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katen-ka-za [31]
2 years ago
10

Evaluate the expression when x = 9.2 and y = 3.4. 5xy

Mathematics
1 answer:
Elden [556K]2 years ago
7 0
The answer is 156.4

5(9.2)(3.4)
156.4
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Write an equation of the ellipse with foci at (0,+12) and vertices at (0,+13)
Musya8 [376]

Answer:

Quadratic relations and comic sections unit test part 1

10. b. x^2/25 + y^2/169 =1

Step-by-step explanation:

7 0
3 years ago
3(0.7z+2.8)=7(1.5z+7.2)
AnnZ [28]

Answer:

z = -5

Step-by-step explanation:

3(0.7z + 2.8) = 7(1.5z + 7.2)

2.1z + 8.4 = 10.5z + 50.4

2.1z - 10.5z = 50.4 - 8.4

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7 0
3 years ago
determine the equation of the circle if its center is (8,-6) and which passes through the points (5,-2).
ser-zykov [4K]

Answer:

(x - 8)² + (y + 6)² = 25

Step-by-step explanation:

The equation of a circle in standard form is

(x - h)² + (y - k)² = r²

where (h, k ) are the coordinates of the centre and r is the radius

Here (h, k ) = (8, - 6 ) , then

(x - 8)² + (y - (- 6))² = r² , that is

(x - 8)² + (y + 6)² = r²

The radius is the distance from the centre to a point on the circle

Calculate r using the distance formula

r = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = (8, - 6 ) and (x₂, y₂ ) = (5, - 2 )

r = \sqrt{(5-8)^2+(-2-(-6))^2}

  = \sqrt{(-3)^2+(-2+6)^2}

  = \sqrt{9+4^2}

  = \sqrt{9+16}

   = \sqrt{25}

   = 5

Then equation of circle is

(x - 8)² + (y + 6)² = 5² , that is

(x - 8)² + (y + 6)² = 25

6 0
2 years ago
Evaluate the expression. 2.15(3)2
Jet001 [13]

Answer: 12.9

Step-by-step explanation: When any number is in parenthesis, you multiply it by the other numbers/variables.

7 0
2 years ago
Read 2 more answers
Solve the equation. −4(−6)=12
nalin [4]

Answer:

24=12 or false

Step-by-step explanation:

6 0
3 years ago
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