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3 years ago

Need help asap!!!! What is the coefficient for 9x=18?

2 answers:

6 0

9x=18
9x/9=18/9
X=2

If you have 9x it is best to assume it is 9 times x which means to get it by itself, you must divide by, in this case, 9 on both sides. This gets x by itself and the answer on the other side.

x=2

madam [21]3 years ago

5 0

Answer:

If ur looking for the answer for x then its 2

Step-by-step explanation:

9 times 2 = 18

there u go

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The function is given by the formula f(x)=3x+2.

Naily [24]

Answer:

(a) f(7) = 23

(b) x = 13/3

Step-by-step explanation:

Step 1: Define

f(x) = 3x + 2

(a) f(7) is x = 7

(b) f(x) = 15

Step 2: Substitute and Evaluate

(a) f(7) = 3(7) + 2

f(7) = 21 + 2

f(7) = 23

(b) 15 = 3x + 2

13 = 3x

x = 13/3

3 0

4 years ago

The travel time for a college student traveling between her home and her college is uniformly distributed between 40 and 90 minu

love history [14]

Answer:

d. the travel time

Step-by-step explanation:

We are studying the travel time for the college student, which is between 40 and 90 minutes, distributed uniformly.

40 and 90 minutes are the intervals of the variable, and the variable is the travel time, which is random. Uniform is how the distribution is characterized, which means that each outcome(travel time beween 40 and 90 minutes) is equally as likely.

So the correct answer is:

d. the travel time

4 0

3 years ago

True or False:

Naya [18.7K]

we can check if a given sequence is geometric or not by checking the terms present in it ,

Let us find ratio of each term with it's previous term

if that ratio comes out same for every two consecutive terms then it is a geometric sequence , otherwise it is not geometric sequence .

Let us work on first one : given is : -1,1,-1,1.............

second term/ first term = 1/-1 = -1

third term/ second term = -1/1 = -1

fourth term / third term = 1/-1 = -1

fifth term/ fourth term = -1/1 = -1

because that ratio is same so it is a geometric sequence .

* let us now work with second sequence .

second term/ first term = -6/-2 = 3

third term/ second term = -18/ -6 = 3

fourth term / third term = -54 / -18 = 3

hence this is also geometric sequence .

Answer : both are geometric sequence .

6 0

3 years ago

What are the solutions of the equation? 0=x^2-2x-24

Brrunno [24]

The solutions are: x = 6; x = -4.

Explanation: The given equation is:
x^2 -2x -24 = 0

x^2 -6x + 4x - 24 = 0
x(x-6) + 4(x-6) = 0
(x-6)(x+4) = 0

=> x = 6
=> x = -4

Hence the solutions are: x = 6; x = -4.

4 0

3 years ago

Parabolas. Please help me

olganol [36]

x² = 16 y
x = 0
(x + 4)² = 2/3 (y - 2)
Gayle identifies that the vertex of the parabola is (3, -1) . The parabola opens right, and the focus is 3 units away from the vertex. The directrix is 6 units from the focus. The focus is the point (6, -1). The directrix of the equation is x = 0.
(y - 6)² = 4p (x - 3)

Step-by-step explanation:

1. First figure

We plot the parabola as given in the attached diagram.

As it is facing upwards, the equation goes as x² = 4py

where, p = 4 (refer the attached diagram)

x² = 4py

x² = 4 (4) y

∴, standard form of parabola is x² = 16 y

2. Second figure

(y + 3)² = 4 (x - 1)

Comparing the given equation with the standard form

(y - k)² = 4p (x - h)

Now from this equation we get to know that

h = 1

p = 1

Directrix is x = (h - p)

So, x = 0

3. Third figure

3x² + 24x - 2y + 52 = 0

3x² + 24x = 2y - 52

3 (x² + 8x) = 2 (y - 26)

(x² + 8x) = 2 (y - 26) / 3

Adding 16 on both sides,

x² + 8x + 16 = 2 (y - 26) / 3 + 16

(x + 4)² = 2/3 y - 52/3 + 16

(x + 4)² = 2/3 y - 4/3

(x + 4)² = 2/3 (y - 2)

4. Fourth figure

(y + 1)² = 12 (x - 3)

Comparing the given equation with the standard form

(y - k)² = 4p (x - h)

Now from this equation we get to know that

k = -1

h = 3

p = 3

Gayle identifies that the vertex of the parabola is (3, -1) . The parabola opens right, and the focus is 3 units away from the vertex. The directrix is 6 units from the focus. The focus is the point (6, -1). The directrix of the equation is x = 0.

5. Fifth figure

Focus = (2, 6)

Directrix is x = 4

Therefore, it follows the standard form

(y - k)² = 4p (x - h)

Directrix is given by x = h-p = 4

Focus is given by (h + p, k) = (2, 6)

Solving for (h - p) = 4, (h + p) = 2

2 - p - p = 4

-2p = 2

p = -1

Hence, h = 3

Therefore, the standard form can be written as

(y - 6)² = 4p (x - 3)

7 0

4 years ago