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
zvonat [6]
3 years ago
10

Evaluate 5x3 - 21 + 7 when x = -2.

Mathematics
2 answers:
Sliva [168]3 years ago
8 0

Answer:

26

Step-by-step explanation:

5x³ - 21 + 7

x = 2

then:

5x³ - 14

5*2³ -14

5*8 - 14

40 - 14

26

OverLord2011 [107]3 years ago
8 0

Answer:

The simplified answer to the given equation is -54.

Step-by-step explanation:

For this problem, we are given the value of x.

<em>x = -2</em>

So, let's plug in this value into our expression soit can be easier to solve.

5(-2)³ - 21 + 7

First, simplify the exponents.

5(-8) - 21 + 7

Now, multiply 5 by -8.

-40 - 21 + 7

Subtract -40 from 21.

-61 + 7

Add 7 to -61.

-54

You might be interested in
What is the lcm for 3/4and 1/2​
ioda

Answer:

1 1/2

Hope that helps!

Step-by-step explanation:

4 0
3 years ago
Write and expression for “the sum of d and 9”
Natali [406]

Sum means to Add.

So the sum of d and 9 would be d + 9

5 0
3 years ago
Read 2 more answers
If f(x) = 3x - 1 and g(x) = x + 2, find ( f - g) (x) ?
mylen [45]

(3x-1) - (x+2) = 2x -3

8 0
3 years ago
HELP PLEASE WILL MARL BRANIEST IF right
Kaylis [27]

Answer:

A bit of a doosy, but bare with me: f*g*h(x) = x^2+54x-12x\sqrt{x} -108\sqrt{x} +90

Step-by-step explanation:

So explaining this is a bit awkward as well, but I can try...So

Starting from g(x) working that backwards into f(x), so...

g(x) = x-3

f(x) = (x^4+9)

Take your g(x) and plug it into your f(x) into every x you see

f(g(x)) = (x-3)^4+9 ~ I hope you can visualize this, but do you see how g(x) plugs into f(x)...

Now you still have one more step which you still need to include h(x), so

Remember h(x) = \sqrt{x}

Now plug in your h(x) into every x you see from f(g(x)) and it should look like...

(\sqrt{x} -3)^4 + 9

3 0
3 years ago
Write a program that mimics a calculator. The program should take as input: The first integer The second integer The operation t
SashulF [63]

It takes value from a user and then user the operation of (+,-,*/).

i used c++ programming language to solve this program:

#include<iostream>

using namespace std;

int main() {

int var1, var2;

char operation;

cout << "Enter the first number : ";

cin >> var1;

cout << endl;

cout <<"Enter the operation to be perfomed : ";

cin >> operation;

cout << endl;

cout << "Enter the second nuber : ";

cin >> var2;

cout << endl;

bool right_input = false;

if (operation == '+') {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 + var2);

right_input = true;

}

if (operation == '-') {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 - var2);

right_input = true;

}

if (operation == '*') {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 * var2);

right_input = true;

}

if (operation == '/' && var2 != 0) {

cout << var1 << " " << operation << " " << var2 << " = " << (var1 - var2);

right_input = true;

}

if (operation == '/' && var2 == 0) {

cout << "Error. Division by zero.";

right_input = true;

}

if (!right_input) {

cout << var1 << " " << operation << " " << var2 << " = " << "Error;";

cout << "Invalid Operation!";

}

cout << endl;

system("pause");

return 0;

}

7 0
3 years ago
Other questions:
  • Given f (x) = 6x + 2, find f (x + 3).
    9·1 answer
  • Given g(x) = 2x + 5, find g(1)
    5·2 answers
  • Write the slope e-intercept from of the equation of the line through the given point with the given slope. Please show your work
    15·1 answer
  • June’s health insurance policy requires a copayment of $35 for each office visit and a copayment of $25 for each of her prescrip
    9·1 answer
  • Brianna is hiking on a mountain trail. she hikes 345 feet up hill but a horizontal distance of 295 feet. to the nearest degree.
    7·1 answer
  • What is -0.75 - (-2/3) +0.4 + (-3/4) =
    7·2 answers
  • Given the function f(x)=5x−6 find f(4).
    11·2 answers
  • Which is greater, 24 or - 25
    13·2 answers
  • The Chapin Social Insight Test evaluates how accurately the subject appraises other people socially. In the reference population
    9·1 answer
  • Instructions: Use a graphing calculator to approximate the zeros and vertex of the following quadratic functions. Round to one d
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!