Question

2. Fill in the blanks:-
1. The value of f(x) = 5x - 4x2 + 3 when x = -1 is........
2. If x coordinate of a point is zero, then the point lies on........
3. The solution of equation x-2y=4 is........
4. A straight angle is equal to..........
5. The angles opposite to equal sides of a triangle are..........​

Answer 1

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1. The value of f(x) = 5x - 4x2 + 3 when x = -1 is

➜ x= -1

f(-1) = 5x - 4x² + 3

= -4x²+5x+3

= -4(-1)²+5(-1)+3

= -4-5+3

= -9+3

= -6

2. If x coordinate of a point is zero, then the point lies on y coordinate.

3. The solution of equation x-2y=4 is

➜ x-2y=4

-2y = 4-x

-y = $\frac{4 - x}{2}$

4. A straight angle is equal to 180°

5. The angles opposite to equal sides of a triangle are 90°

Answer 2

Answer:

1. 2

2. on Y axis

3. Sorry I don't know

4. 180°

5. equal

Step-by-step explanation:

1. f(x) = 5x - 4x2 + 3

f(-1) = 5(-1)-4(-1)²+3

f(-1) = -5 -4 +3

f(-1) = -9 +3

f(-1) = -6

2. O(x,y)

if x = 0 then then O point is on Y axis

3. sorry I am unable to attempt

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