All categories

2 years ago

4. What is the x-value of

Mathematics

1 answer:

Viefleur [7K]2 years ago

3 0

Answer:

B) 1

Step-by-step explanation:

Since we are using elimination, we can just cancel 2y and -2y. No need of multiplying anything if we are just looking for x.

We add the equations and get:

9x=9

Then divide and the final answer is:

x=1

You might be interested in

-4x – 2y=-12<br> 4x + 8y=-24<br> Solve each system by elimination

kirza4 [7]

Answer:

x = 6 and y = - 6

Step-by-step explanation:

- 4 x - 2 y = -12.......equ No 1

4 x + 8y = - 24.......equ No 2

Adding equ No 1 and equ No 2

6 y = - 36

∴ y = - 6

substitute y = - 6 in equ No 2

4 x + 8 y = -24

4 x + 8 ×( -6) = - 24

4 x - 48 = -24

4 x = -24 + 48

4 x = 24

∴ x = 6

x = 6 and y = - 6

7 0

3 years ago

What is the vertex of y=x^2+4x+3

AnnyKZ [126]

Answer:

(-2, -1)

Step-by-step explanation:

This is a quadratic equation in standard form, and a = 1, b = 4 and c = 3.

The x-coordinate of the vertex is given by the formula

-b -4

x = --------- which here has the numerical value x = -------- = -2

2a 2

Finally, we evaluate y=x^2+4x+3 at x = -2 to find the y-coordinate of the vertex:

y = (-2)^2 + 4(-2) + 3 = -1

The vertex is at (-2, -1).

7 0

3 years ago

Algebra, im so confused

kramer

By analyzing and understanding the graph of the absolute value function, we find that the function evaluated at the x-value equal to 1 is equal to the y-value equal to 3.

<h3>What is the y-value associated to a given x-value of an absolute value function? </h3>

In this problem we find the representation of an absolute value function, where the horizontal axis corresponds to the values of the domain, whereas the vertical axis is for the values of the range. In that picture we must look up for the y-value associated with a given x-value.

Then, we proceed to evaluate the absolute value function at x = 1. In accordance with the graph, the y-value , that is, from the vertical axis, associated with the x-value, that is, from the horizontal axis, equal to 1 is equal to a value of 3.

To learn more on absolute values: brainly.com/question/1301718

#SPJ1

8 0

1 year ago

If 4^3x−2 =4^x+1, then x=<br><br> ? the pic looks better<br>

iris [78.8K]

After solving $4^{3x-2}=4^{x+1}$ we get value of x: $x=\frac{3}{2}$

Step-by-step explanation:

We need to solve the equation $4^{3x-2}=4^{x+1}$ and find value of x:

Solving:

$4^{3x-2}=4^{x+1}$

Using the rule: if $if\,\,a^{x}=a^{y}\,\,then\,\,x=y$

Since our base is equal i.e 4 so,

$3x-2=x+1\\3x-x=1+2\\2x=3\\x=\frac{3}{2}$

So, After solving $4^{3x-2}=4^{x+1}$ we get value of x: $x=\frac{3}{2}$

keywords: Solving Exponents

Learn more about Solving Exponents at:

#learnwithBrainly

3 0

2 years ago

Lee’s family had a garden in the shape of a right triangle. The total area of the garden is 16 square feet. If they expand the g

pickupchik [31]

If the triangle is increased to twice the base and the height the size will increase by 48 ft²

<h3>How to find the area of a triangle?</h3>

The area of a triangle can be described as follows;

area of a triangle = 1 / 2 bh

where

b = base
h = height

Therefore, the total area of the garden is 16 square feet.

Hence,

16 ft² = 1 / 2 bh

Hence, if the the triangle is increased to twice the base and the height the size will be as follows;

area = (1 / 2) × 2b × 2h

area = 4 × (1 / 2 bh)

area = 4 × 16

area = 64 ft²

Therefore,

difference in area = 64 ft² - 16 ft²

difference in area = 48 ft²

Therefore, if the the triangle is increased to twice the base and the height the size will increase by 48 ft²

learn more on triangle here: brainly.com/question/9593766

#SPJ1

6 0

1 year ago