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2 years ago

Let f(x)=x2+3x−10. Enter the x-intercepts of the quadratic function in the boxes. x = and x =

Mathematics

1 answer:

SIZIF [17.4K]2 years ago

3 0

Answer:

X= 2.

X= -5.

Step-by-step explanation:

Hope it was helpful ;)

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Please explain your answer. THX!

Elden [556K]

Answer:

see explanation

Step-by-step explanation:

(3)

Given cosΘ = - $\frac{4}{5}$

Then by Pythagoras' theorem the third side is 3 ( 3,4, 5 triangle )

Since Θ in second quadrant then sinΘ > 0

sinΘ = $\frac{3}{5}$

Using the trigonometric identity

sin2Θ = 2sinΘcosΘ, then

sin2Θ = 2 × $\frac{3}{5}$ × - $\frac{4}{5}$ = - $\frac{24}{25}$

(4)

Using the trigonometric identity

cos(x - y) = cosxcosy + sinxsiny

note cos15° = cos(45 - 30)°

cos(45 - 30) = cos45cos30 + sin45sin30

= ( $\frac{\sqrt{2} }{2}$ × $\frac{\sqrt{3} }{2}$ ) + ( $\frac{\sqrt{2} }{2}$ × $\frac{1}{2}$ )

= $\frac{\sqrt{2(\sqrt{3}+1) } }{4}$

4 0

3 years ago

a father is 24years older than his son. if the son is x years old, how old is the father and if the ratio of their ages is 5:2,

yan [13]

x+25/x=5/2

5x=2(x+24) 5x=2x+48

5x-2x=48

3x=48 3x/3=48/3

the age of son=16

father=24+x 24+16=40

F=40 s=16

40/16=5:2

6 0

3 years ago

Find the arc length, x, when r= 8 and 0 = 5 radians.

lys-0071 [83]

Answer:

Arc Length = 40

Step-by-step explanation:

Arc Length Formula: S = rΘ

R = radius

Θ = Radians

Step 1: Identify the radius and the radian angle

R = 8

Θ = 5 radians

Step 2: Plug into the equation

S = (8)(5)

Step 3: Solve

S = 40

Answer: Arc Length = 40

7 0

3 years ago

Select all expressions that are equivalent to 5x + (x+6) + 3x.

liraira [26]

The correct answer is 9x+6.

5 0

3 years ago

Read 2 more answers

I am a square. One of my side is 9 feet long. What is my area?

Stella [2.4K]

Hello from MrBillDoesMath!

Answer:

81 ft^2

Discussion:

The area of a square is (length of a side)^2. In this case,

Area = 9^2 = 81

Regards,

MrB

P.S. I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!

8 0

3 years ago

Let ​f(x)=x2+3x−10​. Enter the x-intercepts of the quadratic function in the boxes. x = and x =

Let f(x)=x2+3x−10. Enter the x-intercepts of the quadratic function in the boxes. x = and x =