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2 years ago

Evaluate math pls help algebra

Mathematics

2 answers:

Ne4ueva [31]2 years ago

4 0

Answer:

a. is equal to -10

b. is equal to -1

c. is equal to 5

Step-by-step explanation:

a :

3(-2)-4

-6-4

-10

b :

3(1)-4

3-4

-1

c :

3(3)-4

9-4

These are the correct answers,please mark brainliest.

Free_Kalibri [48]2 years ago

3 0

Answer:

A. -10

B. -1

C. 5

Step-by-step explanation:

A. 3x-4 = 3(-2)-4 = -10

B. 3x-4 = 3(1)-4 = -1

C. 3x-4 = 3(3)-4 = 5

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Write a quadratic equation given the roots -1/3 and 5, show your work

Travka [436]

$\boxed{(x - a)(x - b) = 0}$

The equation above is the intercept form. Both a-term and b-term are the roots of equation.

$x = - \frac{1}{3} \\ x = 5$

These are the roots of equation. Therefore we substitute a = - 1/3 and b = 5 in the equation.

$(x + \frac{1}{3} )(x - 5) = 0$

Here we can convert the expression x+1/3 to this.

$x + \frac{1}{3} = 0 \\ 3x + 1 = 0$

Rewrite the equation.

$(3x + 1)(x - 5) = 0$

Simplify by multiplying both expressions.

$3 {x}^{2} - 15x + x - 5 = 0 \\ 3 {x}^{2} - 14x - 5 = 0$

Answer Check

Substitute the given roots in the equation.

$3 {(5)}^{2} - 14(5) - 5 = 0 \\ 75 - 70 - 5 = 0 \\ 75 - 75 = 0 \\ 0 = 0$

$3( - \frac{1}{3} )^{2} - 14( - \frac{1}{3}) - 5 = 0 \\ 3( \frac{1}{9} ) + \frac{14}{3} - 5 = 0 \\ \frac{1}{3} + \frac{14}{3} - \frac{15}{3} = 0 \\ \frac{15}{3} - \frac{15}{3} = 0 \\ 0 = 0$

The equation is true for both roots.

Answer

$\large \boxed {3 {x}^{2} - 14x - 5 = 0}$

8 0

2 years ago

Help on geometry please (answer #5)

jekas [21]

it would be a, b, and c because if you look at the question and the answers, 3 of the four answers match the 3 of the 4 coordinates

6 0

3 years ago

Find the values of x and y so that ABCD will be a parallelogram.

arsen [322]

Given:

Figure of a parallelogram.

To find:

The values of x and y.

Solution:

If two parallel lines intersected by a transversal line, then the alternate interior angles are congruent.

$4x=24$ (Alternate interior angles)

$x=\dfrac{24}{4}$

$x=6$

And,

$y-10=32$ (Alternate interior angles)

$y=32+10$

$y=42$

The value of x is 6 and the value of y is 42.

Therefore, the correct option is C.

3 0

3 years ago

Lines a and d are

ICE Princess25 [194]

Answer:

perpendicular (90 deg to each other)

Step-by-step explanation:

8 0

2 years ago

Help please, my brains is empty :o(

den301095 [7]

Answer:

I think 5 and 5 are equal so the angles are equal which are 70,70

Step-by-step explanation:

70+70+x=180

140+x=180

x=40

6 0

3 years ago