1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hodyreva [135]
3 years ago
8

F(x)=4x^2-7x+7 Find f(7)

Mathematics
1 answer:
harkovskaia [24]3 years ago
8 0

Answer:

154

Step-by-step explanation:

Because since it says find f(7) you plug the 7 into the x's so it would be...

4(7)^2-7(7)+7= 154

You might be interested in
The wholesale price for a shirt is 3.50 A certain department store marks up the wholesale price by 90% Find the price of the shi
NemiM [27]

Answer:

$6.65

$6.65

$6.65

6 0
3 years ago
[14 POINTS AND BRAINLIST ❗️]
julsineya [31]

Answer:

d

Step-by-step explanation:

6 0
3 years ago
How to do foils in algebra
Leno4ka [110]
Foils stands for first, outer, inner, last.

For example:

(3x + 5)(2x + 3)

Multiply the firsts together.

3x * 2x = 5x²

Now multiply the outer together.

3x * 3 = 9x

Now multiply the inners.

5 * 2x = 10x

Now multiply the lasts.

5 * 3 = 15

so the answer would be:

5x² + 9x + 10x + 15
5x² + 19x + 15


Hope this helps :)

8 0
2 years ago
The cost price of a car is $60 000. If the marked price is set so as to make a profit of 15%, find the
blsea [12.9K]

Answer:

marked price = $69,000

Step-by-step explanation:

cost price = $60,000

profit

= 15%

= 15% × cost price

= 15/100 × $60,000

= $9000

marked price

= cost price + profit

= $60,000 + $9000

= $69,000

3 0
2 years ago
Consider the differential equation x2y′′ − 9xy′ + 24y = 0; x4, x6, (0, [infinity]). Verify that the given functions form a funda
pantera1 [17]

Answer:

The functions satisfy the differential equation and linearly independent since W(x)≠0

Therefore the general solution is

y= c_1x^4+c_2x^6

Step-by-step explanation:

Given equation is

x^2y'' - 9xy+24y=0

This Euler Cauchy type differential equation.

So, we can let

y=x^m

Differentiate with respect to x

y'= mx^{m-1}

Again differentiate with respect to x

y''= m(m-1)x^{m-2}

Putting the value of y, y' and y'' in the differential equation

x^2m(m-1) x^{m-2} - 9 x m x^{m-1}+24x^m=0

\Rightarrow m(m-1)x^m-9mx^m+24x^m=0

\Rightarrow m^2-m-9m+24=0

⇒m²-10m +24=0

⇒m²-6m -4m+24=0

⇒m(m-6)-4(m-6)=0

⇒(m-6)(m-4)=0

⇒m = 6,4

Therefore the auxiliary equation has two distinct and unequal root.

The general solution of this equation is

y_1(x)=x^4

and

y_2(x)=x^6

First we compute the Wronskian

W(x)= \left|\begin{array}{cc}y_1(x)&y_2(x)\\y'_1(x)&y'_2(x)\end{array}\right|

         = \left|\begin{array}{cc}x^4&x^6\\4x^3&6x^5\end{array}\right|

         =x⁴×6x⁵- x⁶×4x³    

        =6x⁹-4x⁹

        =2x⁹

       ≠0

The functions satisfy the differential equation and linearly independent since W(x)≠0

Therefore the general solution is

y= c_1x^4+c_2x^6

5 0
3 years ago
Other questions:
  • Can a 3 foot-by-9 foot rectangle be a scaled copy of a 3 foot-by-1 foot rectangle? Explain
    8·1 answer
  • What is length weight height and value mean
    10·1 answer
  • 1. twice the square of the sum of a number and 3 is 98.find the number​
    13·1 answer
  • The vertices of polygon ABCD are at A(1, 1), B(2, 3), C(3, 2), and D(2, 1). ABCD is reflected across the x-axis and translated 2
    5·1 answer
  • Question 7 Multiple Choice Worth 1 points)
    13·1 answer
  • Is the sum of -10 + (-18) positive or negative or zero ?
    8·1 answer
  • Help help help please i need help
    13·1 answer
  • What is a Ratio??????
    10·2 answers
  • What is the contra positive of the statement if 9x=27, then x=3
    5·1 answer
  • Find the value of x?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!