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lawyer [7]
2 years ago
13

Please solve this quadratic equation:3^2x -9 =0​

Mathematics
1 answer:
Basile [38]2 years ago
4 0

Answer:

{3}^{2} x - 9 = 0 \\ 9x = 9 \\ x = 1

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Select all the correct systems of equations. Which systems of equations have infinite solutions? 2x + 5y = 31 6x - y = 13 y = 14
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Answer:

The system of equations y=14-2x and 6x+3y=42.

Step-by-step explanation:

Please see attachment to see the answer as a graph.

Hope this helps!

6 0
1 year ago
Given f(x) = –5x + 1, what is f(–2)?
DiKsa [7]
F(x) = -5x + 1

f(-2) = -5(-2) + 1
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f(-2) = 11

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Answer: f(-2) = 11 (Answer C)
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A bag contains 16 blue marbles,8 green marbles and 12 red marbles. What is the ratio of blue to green to red marbles in its simp
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Answer:

4:2:3

Step-by-step explanation:

16 blue marbles,8 green marbles and 12 red marbles.

Ratio of blue to green to red

blue:green:red

16:8:12

We can divide each term by 4

16/4:8/4:12/4

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4 0
3 years ago
Connor is painting a superhero with this belt buckle shown. What is the area of the belt buckle in square Inches? 9 inches 2.5 i
antoniya [11.8K]

Answer:

87.5 square inches

Step-by-step explanation:

The belt knuckle as shown in the diagram above consist of a 4 rectangles (2 are the of the same dimension, the other two are of the same direction differently) and a rectangle.

Area of the belt knuckle = area of the 4 triangles + area of the rectangle

✔️Area of the 2 rectangles with the following dimensions:

base (b) = 9 inches

height (h) = 2.5 inches

Area of the two triangles = 2(½*b*h)

= 2(½*9*2.5)

= 22.5 inches²

✔️Area of the 2 rectangles with the following dimensions:

base (b) = 4 inches

height (h) = 5 inches

Area of the two triangles = 2(½*b*h)

= 2(½*4*5)

= 20 inches²

✔️Area of the rectangle = l*w

l = 9 inches

w = 5 inches

Area = 9*5 = 45 inches²

✔️Area of the belt knuckle = 22.5 + 20 + 45 = 87.5 square inches

3 0
2 years ago
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