All categories

3 years ago

Decide whether each equation is true for all, one, or no values of x.

Mathematics

1 answer:

Gala2k [10]3 years ago

3 0

Answer:

b) true for one value of x

a) true for all values of x

c) true for no values of x

sorry if they are wrong

Step-by-step explanation:

2x + 8 = -3.5x + 19

a) true for all values of x

b) true for one value of x

c) true for no values of x

9(x - 2) = 7x + 5

a) true for all values of x

b) true for one value of x

c) true for no values of x

3(3x + 2) - 2x = 7x + 6

a) true for all values of x

b) true for one value of x

c) true for no values of x

You might be interested in

Prove that opposite sides of a parallelogram are congruent. Be sure to create and name the appropriate geometric figures. (10 po

iren2701 [21]

Answer:

Theorem : Opposite sides of a parallelogram are congruent or equal.

Let us suppose a parallelogram ABCD.

Given: and (According to the definition of parallelogram)

We have to prove that: AB is congruent to CD and BC is congruent to AD.

Prove: let us take two triangles, and

In these two triangles, { By the definition of alternative interior angles}

Similarly,

And, AC=AC (common segment)

By ASA,

thus By the property of congruent triangle, we can say that corresponding sides of are also congruent.

Thus, AB is congruent to CD and BC is congruent to AD.

Step-by-step explanation:

5 0

3 years ago

PLEASEEEE HELPPP ITS DUE IN 15 MINUTES!! the exponential regression representing the population of Lazy Town as a function of ti

Advocard [28]

Given:

$R^2=0.92,a=8000,b=0.9$ .

Exponential regression model is

$y_1\sim a(b)^{x_1}$

To find:

The exponential regression representing the population of Lazy Town as a function of time in years.

Solution:

Exponential regression model is

$y_1\sim a(b)^{x_1}$ ...(i)

We have, $a=8000,b=0.9$ .

Substituting $a=8000$ and $b=0.9$ in (i), we get.

$y_1\sim 8000(0.9)^{x_1}$

Therefore, the exponential regression representing the population of Lazy Town as a function of time in years, is $y_1\sim 8000(0.9)^{x_1}$ .

4 0

3 years ago

Sole the proportion

Bess [88]

Answer:

11/6 or 1.8333333333

Step-by-step explanation:

$\frac{2x + 1}{6}$ = $\frac{7}{9}$

Cross Multiply:

7 x 6 = 42

9 (2x+1)

42 = 9(2x+1)

42 = 18x + 9

Then, isolate the variable. In order to do so, subtract 9 from both sides.

33 = 18x

Now, divide by 18 (to find x)

33/18 =

1.8333333 or 11/6

8 0

3 years ago

The flight of a kicked football follows the quadratic function f(x)=−0.02x^2+2.2x+2, where f(x) is the vertical distance in feet

Sergio039 [100]

Answer:

110.9 feet

Step-by-step explanation:

The function that models the flight of the ball is

$f(x) = - 0.02 {x}^{2} + 2.2x + 2$ where f(x) is the vertical distance in feet and x is the horizontal distance the ball travels

If the ball hits the ground, then f(x)=0

$\implies - 0.02 {x}^{2} + 2.2x + 2 = 0$

The solution is given by the quadratic formula:

$x = \frac{ - b \pm \sqrt{ {b}^{2} - 4ac} }{2a}$

We substitute a=-0.02, b=2.2, and c=2 to get:

$x = \frac{ - 2.2 \pm \sqrt{ {2.2}^{2} - 4 \times - 0.02 \times 2} }{2 \times - 0.02}$

This implies that:

$x = 110.90 \: or \: x = - 0.90$

Since we are dealing with time,

$x = 110.90$

To one decimal place, we have 110.9 feet

6 0

3 years ago

A train covers 165 km in 1.5 hours. Find the constant variation.

sdas [7]

Answer:

110

Step-by-step explanation:

To find the constant of variation, divide the number of km by the number of hours:

165/1.5

= 110

This means that the speed of the train is 110 km per hour.

So, the constant of variation is 110.

6 0

3 years ago

Read 2 more answers