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GaryK [48]
3 years ago
12

How many x-intercepts does the graph of y = 2x^2 – 8x + 5 have?

Mathematics
2 answers:
nydimaria [60]3 years ago
8 0
A graph of the equation shows the appropriate choice to be
  C. 2

_____
If you would rather, you can look at the value of the discriminant. For the equation y = ax²+bx+c, the discriminant (d) is
  d = b²-4ac
For your equation, this evaluates to
  d = (-8)²-4(2)(5) = 64 -40 = 24
When the discriminant is positive, the function has two real roots (2 x-intercepts). When it is zero, there is only one x-intercept, and when it is negative, there are none (the roots are complex).

MatroZZZ [7]3 years ago
8 0

Answer:

2

Step-by-step explanation:

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45:30
Ierofanga [76]
The answer is 50 y squared minus 4 x squared
5 0
3 years ago
Read 2 more answers
1) check if they given ordered pairs are solutions to the equation or not.
ziro4ka [17]
Answer: a) Yes
b) No


Explanation: Substitute the values of X and Y from the given points into the equation. I’ll use a) as an example:
Given point: (1,-3)
Equation: 4x-2y=10
Value of X: 1
Value of Y: -3
Substitute X and Y: 4(1)-2(-3)=10
4-(-6)=10
4+6=10 ✔︎

Therefore, the given ordered pair is a proper solution to the equation 4x-2y=10.

*You can use the same method for question b).*
3 0
3 years ago
Are y = 1/4 -2 and y = 1/4 + 2 parallel?
zhenek [66]

Answer:

yes because the slope is equal. so these two lines are parallel.

3 0
3 years ago
3х2 = 147<br> Solve by undoing
Dmitry_Shevchenko [17]

Answer: +/- 7

Step-by-step explanation:

3x² = 147

To solve for x divide through by three first.

3x² = 147

x² = 49, now we take the square root of both side by trying to apply laws of indices.

√x² = √49

The square root will neutralize the effect of the square because

√a = a¹/² so (x²)¹/², and (x²)¹/² =

x²×¹/² = x, therefore the solution is

x = +/- 7.

3 0
3 years ago
What is the measure of angle 2?
Darya [45]

Answer:

42

Step-by-step explanation:

because that angle is a little less than half of 90 so 42 is the best answer

5 0
3 years ago
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