.

ฅ^•ﻌ•^ฅ

_______________∞_______________

What is the sample space for a spinner with four equal sections, numbered 1 to 4?

Answers

Answer:

Step-by-step explanation:

we are given A spinner has six equal-sized sections numbered 1, 1, 2, 2, 3, and 4 Sample space:

the sample space of an experiment or random trial is the set of all possible outcomes or results of that experimentso, we will only unique outcomesso, sample space is S={1,2,3,4}................Answer

Create an equation that models the number of tiles in a given stage.

Answers

The number of tiles (y) at any x stage is given by the equation y = 2x - 1

What is an equation?

An equation is an expression that shows the relationship between two or more variables and numbers.

From the table, the number of tiles increases by 2 for every additional stage. Let y represent the number of tiles and x represent the stage, hence:

y = 1 + (x - 1)2

y = 2x - 1

The number of tiles (y) at any x stage is given by the equation y = 2x - 1

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5. Are the two triangles shown below similar? If so, name the value of the scale factor.

A. no, these triangles are not similar
B. yes, these are similar. the scale factor is 0.8.
C. yes, these are similar. the scale factor is 0.4.
D. yes, these are similar. the scale factor is 0.6.

Answers

A. no, these triangles are not similar

A small plot of land is shaped like the figure shown.
What is the area of the plot of land?
А)
(A
43 yd?
(В) 153 yd?
© 306 yd?
D 1,188 yd?

Answers

B) 153 yd²

hope this helps :)

Help me please.Thank you.
Find the value of the function with the given value.
f(a)= -2a^4+11a^3+5a^2+42 at a=6

Answers

Answer:

6

Step-by-step explanation:

if you plug in and add it all up you get 6

2 tens 3 ones 2 tenths
Change it into a decimal form

Answers

2 tens 3 ones 2 tenths

23.2
23.2
The second 2 goes behind the decimal point because it says “tenths” the “ths” means it goes behind the decimal point like hundredths, thousandths

these figures are similar. the area of one is given. find the area of the other
I'll give brainliest

also the answer isn't 12

Answers

Answer:

I believe 6in squared is the correct answer

Step-by-step explanation:

Answer:

6

Step-by-step explanation:

6*?=24 in

6*4=24in

if it is 3 in on the smaller one, it also will be 2 so it will be 6.

Find the area! (no explanation neededd)

Answers

Area of top rectangle

9×545mi²

Area of horizontal rectangle (Left):-

9(9+5)14(9)126mi²

Area of right rectangle:-

4×624mi²

Area of triangle:-

1/2(4)(4)8mi²

Total:-

8+45+126+24203mi²

What is the answer for the two?

Answers

Answer:

when DAE is at 16° and EDC is at 64° then ABC is at 45° and BCD is at 55°.

What is a golden rectangle and give an example of a real-life situation that uses a golden rectangle?

Answers

The Golden Rectangle—also called the Golden Mean or the Section d’Or, is a form with certain ratio of parts. That ratio—1.618…—is an irrational number, which means the decimal continues with no known end.

A rectangle with proportions close to the Golden Ratio of approximately 1:1.618 is believed to be aesthetically pleasing.

What is the golden rectangle?

A rectangle with sides that are in the golden ratio, or roughly 1:1.618, is referred to as a golden rectangle. This ratio has been employed in art, architecture, and design for ages since it is seen to be aesthetically beautiful.

To build a golden rectangle, start with a square and then add a smaller square to one of its sides to form a rectangle. The smaller rectangle is then used to repeat this procedure until you obtain a rectangle whose sides are in the golden ratio.

The layout of credit cards is one instance of a situation in real life that makes use of a golden rectangle. Golden rectangles are a popular shape for credit cards because of their attractive proportions and visual balance. A golden rectangle may also be used in credit card designs to help the card stand out from other cards and be simpler to recognize. The dimensions of several paintings, sculptures, and structures are more instances of how golden rectangles are used in the design.

More about the golden rectangle link is given below:

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Which expression is equivalent to startfraction 5 y cubed over (5 y) superscript negative 2 baseline endfraction?

Answers

The expression that is equivalent to the given expression is 125y⁵.

The given expression is:

[tex]\frac{5y^{3} }{(5y)^{-2} }[/tex]

What are some important power rules applicable to the given problem?

Some important power rules applicable to this problem are:

1)[tex](ab)^m=a^mb^m[/tex]

2)[tex]\frac{1}{a^{-n} } =a^n[/tex]

So, [tex]\frac{5y^{3} }{(5y)^{-2} } =\frac{5y^{3} }{5^{-2} y^{-2} }[/tex].....by power rule (1)

[tex]=(\frac{5}{5^{-2} } )(\frac{y^3}{y^{-2} })[/tex]

[tex]=5^3y^5[/tex].....by power rule(2)

[tex]=125y^5[/tex]

Hence, the expression that is equivalent to the given expression is 125y⁵.

To get more about power rules visit:

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Two angles are supplementary. If angle A is five times the sum of the angle B plus 7. 2, what is angle B

Answers

Answer:

Angle B = 24°

Step-by-step explanation:

Given:

Angles are supplementary Angle A is 5 times the sum of angle B plus 7.2

that means, Angle A = 5 ( Angle B + 7.2 )

Now,

Let Angle B = x (say)

•.• Angle A = 5 ( x + 7.2 )

Supplementary angles are a pair of angles that make sum of 180° .

Therefore, As it is given that the angles are supplementary , the sum of Angle A and Angle B will be equal to 180°.

Angle A + Angle B = 180°

[tex]⇢x + 5(x + 7.2) = 180[/tex]

[tex]⇢x + 5x + 36 = 180[/tex]

[tex]⇢6x = 180 - 36[/tex]

[tex]⇢6x = 144[/tex]

[tex]⇢x = \frac{144}{6} [/tex]

[tex]⇢ \boxed{x = 24}[/tex]

Now, substituting the value of x. . .

Angle B = 24°Angle A = 5( 24+ 7.2 ) = 5( 31.2 ) = 156°

Thus, Angle B comes out 24°

In 2018 there were 238 Republicans and 201 Democrats in the House of Representatives. Find the percentage of Democrats in the House of Representatives in 2018

Answers

Answer:

45.7% or if rounded, 46%

Step-by-step explanation:

1st, you add up the total of people in the House of Representatives.

238+201=439

Then divide the number of Democrats 201 by the total number 439 to get .457  which is 45.7% or if you need to round 46%

To double check, multiply the total number 439 X 45.7% to get 200.6

At the end of a football game, the players were given the choice of having a bottle of water or a bottle of juice

Answers

There were 16 total players at the baseball game of which 12 of the players chose a bottle of water.

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Let p represent the total number of players, 2 of the players chose a bottle of water which accounted for 3/4 of the total players, hence:

(3/4)p = 12

p = 16

There were 16 total players at the baseball game.

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6) WILL GIVE BRAINIEST TO BEST ANSWER
find the equations use to solve
Graphing!

Answers

Answer:

A: y=-2x-2

B: y=-2x+2

Step-by-step explanation:

What is the ratio of 2 miles driven and $6. 00 cab fare

Answers

Answer:

2 to 6, 2/6, or 2:6

Step-by-step explanation:

a ratio is a comparison of two values expressed as a quotient

Factor –8x3 – 2x2 – 12x – 3 by grouping. what is the resulting expression? (2x2 – 3)(4x 1) (–2x2 – 3)(–4x 1) (2x2 – 3)(–4x 1) (–2x2 – 3)(4x 1)

Answers

The factors of the expression are [tex]\rm (4x+1)(-2x^2-3)[/tex]

How to find factors in the expression?

First group the first two terms and the last two terms together respectively.

The factors of the expression are given by;

[tex]\rm -8x^3 -2x^2 - 12x - 3\\\\-2x^2(4x+1)-3(4x+1)\\\\(4x+1)(-2x^2-3)[/tex]

Hence, the factors of the expression are [tex]\rm (4x+1)(-2x^2-3)[/tex].

To know more about factors click the link given below.

https://brainly.com/question/9645056

h(n) = -n + 3
g(n) = 2n + 3
Find h (-7).g(-7)

Answers

Answer: -110

Step-by-step explanation:

Which equation is quadratic in form? 3x^5+8x^3+6=0

Answers

Answer:

exponential equation

thia is the form of quadratic equation

Answers with steps please

Answers

Answer:

Step-by-step explanation:

Hypotenuse: This the longest side of right angle triangle and it is opposite to 90°

[tex]1) Sin \ P = \dfrac{Oppossite \ side \ of \ \angle P}{hypotenuse}\\\\ =\dfrac{4\sqrt{10}}{14}[/tex]

[tex]Cos \ P =\dfrac{adjacent \ side \ of \angle P}{hypotenuse}\\=\dfrac{6}{14}[/tex]

[tex]7)\sf Cos \ X = \dfrac{adjacent \ side \ of \angle X}{hypotenuse}\\\\Cos \ X =\dfrac{8}{18}\\\\Cos \ X = 0.4\\\\X = Cos^{-1} \ 0.4[/tex]

X = 66°

8) Here, opposite side is given and we have to find hypotenuse. So, use Sin.

[tex]Sin \ 65 =\dfrac{10}{x}\\\\0.9 *x = 10\\\\x =\dfrac{10}{0.9}[/tex]

x = 11.1

10) Here, opposite side is given and we have to find hypotenuse. So, use Sin to find x

[tex]Sin \ X =\dfrac{6}{9}\\\\Sin \ X = 0.67\\\\x= Sin^{-1} \ 0.97[/tex]

x = 42°

maya drove 693 miles in 11 hours how long would it take her to drive 819 miles

Answers

Answer:

13

Step-by-step explanation:

693/11 = 63 miles per hour

819/63 = 13

What is the equation of the line that passes through the point (-2, -2) and is perpendicular to the line y = 2x+5

Answers

product of two perpendicular line slopes must equals - 1 ;

As you know the coefficient of x is the slope of the line

Thus if we suppose that line has a slope of m , we have :

m × 2 = - 1

m = - 1 / 2

__________________________________

y = ax + b

y = - 1 / 2 x + b

The line passes through the point ( - 2 , - 2 ) thus :

- 2 = - 1 /2 × ( - 2 ) + b

- 2 = 1 + b

b = - 3

__________________________________

y = - 1/2 x - 3

Which mean the option c is the correct answer.

Answer:

y = -1/2(x) - 4

Step-by-step explanation:

[tex]y=-\frac{1}{2}(x)-4[/tex]

solve for w and y

w=

y=​

Answers

Answer:

[tex]w = 10 \sqrt{2} [/tex]

[tex]y = 20[/tex]

Step-by-step explanation:

Use the Sine Rule to solve for the unknown sides.

Can someone help me with this problem? Thanks

Answers

Answer:

8(5+8)

Step-by-step explanation:

The GCF of 40 and 64 is 8. Then you divide 40 and 64 by 8.

Andre is solving the equation 4(x + 3) = 7. He says,"I can subtract from each side to get
4x = 1 and then divide by 4 to get x = "Kiran says, "I think you made a mistake."

a. How can Kiran know for sure that Andre's
solution is incorrect?

b. Describe Andre's error and explain how to
correct his work.

Answers

Answer:

Step-by-step explanation:

Kiran can know for sure that it is incorrect by substituting x with 1/4

Solving for the equation gives 4(1/4 + 3) = 7
distributing gives 1 + 3 = 7
obviously this is incorrect

b)
Andre's error is that he didnt distribute 7
Distributing 7 results in
4x + 12 = 7
then subtracting 12 from both sides
4x = -5
x = -5/4

Answer:

x=-1.25

Step-by-step explanation:

well he was wrong about the 4x = 1.

4(x+3)=7

4x+12=7    1. - 12 on both sides

4x=-5   2. 4 on both sides

x=-1.25

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