All categories

2 years ago

How many x-intercepts does the graph of y = 2x^2 + 5x +9 have?

Mathematics

1 answer:

Pepsi [2]2 years ago

7 0

Answer:

Step-by-step explanation:

y = 0 at the point where the function intersects x-axis. Thus, yiou have to put

2x2 + x - 10 = 0

and solve the equation. It is better to factor the quadratic expression, which gives us

2x2 + x - 10 = (2x+5)(x-2) = 0

We have 2x +5 = 0 and x-2 = 0. Thus, the intercepts are x = -5/2 = - 2.5 and x = 2.

Read more on Brainly.com - brainly.com/question/12158546#readmore

You might be interested in

Jaime put 3 oranges on each tray how many oranges does he put on 5 trays

goblinko [34]

Jamie puts 15 on 5 trays

8 0

2 years ago

Read 2 more answers

Question in Picture vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv

Crank

Answer:

Angle BOC = 28; Angle AOB = 21

Step-by-step explanation:

Because angle AOC = AOB + BOC you can set the equation:

2x+10 + 4x-15 = 49

6x - 5 = 49

6x = 54

x= 9

BOC = 2(9) +10 = 28

AOB = 4(9) - 15 = 21

6 0

3 years ago

2(4x + 1) - 3(5x - 1) expand and simplify

Temka [501]

Answer:
-7x + 5

Step-by-step explanation:

2(4x + 1) - 3(5x - 1)

8x + 2 - 3(5x-1)
8x + 2 - 15x + 3
8x + 5 - 15x
-7x + 5

Hope it helped !
Adriel

6 0

1 year ago

It’s geometry, help plz

m_a_m_a [10]

Answer:

i think its 18(DONT TRUST ME)

Step-by-step explanatioN:

6 x 3

5 0

2 years ago

For f(x)=1/x^2-3, find a) f(3) b) f(2+h) Show/explain work

valentina_108 [34]

$f(x)=\dfrac{1}{x^2-3}\\\\a)\ f(3)\to\text{put x=3 to the equation of the function f}\\\\f(3)=\dfrac{1}{3^2-3}=\dfrac{1}{9-3}=\dfrac{1}{6}\\\\Answer:\ \boxed{f(3)=\dfrac{1}{6}}\\\\b)\ f(2+h)\to\text{put x=2+h to the equation of a function f}\\\\f(2+h)=\dfrac{1}{(2+h)^2-3}\ \ \ |\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\=\dfrac{1}{2^2+2(2)(h)+h^2-3}=\dfrac{1}{4+4h+h^2-3}=\dfrac{1}{h^2+4h+1}\\\\Answer:\ \boxed{f(2+h)=\dfrac{1}{h^2+4h+1}}$

6 0

3 years ago