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VLD [36.1K]
3 years ago
9

Do the functions have the same concavity? f(x)=2x^2-10x-30

Mathematics
2 answers:
kumpel [21]3 years ago
5 0

Answer:

Use the inflection points to set up intervals. Substitute a value into each interval to find where the curve is concave up or down.

The graph is concave up

Gnom [1K]3 years ago
4 0

Answer:

Step-by-step explanation:

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Easy math please help i'll mark brainliest
katen-ka-za [31]

Answer:

D, D, A, C

Step-by-step explanation:

Congruent means equal.

T and r are alternate angles

Vertically opposite angles are equal

Y is 47 degrees because since the full angle is 90 degrees, subtract:

90-43 = 47

Hope this helps :)

-jp524

5 0
3 years ago
Read 2 more answers
option 1 drop down are: even-odd identity, quotient identity, Pythagorean identity, double-number identity.option 2 drop down ar
motikmotik

Answer:

The equation is given below as

\frac{\cos2x}{\cos x}=\cos x-\sin x\tan x

Step 1:

We will work on the left-hand side, we will have

\begin{gathered} \cos x-\sin x\tan x \\ \text{recall that,} \\ Quoitent\text{ identity is} \\ \tan x=\frac{\sin x}{\cos x} \end{gathered}

By substituting the identity above, we will have

\begin{gathered} \cos x-\sin x\tan x=\cos x-\frac{\sin x.\sin x}{\cos x}=\cos x-\frac{\sin^2x}{\cos x} \\  \end{gathered}

Here, we will make use of the quotient identity

Step 2:

By writings an expression, we will have

\begin{gathered} \cos x-\sin x\tan x=\cos x-\frac{\sin x.\sin x}{\cos x} \\ \cos x-\sin x\tan x=\frac{\cos^2x-\sin^2x}{\cos x} \end{gathered}

Here, we will use the definition of subtraction

\cos x-\frac{\sin^2x}{\cos x}

Step 3:

We will apply the double number identity given below

\begin{gathered} \cos 2\theta=\cos (\theta+\theta)=\cos ^2\theta-\sin ^2\theta \\ \cos 2x=cos(x+x)=\cos ^2x-\sin ^2x \end{gathered}

By applying this, we will have

\frac{\cos^2x-\sin^2x}{\cos x}=\frac{\cos2x}{\cos x}

Here, we will use the double number identity

\frac{\cos^2x-\sin^2x}{\cos x}

5 0
1 year ago
Stella models a product with algebra tiles. Write a number sentence that best describes her model. Fill in the blanks.
Kamila [148]

Answer:

Sorry i dont understand

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Write the set of real numbers x less than 6 in set builder notation
maksim [4K]

Answer:

{x ∈ R: x<6}

Step-by-step explanation:

Given

  • x is a real number
  • x is less than 6

Required

Write the set using set builder notation

The very first thing to do is to list out the range of x, using inequalities;

x is less than 6 implies that -infiniti < x < 6

The next step is to translate this to set builder. This is done as follows

x ∈ R - > This means that x is a real number

x < 6 -> where x is less than 6.

Bringing these two together, it gives:

{x ∈ R: x<6}

Hence, the set of real numbers x less than 6 is equivalent to {x ∈ R: x<6} using set builder notation

6 0
3 years ago
Ted spent half of his weekly allowance playing arcade games. To earn more money his parents let him wash the car for $7. What is
GalinKa [24]

Answer:

14?

Step-by-step explanation:

well if he spent half that means 14 - 7 = 7

7 + 7 is fourteen soooo im pretty sure its 14 yw

8 0
3 years ago
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