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Amiraneli [1.4K]
3 years ago
15

Factor the expression completely.

Mathematics
1 answer:
netineya [11]3 years ago
3 0

Answer:

C. 2(2x + 3)(2x - 3)

Step-by-step explanation:

8 {x}^{2}  - 18 \\  = 2 \times 4 {x}^{2}  - 2 \times 9 \\  = 2(4 {x}^{2}  - 9) \\  = 2 \{( {2x})^{2}  - ( {3)}^{2}  \} \\  = 2(2x + 3)(2x - 3) \\

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What is the tangent ratio for
yawa3891 [41]

Answer:

tan T = 3/4

tan U = 4/3

Step-by-step explanation:

The tangent ratio is opposite / adjacent. The ratio will vary for each angle since the perspective of each angle will be different. For example Angle T has an adjacent side of 4 while Angle U has an adjacent side of 3. The tangent ratios for Angles U and T are listed below:

tan T = 3/4

tan U = 4/3

3 0
3 years ago
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Which has the greatest mass?
puteri [66]
A is the correct answer
8 0
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A mattress store boasts 4 out 5 sleepers in a commercial that airs locally. I talked to the owner and found out he only talked t
kaheart [24]
I believe its B. Stratified because the owner had to speak to ten individuals, meaning he divided it into smaller groups.
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3 years ago
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Determine the unknown angle measures, to the nearest degree, in the diagram provided.
serg [7]

Answer:

a is <u>5</u><u>3</u><u>.</u><u>8</u><u>°</u><u>,</u> and b is <u>3</u><u>6</u><u>.</u><u>2</u><u>°</u>

Step-by-step explanation:

Using sine trig rule:

{ \boxed{ \bf{ \sin(b) =  \frac{opposite}{hypotenuse}  }}}

{ \tt{ \sin(b) =  \frac{78}{132}  }} \\  \\ { \tt{b =  { \sin }^{ - 1}( \frac{78}{132} ) }} \\  \\ { \tt{b = 36.2 \degree}}

Summation of angles of triangle:

{ \tt{a + b + 90 \degree = 180 \degree}} \\ { \tt{a + 36.2 \degree + 90 \degree = 180 \degree}} \\ { \tt{a = (180 - 36.2 - 90) \degree}} \\ { \tt{a = 53.8 \degree}}

7 0
2 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
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