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Dahasolnce [82]
3 years ago
7

please help me with these two problems PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE PLEASE ​

Mathematics
1 answer:
lisov135 [29]3 years ago
4 0
You can use Math-way for problems like this !! ... it’s an app it’s good for giving you answers on math equations
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Which statement about the following equation is true?<br>2x2-9x+2-1​
Furkat [3]

Complete Question:

Which statement about the following equation is true?

2x^2-9x+2 = -1

A) The discriminant is less than 0, so there are two real roots

B) The discriminant is less than 0, so there are two complex roots

C) The discriminant is greater than 0, so there are two real roots

D) The discriminant is greater than 0, so there are two complex roots

Answer:

C) The discriminant is greater than 0, so there are two real roots

Step-by-step explanation:

The given equation is 2x^2-9x+2 = -1 which by simplification becomes

2x^2 - 9x + 3 = 0

For a quadratic equation of the form ax^2 + bx + c = 0, the discriminant is given by the equation, D = b^2 - 4ac

If the discriminant D is greater than 0, the roots are real and different

If the discriminant D is equal to 0, the roots are real and equal

If the discriminant D is less than 0, the roots are imaginary

For the quadratic equation under consideration, a = 2, b = -9, c = 3

Let us calculate the discriminant D

D = (-9)² - 4(2)(3)

D = 81 - 24

D = 57

Since the Discriminant D is greater than 0, the roots are real and different.

3 0
3 years ago
A satellite orbits Earth at a rate of about 3,300 miles in 12 minutes. At this​ rate, how far does the satellite travel around E
Vaselesa [24]
16,500

60 minutes in an hour / 12 minutes = 5
5 * 3,300 = 16,500
7 0
3 years ago
Read 2 more answers
Help...(MATH).......
Hitman42 [59]

If f(x) = √x and g(x) = 7x + b, then

f(g(x)) = f(7x + b) = √(7x + b)

If the plot of f(g(x)) passes through (4, 6), then

f(g(4)) = √(7•4 + b) = √(28 + b) = 6

Solve for b :

√(28 + b) = 6

(√(28 + b))² = 6²

28 + b = 36

b = 36 - 28

b = 8

7 0
2 years ago
What is the image of the point (5, -3) after a reflection over the line y = x?
Musya8 [376]

Answer:

(-3,5)

Step-by-step explanation:

If the slope of y=x is 1, then you have to reflect over that line with a negative slope. It should reflect over to be (-3,5).

4 0
2 years ago
Question and choices are in the photo please explain the answer
Zanzabum
The answer for this one is option B.
The angle between two tangents and angle at the center are supplementary (adds up to 180⁰).
3 0
3 years ago
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