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aniked [119]
3 years ago
5

The difference of the square of a number and 12 is equal to 4 times that number. Find

Mathematics
1 answer:
MrMuchimi3 years ago
8 0

Answer: -2

Step-by-step explanation: Let the unknown number be " a"

From the statement,

a^2 - 12 = 4a ..... this is a quadratic equation

i.e  a^2 - 4a - 12 = 0

factorizing the quadratic expression

( a + 2 ) ( a - 6 ) = 0

i.e a = -2 or 6

so, the negative solution is -2

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solve this system using a systems of equations. Discount Rental Cars charges a daily fee plus a mileage fee for renting its cars
kipiarov [429]

Answer:

Barney 145 3 Days 310 Miles

Mary   250 5 Days 600 Miles

A)  3 D + 310 M = 145

B) 5 D + 600 M = 250

Multiplying A) by -5/3

A) -5 D - 516.6666M = -241.66666666

B) 5D + 600M = 250

Adding A) and B)

83.3333 M = 8.3333333333

M = .10 per mile

3 D = 114

Daily Rate = 38 dollars per day

Step-by-step explanation:

3 0
4 years ago
How to do this question plz answer ​
weeeeeb [17]

9514 1404 393

Answer:

  102

Step-by-step explanation:

The total of ratio units is ...

  6 + 3 + 8 = 17

The difference between the Charlie's ratio units and Adrian's ratio units is ...

  8 - 6 = 2

That is, the total number of ratio units is 17/2 = 8.5 times that difference.

The actual difference is 12 sweets, so the total number of sweets is ...

  8.5 × 12 = 102 . . . . total sweets

4 0
3 years ago
Quadrilateral ABCD has the following vertices: A(-4, -3), B(2, -3), C(4, -6), and D(-4, -6). Quadrilateral ABCD is a
seropon [69]
In order to get the figure, you have to plot it.

Quadlirateral ABCDwith <span>vertices: A(-4, -3), B(2, -3), C(4, -6), and D(-4, -6) is </span>s A. TRAPEZOID
6 0
3 years ago
Read 2 more answers
jerry has 60 coins consisting of quarters and dimes. The coins combined value is $9.45. Find out how are quarters and how many a
jekas [21]
Eq. 1 .10x + .25y = 9.45
Eq. 2 x + y = 60 rewrite as x = 60 - y and substitute into equation 1.

.10(60 - y) + .25y = 9.45
6 - .1y + .25y = 9.45
6 + .15y = 9.45
.15y = 3.45
y = 23
60 - 23 = 37

23 quarters
37 dimes


23* .25 = 5.75
37 * .1 = 3.70
5.75 + 3.70 =9.45
7 0
3 years ago
You use pemdas and they both equal to 77. So yes they are equivalent.
spayn [35]

Answer:

yes if u use Pemdas and both sides of the equation have the same answer, they both are equivalent.

Good job!

7 0
3 years ago
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