Ask question

Ask question

All categories

3 years ago

11

Given that y varies directly with x in the table below, what is the value of y if the value of x is 7?

2 answers:

Black_prince [1.1K]3 years ago

6 0

Write out the governing equation:

y = kx.

Take any point from the given table. You haven't shared the table, so I will invent a point: (2, 9).

Then find k: k = 9/2 Then the equation becomes y = (9/2)x.

Now let x = 7 and find y: y = (9/2)(7) = 63/2

Answer: y = 63/2

Nat2105 [25]3 years ago

4 0

Answer:

B. 42

Hope this helps!

You might be interested in

How are algebraic expressions used to represent and solve problem

spin [16.1K]

The purpose of solving an algebraic expression in an equation is to find the unknown variable. When two expressions are equated, they form an equation and therefore, it becomes easier to solve for the unknown terms. To solve an equation, place the variables on one side and the constants on the other side.

Sure hope this helps

8 0

2 years ago

9x^2+4y^2+54x+8y-59=0

dsp73

The standard form of an ellipse is

$\dfrac{(x-x_0)^2}{a^2}+\dfrac{(y-y_0)^2}{b^2}=1$

Let's try to complete some squares: if we focus on the part involing x, we have

$9x^2+54x = 9x^2+54x+81-81 = (3x+9)^2-81 = 9(x+3)^2-81$

Similarly, for the part involving y, we have

$4y^2+8y = 4y^2+8y+4-4 = 4(y+1)^2-4$

So, the equation becomes

$9(x+3)^2-81 + 4(y+1)^2-4 - 59=0 \iff 9(x+3)^2+ 4(y+1)^2-81-4-59=0 \iff 9(x+3)^2+ 4(y+1)^2 = 144$

Divide both sides by 144 to get

$\dfrac{(x+3)^2}{16}+ \dfrac{(y+1)^2}{36} = 1$

which is the standard form

6 0

4 years ago

1.) 7, 9, 11, 13, . . . is it 2.) 2,1, 1 , 1

Romashka-Z-Leto [24]

I am gonna guess it is C. Both for this one.

3 0

4 years ago

What is y={\dfrac{4}{5}}x+2y= 5 4 x+2y, equals, start fraction, 4, divided by, 5, end fraction, x, plus, 2 written in standard

Alex73 [517]

Answer:

$5y-4x=10$

Step-by-step explanation:

We have been given an equation $y=\frac{4}{5}x+2$ . We are asked to write our given equation in standard form.

We know that standard form of an equation is in form $Ax+By=C$ , where A, B and C are constants.

First of all, we will bring x term to left of the equation as:

$y-\frac{4}{5}x=\frac{4}{5}x-\frac{4}{5}x+2$

$y-\frac{4}{5}x=2$

Now, we will multiply both sides of equation by 5 as:

$y\cdot 5-\frac{4}{5}x\cdot 5=2\cdot 5$

$5y-4x=10$

Therefore, our equation in standard form would be $5y-4x=10$ .

6 0

3 years ago

Help pls. Question 4(Multiple Choice Worth 1 points)

katrin [286]

Answer:

Second choose

Step-by-step explanation:

We know that 4^3 is the greatest

And 14/9 is the least

8 0

3 years ago

Read 2 more answers