if x equals 3 what is 7x to the second power+ 2x

Answers

Answer 1

Answer:

447

Step-by-step explanation:

7x = 21

2x = 6

21^2+6

441 + 6

447


Related Questions

PLEASE HELP IMMEDIATELY!!! WILL MARK AS BRAINLIEST

Answers

Answer:

2

Step-by-step explanation:

Enter the pair of fractions 6/7 and 13/14 with the smallest common denominator between the two fractions

Answers

Answer:

25/14

Step-by-step explanation:

Which of the following measures could NOT be the three sides of a triangle?

Question 13 options:

2 in, 5 in, 6 in


17 in, 8 in, 10 in


22 in, 20 in, 5 in


15 in, 4 in, 20 in

Answers

Answer:

15 in, 4 in, 20 in

Step-by-step explanation:

The sum of the smaller two sides of a triangle must be greater than the third side.

Find the Median for the following set of numbers.
6, 9, 8, 11, 17, 17, 16

Answers

OK so first you’re going to put it all in order from least to greatest so it’s going to be 6, 8, 9, 11, 16, 17, 17. And then you’re going to have to cross out six then the last 17 then 8 then the next 17 then 9 then 16 and then the answer you’ll have it it’s going to be 11

what is 3/8 + 1/4 please help me

Answers

Answer:

Step-by-step explanation:

3/8+1/4

LCM

3/8+2/8

5/8

the answer is 5/8!!!

Pls Help! This is due today! Find the value of x:

Answers

Answer is X= 23.......

Answer:

x = 23

Step-by-step explanation:

the sum of all interior angles of  triangle is 180 dehrees.

top angle = 180-100 = 80 degrees

80 + 51 + (2x+3) = 180

2x+3 = 49

2x = 46

x = 23

9) A car dealer offers a discount of 20% off the normal price of a car, for cash. Peter intends to buy a car which usually cost £6800. He intends to pay by cash. Work out how much he will pay.

10) A month ago, John weighed 97.5 kg. He now weighs 4.5% more. Work out how much John now weighs. Give your answer to 1 decimal place.

Answers

Answer:

1360

Step-by-step explanation:

Can y’all help me on question nine?!

Answers

Answer:

24

Step-by-step explanation:

x=2

x³+7x+2

2³+14+2

8+14+2

24

John sells apples for $5 per bunch and watermelons for $3 a piece. He made $100 today and sold 10 watermelons. How many bunches of apples did he sell?

Answers

Answer:

14

Step-by-step explanation:

3*10=30

5*14=70

30+70=100!!!  

Answer:

he sold 14 apples

Step-by-step explanation:

multiply 10 (watermelon) and 3 (the cost) which is 30

now subtract 30 from 100 which is 70

last do 5 (the cost of apple bunch) by 70 to find the total number of bunches he sold which is 14

Fewer than 50 people bought tickets

Answers

it doesn't make sense kay

Jake cuts out five-pointed stars. They are different sizes, but they
all have the same shape. The side lengths within each star are the same.
To find the perimeter of each star, Jake uses the expression
12£ + ½ - 4€ - 8.5 + 2€ + 8, where e is the side length of the star.
Find the perimeter of a star with side length 6 inches. :( pls help me

Answers

Download Socratic for the correct answer btw I need points;)

Find the equation of the line through the points (-8,3) and (-4,5).

Answers

Answer:

[tex]2y - x = 14[/tex]

Step-by-step explanation:

Given

[tex](x_1,y_1) = (-8,3)[/tex]

[tex](x_2,y_2) = (-4,5)[/tex]

Required

The line equation

First, calculate the slope (m)

[tex]m = \frac{y_2 - y_1}{x_2 - x_1}[/tex]

[tex]m = \frac{5 - 3}{-4 - (-8)}[/tex]

[tex]m = \frac{2}{4}[/tex]

[tex]m = \frac{1}{2}[/tex]

The equation is then calculated as:

[tex]y = m(x - x_1) + y_1[/tex]

[tex]y = \frac{1}{2}(x - (-8)) +3[/tex]

[tex]y = \frac{1}{2}(x +8) +3[/tex]

Open bracket

[tex]y = \frac{1}{2}x +4 +3[/tex]

[tex]y = \frac{1}{2}x +7[/tex]

Multiply through by 2

[tex]2y = x + 14[/tex]

[tex]2y - x = 14[/tex]

Please help with this

Answers

Answer:

check pdf

Step-by-step explanation:

40 - 10 + 20

Don’t answer until when it’s one min later....there is a timer on my math probs so ya

Answers

Answer:

The answer is 50

Step-by-step explanation:

40-10=30

30+20=50

Answer this correctly I'll give brainalist + 10 points

Answers

Answer:

55

Step-by-step explanation:

The line is 180 and 180-125=55

A circular flower bed in a botanical garden has a radius of 7 feet.

What is the area of the flower bed?

Use 3.14 for π.

Question 8 options:

153.86 feet


43.96 feet


21.98 feet

Answers

I think it would be 153.86 feet

What percent is equivalent to 1/10?

Answers

Answer: 10%

Step-by-step explanation:

1/10 is equal to .10 or 10%

Answer:

10%

Step-by-step explanation:

Divide 1 by 10 and you get 0.10 :)

Help me and I’ll give you brainliest

Answers

Answer:

The answer is 21

Find the volume of a pyramid with a square base, where the perimeter of the base is 7.4 ft and the height of the pyramid is 8.1 ft. Round your answer to the nearest tenth of a cubic foot.

Answers

9514 1404 393

Answer:

  9.2 ft³

Step-by-step explanation:

The side length of the square base is 1/4 of the perimeter, so is ...

  s = P/4 = (7.4 ft)/4 = 1.85 ft

The area of the base is the square of this, or ...

  A = s² = (1.85 ft)² = 3.4225 ft²

The volume of the pyramid is given by ...

  V = 1/3Bh = (1/3)(3.4225 ft²)(8.1 ft) = 9.24075 ft²

The volume of the pyramid is about 9.2 cubic feet.

2t + 4(4 + 10t)
Simplify the expression

Answers

Answer:

=42t+16

Step-by-step explanation:

=2t+(4)(4)+(4)(10t)

=2t+16+40t

=2t+16+40t

=(2t+40t)+(16)

=42t+16

Simplify the expression

2t + 4(4 + 10t)

Simplifying

y = 2t4 + -10t2 + 13

Reorder the terms:

y = 13 + -10t2 + 2t4

Solving

Solving for variy = 13 + -10t2 + 2t4

able 'y'.

Move all terms containing y to the left, all other terms to the right.

Simplifying

y = 13 + -10t2 + 2t4

Hence the information I've given you, we can now state that the answer is

42 t  +  16  

The store ordered small posters and large posters to promote their opening. 12 times as many small posters were ordered as large posters. If there were 48 large posters, how many more small posters were ordered than large posters.

\

Answers

Answer:

I think it is 576 small posters.

Step-by-step explanation:

48×12= 576

The area of a poster board is (x2 + 9x - 10) square inches. Find the dimensions of the poster board If
x = 15.

Answers

Answer:

155 square inches

Step-by-step explanation:

(15)2+9(15)-10 or 30+135-10

J\5 = 6 . What does " J "equals ????​

Answers

Answer:

J=30

Step-by-step explanation:

Answer:

Step-by-step explanation:

imaginary unit

The temperature changes from 9°F to -5°F. Which of the following expressions model the distance on thermometer between 9°F and -5°F? Choose all the correct answers

A I -5 -9 I

B I 9 -5 I

C I 9- (-5) I

D I -5 (-9) I

E I -9 - (-5) I

Answers

Answer:

[tex]d = |- 5- 9|[/tex]

Step-by-step explanation:

Given

[tex]Initial = 9^\circ F[/tex]

[tex]Final = -5^\circ F[/tex]

Required

Determine the difference

Represent this with d.

d is calculated using

[tex]d = |Final - Initial|[/tex]

The equation becomes

[tex]d = |- 5- 9|[/tex]

What is the domain?
(-∞,∞)

[0,∞)

(-∞,0]

-2, 2

Answers

Answer:

(-∞,∞)

Step-by-step explanation:

The domain is the possible x values, so for this function x^2 , the possible x values are all the values

(-infinity , infinity)

WILL MARK BRAINLYIST

Answers

Answer:

the answer would be true

Answer:

FALSE

Step-by-step explanation:

The answer is false because the length between DC is 6 and the length between EB is 8. If the lines were parallel, both lines would have the same length.

simpfly (7x+5)-(2x2-8x+6) choose the standard form of the answer

Answers

Step-by-step explanation:

7x+5-2x^2+8x+6

-2x^2+15x+11

Consider a graph of the equation y = x + 6. What is the y-intercept? (5 points) 6 −1 1 −6

Answers

D  I am not 100% sure, If I am wrong sorry

A recipe that makes 4 servings calls for Two-thirds cup of flour. How much flour is required to make 20 servings?
6 cups
3 and one-third cups
two-thirds cups
StartFraction 2 over 15 EndFraction cups

Answers

Answer:

8/3

Step-by-step explanation:

Answer:

3 1/3

Step-by-step explanation:

sorry

Need help ASAP !!!
Solve for u

Answers

Answer:

3.46 or ..

[tex] 2\sqrt{3} [/tex]

Step-by-step explanation:

because you use sin(60) = 3/u

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