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2 years ago

Help plz with this problems

Mathematics

1 answer:

prohojiy [21]2 years ago

3 0

To find the perpendicular slope, we simply flip the fraction (aka reciprocal) and flip the sign (go from positive to negative, or vice versa)

So for problem 1a) we flip the fraction to go from 4/3 to 3/4. Then we flip the sign to go from +3/4 to -3/4. The final answer to problem 1a) is -3/4

The answer to problem 1b) is 7/3 following the same basic steps: -3/7 ---> -7/3 ---> 7/3

The answer to problem 1c) is -1/4. You can think of 4 as 4/1 which flips to 1/4 and it becomes -1/4

I'll let you try out the rest 1d and 1e. Tell me what you get so I can check your answers.

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Which equation could generate the curve in the graph below?

dimulka [17.4K]

Answer:

The answer is option 1.

Step-by-step explanation:

In order to find the equation, you have to apply Discriminant Law, D = b² - 4ac. When D < 0, the equation has no real roots (no x-intercept). When D = 0, it has 2 and equal roots (1 x-intercept). When D > 0, it has 2 distinct roots (2 x-intercept).

Option 1,

$y = 3 {x}^{2} - 2x + 1$

$D = {( - 2)}^{2} - 4(3)(1)$

$D = - 8$

$D < 0$

Option 2,

$y = 3 {x}^{2} - 6x + 3$

$D = {( - 6)}^{2} - 4(3)(3)$

$D = 0$

Option 3,

$y = 3 {x}^{2} - 7x + 1$

$D = {( - 7)}^{2} - 4(3)(1)$

$D = 37$

$D > 0$

Option 4,

$y = 3 {x}^{2} - 4x - 2$

$D = {( - 4)}^{2} - 4(3)( - 2)$

$D = 40$

$D > 0$

As you look at the graph, the curve does not meet x-axis so the discriminant must be less than 0.

7 0

3 years ago

125 is what percent of 50?

Harrizon [31]

Answer:

Step-by-step explanation:

6 0

2 years ago

Read 2 more answers

What is the value of 1 raised to a negative exponent?

Vinil7 [7]

Answer:

its whatever the exponent is

Step-by-step explanation:

5 0

2 years ago

A bag contains purple marbles and white marbles, 96 in total. The number of purple marbles is 6 less than 5 times the number of

love history [14]

<em /><em>PURPLE MARBLES=P
WHITE MARBLES=W

</em>First, write out an equation showing the number of purple marbles.
P=5W-6
Then, write out the main equation.
W+P=96
W+5W-6=96
Add 6 to both sides.
W+5W=102
6W=102
Divide both sides by 6
W=17
Now that we know there are 17 white marbles, we can go back to the equation about how many purple marbles there are.
P=5W-6
Plug in the value for W, which is 17.
P=5(17)-6
P=85-6
P=79

To make sure your answer is correct, check your work by plugging in the values for P+W=96.
79+17=96
Answer: There are 79 purple marbles.

8 0

2 years ago

Factor the expression below. 9x^2-1 A. (3x - 1)(3x - 1) B. (3x - 1)(3x + 1) C. (x - 1)(9x - 1) D. (x - 1)(9x + 1)

aliya0001 [1]

Answer:

(3x + 1) • (3x - 1)

Step-by-step explanation:

Step by Step Solution

More Icon

STEP

Equation at the end of step 1

3 ${}^{2}$ x ${}^{2}$ - 1

STEP

Trying to factor as a Difference of Squares:

2.1 Factoring: 9x ${}^{2}$ -1

Theory : A difference of two perfect squares, A ${}^{2}$ - B ${}^{2}$ can be factored into (A+B) • (A-B)

Proof : (A+B) • (A-B) =

A ${}^{2}$ - AB + BA - B2 =

A ${}^{2}$ - AB + AB - B2 =

A ${}^{2}$ - B2

Note : AB = BA is the commutative property of multiplication.

Note : - AB + AB equals zero and is therefore eliminated from the expression.

Check : 9 is the square of 3

Check : 1 is the square of 1

Check : x ${}^{2}$ is the square of x1

Factorization is : (3x + 1) • (3x - 1)

Final result :

(3x + 1) • (3x - 1)

6 0

1 year ago