How far away is the lightning if you hear the thunder 8 seconds after you see the lightning?

Answer:

3(m+8)

Step-by-step explanation:

first you add m to 8, so you would do m+8. then you triple that, means multiply it by 3. so 3(m+8)

Answer:

(m+8)^3=m^3+512

Step-by-step explanation:

Answer: Well, when the wise man said "500 reduced by 4 times my age is 200." A wise women came up to him and responded " Your age is 75"

Step-by-step explanation:

If 500 reduced by 4 times your age is 200, then the equation

500 − 4x = 200

Take away 200 from both sides of the equation.

Add 4x to both sides of the equation.

Divide both sides of the equation by 4, you get 75 = x.

So, if 500 reduced by 4 times your age is 200, then you are 75.

Answer:

Step-by-step explanation:

let the age of old man be x

given word problem in equation form=

500-4x=200

500-200=4x

300/4=x

75=x

Answer:

pizzas eaten =2/7 x 20

5 5/7 pizzas have been eaten

Step-by-step explanation:

pizzas eaten = 2/7 x 20

40 / 7 = 5 5/7

Answer:

B

Step-by-step explanation:

Answer:

d don't know how to explain it but i think its d

Answer:

d

Step-by-step explanation:

Answer:

z will be11

11z = 121

z = 121/11

z= 11

Answer:

1=121= 11

Step-by-step explanation:

Step-by-step explanation:

One juice and to sandwiches cost $70.00. One juice and four sandwiches cost $130.00.

What is the cost of one sandwich?

Answer:

One sandwich costs $30

One juice costs $10

Answer:

D) (x-6)(x-4)

Step-by-step explanation:

(x-6)(x-4)=x^2-6x-4x+24=x^2-10x+24

Answer:

0

Step-by-step explanation:

Answer:

0.315 times

Step-by-step explanation:

156÷495 ≈ 0.315

Have a good day :)

Answer:

2

Step-by-step explanation:

Answer:

Step-by-step explanation:

I'm going to guess that the square  exponents are on the top y's   only?   then answer b) looks good

Answer:

b. y^2 = -12x

Step-by-step explanation:

The general form for  the given parabola is y^2 = -4ax where the focus is at (-a, 0). The focal width is 4a which in this case = 12.

Answer:

2( 2x - y ) -4( x - y ) +3y

4x - 2y - 4x + 4y + 3y

-2y + 4y + 3y

-2y +7y

5y

Answer:

[tex]\displaystyle x \approx 9.2[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Trigonometry

Step-by-step explanation:  

Step 1: Define

Angle θ = 35°

Opposite leg = x

Hypotenuse = 16

Step 2: Solve for x

Answer:

A) -3±√33 / 8

Step-by-step explanation:

y = -8x²+6x+3

x = -b±√(b²-4ac) / 2a

x = -(6)±√((6)²-4(-8)(3)) / 2(-8)

x = -6±√(36+96) / -16

x = -6±√(132) / -16

x = -6±2√33 / -16

x = -3±√33 / 8

Answer:

The percentage error in her guess is 5%.

Step-by-step explanation:

60 - 57 = 3

3/60 = 0.05

9514 1404 393

Answer:

  $735

Step-by-step explanation:

We assume the cover needs to cover the pool only, not any extra area around the pool.

The cost is given per square foot, so to find the total cost, we need to know how many square feet the cover must cover. The cost will be found by multiplying the cost per square foot by the number of square feet.*

The dimensions of the pool are given as 35 ft by 70 ft. The pool area is the product of these dimensions.

  A = LW

  A = (70 ft)(35 ft) = 2450 ft²

Then the cost is ...

  C = ($0.30/ft²)(2450 ft²) = $735

The cost to buy a pool cover is $735.

__

* This is the same rule you use for any purchase. The total cost is the cost per item multiplied by the number of items. Here, each "item" is 1 square foot of pool cover.

Answer:

29.6

Step-by-step explanation:

Answer:

It's undefined since it's a vertical line.

Step-by-step explanation:

Answer:

5.5 is the correct answer:)

Step-by-step explanation:

Hope this helped!!!

9514 1404 393

Answer:

  D.  14

Step-by-step explanation:

Point G divides each median into parts that have the ratio ...

  short : long = 1 : 2

Then ...

  GD : GC = 1 : 2 = 7 : 14 . . . . . . . . multiply the ratio by 7

GC = 14

Answer:

x = 20

y = 30

Step-by-step explanation:

Answer:

x = 20

y = 30

Step-by-step explanation:

y = 3x - 30

2x + 2y = 100

2x + 2(3x - 30) = 100

2x + 6x - 60 = 100

8x - 60 = 100

8x = 160

x = 20

y = 3(20) - 30

y = 60 - 30

y = 30

Answer: [tex]3\times \dfrac{P}{3}=P[/tex]

Step-by-step explanation:

Given

The perimeter of one equilateral triangle is P

The lengths of the equilateral triangle are equal

Suppose x is the length of each side

[tex]\therefore 3\times x=P\\\\\Rightarrow x=\dfrac{P}{3}[/tex]

i.e.

[tex]\Rightarrow 3\times \dfrac{P}{3}=P[/tex]

Answer:

Step-by-step explanation:

Rewrite this in standard quadratic equation form:  x^2 - 7x +  6 + 8 = 0, or x^2 - 7x + 14 = 0.  This does not factor easily, so I will use the quadratic formula to find the roots and then write out the factors based upon the roots:

The discriminant is b^2 - 4ac, which here is (-7)^2 - 4(1)(14) = -7.

Because the discriminant is negative, we know that there are two unequal, complex roots.  They are:

      -(-7) ± i√7         7 ± i√7

x = ----------------- = ---------------

              2                     2

One factor is (x - [1/2]{7 ± √7}  )

Answer:

9^5

Step-by-step explanation:

are u from india ??????????

Answer:

The original fraction is [tex]\frac{2}{5}[/tex]

Step-by-step explanation:

Let the numerator by X

Denominator is three more than its numerator i.e X +3

When both the numerator and denominator are increased by one the fraction becomes 1/2

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

Thus, numerator = 2

Denominator = X +3 = 2+3 = 5

The original fraction is [tex]\frac{2}{5}[/tex]

Answer:

21/40

Step-by-step explanation:

in one minutes Kate can read :

7/5 × 3/8 = 21/40 pages

7/5 × 3/8 = 21/40

Good Luckkkkkkk

Answer:

Step-by-step explanation:

We can immediately assume that the answer is either the first or third one based off of the second statement. A product is the result of multiplication, and if you see a number and letter together like in the first and third answers, it means they are to be multiplied. For example, 2a = 2 x a. With the first statement, there are 2 terms in all of the equations so that's no help, but the word sum is the result of addition. In which all two terms are added, so . . . also no help. :( Now the last statement. The thing that will conclude all of your questions. A quotient is the result of division, and it's supposed to be between b and 4. As we can see, in the third equation, they subtract b and 4. That's not division! So that leaves us with one answer. The first equation. . .

Answer:

Step-by-step explanation:

h = -6[tex]t^{2}[/tex] +20t + 4

I will use calculus,  maybe that's not how you're supposed to do this

-12t +20 =0

12t = 20

t = 20 /12

t = 1 [tex]\frac{8}{12}[/tex]

t = 1 [tex]\frac{2}{3}[/tex]

there will be a max at  1.6666666666  seconds

-6*[tex]1.6666666666666^{2}[/tex]  + 20 * 1.6666666666  +4

= 16.666666666666 + 33.333333333333 + 4

= - 16[tex]\frac{2}{3}[/tex] + 33 [tex]\frac{1}{3}[/tex] + 4

= 20[tex]\frac{2}{3}[/tex]  feet max height ( not too high,  for a rocket)

time of flight:

0 = -6[tex]t^{2}[/tex] +20t + 4

use quadratic formula to find t

-20 +- sqrt [ [tex]20^{2}[/tex] - 4*(-6)*4 ] / 2*(-6)

-20 +- sqrt [400 + 96 ] / -12

-20 +- sqrt [496 ] / -12

-20 +- 22.27105 / -12

try the negative option 1st

-42.27105 / -12

3.522 seconds.     time of flight

when will the rocket be at 12' ? :

12 = -6[tex]t^{2}[/tex] +20t + 4

0 = -6[tex]t^{2}[/tex] +20t -8

use quadratic formula again to find t

-20 +- sqrt [ [tex]20^{2}[/tex] - 4*(-6)*(-8) ] / 2*(-6)

-20 +- sqrt [ 400 - 192 ] / -12

-20 +- sqrt [208 ] / -12

-20 - 14.4222 / -12

-34.4222 / -12

2.8685 seconds ( on the way down)

and

-20 + 14.4222 / -12

-5.578 / - 12

0.4648  seconds ( on the way up )

Answer:

Triangle A and B

Step-by-step explanation:

Both triangles have two same angles.

If Triangle A is rotated like Triangle B, they would be the same.

Vice versa, if Triangle B is rotated like Triangle A, it would be the same.

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K