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zhannawk [14.2K]
3 years ago
5

Please help, I dont know how to do it

Mathematics
1 answer:
barxatty [35]3 years ago
5 0
Nadine does not use (variables).
The operations Nadine uses are the (same as) the operations Shay uses.
They use the operations in (same) order.
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If x + y = 10 and x - y = 4, find the value of x² - y²
morpeh [17]

Answer:

x²-y² = 40

Step-by-step explanation:

Factorising x²-y²:

x²-y² = (x+y)(x-y)

This is due to the property that states:

a²+b² = (a+b)(a-b)

Substituting the given values into the above equation:

x²-y² = (10)(4)

= 40

Hence, x²-y² = 40

<em>Hope this helps and be sure to have a wonderful time ahead at Brainly! :D</em>

8 0
2 years ago
Read 2 more answers
Fint the center circle with these coordnates (10,3)(3,10)and(-4,3
omeli [17]
The length of the line joining the center of the circle and each coordinate is equal.
Let the center of the circle be (a, b), then
(a - 10)^2 + (b - 3)^2 = (a - 3)^2 + (b - 10)^2 = (a + 4)^2 + (b - 3)^2
a^2 - 20a + 100 + b^2 - 6b + 9 = a^2 - 6a + 9 + b^2 - 20b + 100 = a^2 + 8a + 16 + b^2 - 6b + 9

a^2 - 20a + 100 + b^2 - 6b + 9 = a^2 - 6a + 9 + b^2 - 20b + 100 . . . (1)
a^2 - 20a + 100 + b^2 - 6b + 9 = a^2 + 8a + 16 + b^2 - 6b + 9 . . . (2)

From (1): 14a - 14b = 0 => a = b
From (2): 28a = 84 => a = 84/28 = 3

Therefore, center = (a, b) = (3, 3)
4 0
3 years ago
A park is rectangular with a length of 12 miles. If the area of the park is 68 square miles, what is its width? Input your answe
Veronika [31]

Answer:

17/3

Step-by-step explanation:

to find out the width, we need to divide the area by the length.

68/12=5.666666667

fraction form: 17/3 (5 2/3)

4 0
2 years ago
The relationship between a distance in yards (y) and the same distance in miles (m) is described by the equation y=1760m. Is the
miss Akunina [59]

Answer:

y ∝ m and 1760 is a constant of proportionality.

Step-by-step explanation:

The relation between a distance in the yards (y) and the same distance in miles (m) is described by the equation y = 1760m.

So, the graph of the above equation passes through the origin(0,0) and it will be a straight line with a constant slope of 1760.

Therefore, a measurement in yards and a measurement in miles are in the relation of proportionality for the same distance.

Hence, y ∝ m and 1760 is a constant of proportionality. (Answer)

6 0
3 years ago
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When in standard form, what is the value a, b, and c in this quadric<br> 8x^2+3x-6=3x
borishaifa [10]

Answer:

a=8, b=0 and c=-6

Step-by-step explanation:

see pic for expln

8 0
2 years ago
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