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Oksi-84 [34.3K]
3 years ago
8

Identify the independent and dependent variables. The equation A=25w gives the area A (in square feet) of a rectangular dance fl

oor with a width of w feet.
Mathematics
1 answer:
kozerog [31]3 years ago
7 0

Answer:

The dependent variable is A

The independent variable is w

Step-by-step explanation:

Given

A = 25w

Required

Identify the variables

In A = 25w

The value of w is independent of the value of A.

In other words:

A derive its own value from w; by multiplying 25 and w.

Take for instance:

w = 3

The value of A would be:

A = 25 * 3

A = 75

Hence:

The dependent variable is A

The independent variable is w

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Solve by completing the square​
erastovalidia [21]

Answer:

Your answers would be:

x = 10 and x = -8

Step-by-step explanation:

Solve for the zeros:

x² - 2x - 78 = 2

Subtract both sides by 2.

x² - 2x - 80 = 0

Use the quadratic formula: x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

a = 1

b = -2

c = -80

Plug in and solve:

x=\frac{-(-2)\pm\sqrt{(-2)^2-4(1)(-80)}}{2(1)}\\\\x=\frac{2\pm\sqrt{(-2)^2-4(1)(-80)}}{2(1)}\\\\x=\frac{2\pm\sqrt{4-4(-80)}}{2(1)}\\\\x=\frac{2\pm\sqrt{4+320}}{2(1)}\\\\x=\frac{2\pm\sqrt{324}}{2(1)}\\\\x=\frac{2\pm18}{2}\\

Solve for +:

x=\frac{2+18}{2}\\\\x=\frac{20}{2}\\\\x=10

Solve for -:

x=\frac{2-18}{2}\\\\x=\frac{-16}{2}\\\\x=-8

5 0
3 years ago
What percent is 248?
denis23 [38]
248 as a percent is 24800%.  Just multiply by 100 and add a % sign
3 0
3 years ago
Eight less than four times a number is the same as 13 more than the number. What is the number?
Bas_tet [7]
4n - 8 = n + 13
4n - n = 13 + 8
3n = 21
n = 21/3
n = 7....the number(n) = 7
6 0
4 years ago
A sum of money is divided amongst Rony, Lisa and Tulip in the ratio 10: 7: 5. If
vova2212 [387]

Answer:

$62.85

Step-by-step explanation:

Given data

ratio=  10: 7: 5

Total ratio= 10+7+5= 22

Lisa= $20

Her proportion of the ratio = 7

Applying the part to all method

Let the total amount shared be x

7/22= 20/x

cross multiply

7x= 22*20

7x= 440

divide both sides by 7

x= 440/7

x= 62.85

7 0
3 years ago
Solve for the value of x - <br><br>5(4x-4)=5(3x+3)​
sattari [20]
<h2>Solve the equation:- </h2>

5(4x - 4) = 5(3x + 3) \\  \cancel5(4x - 4) = \cancel5(3x + 3) \\ (4x  - 4) = (3x + 3) \\ 4x - 3x = 4 + 3 \\ x = 7

<h2>Verification:- </h2>

Put the value of X in equation:-

LHS:-

5(4x - 4) = 5(4(7) - 4) \\ 5(28 - 4) \\ 5(24) = 120

RHS:-

5(3x  + 3) = 5(3(7) + 3) \\ 5(21 + 3)  \\  5(24)  =  120

LHS= RHS

Hence proved

5 0
3 years ago
Read 2 more answers
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