Is the equation always sometimes or never true . . 15+2x-4=9x+11-7x. . 2x+3(4x-1)=2(5x+3)+4x

Answers

Answer 1

Answer: 15 + 2x - 4 = 9x + 11 - 7x is always true. You can prove this by plugging in random values for x. I plugged in x = 0, (11=11), and x=1 (13=13).

2x + 3(4x-1) = 2(5x+3) = 4x is never true. When you try to solve for x, the x disappears.

2x +12x - 3 = 10x + 6 + 4x

14x - 3 = 14x + 6

-3 = 6 Not possible.

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(9x3 - 2x2 - 3) - (4x3 - 9x + 6)

Answers

Answer: 22

Step-by-step explanation:

What does interior angle A of the polygon in the figure equal?

Answers

Based on the attached image, the interior angle A of the polygon in the figure equal 110 degrees. If you can see the image the angle A is equal to the angle on the other side. The angle A is an example of obtuse angle because has the size of more 90 degrees and less than 180 degrees. All the angles in the image are obtuse except the one angle in the top that measures 50 degrees.

A ball is thrown horizontally from the top ofa building 110 m high. The ball strikes the
ground 61 m horizontally from the point of
release.
What is the speed of the ball just before it
strikes the ground?
Answer in units of m/s

Answers

The speed of the ball would be 13 m/s just before it strikes the ground.

A ball is thrown horizontally from the top of a 110 m high building. 61 meters horizontally from the moment of release, the ball falls on the earth.

What is the velocity?

Velocity is defined as the displacement of the object in a given amount of time and is referred to as velocity.

First of all, we get the time of aviation from the vertical component:

Here s = 110 m and g = 9.8 m/s²

s = 1/2 × gt²

Solve for t

t = √(2s/g)

Substitute the values of s = 110 m and g = 9.8 m/s² in the equation,

t = √(2×110/9.8)

t = √22.44

t = 4.7 sec

The horizontal component of velocity is constant :

v = s/t

Here s = 61 m and t = 4.7 sec

v = 61/4.7

v = 12.97 ≈ 13

Therefore, the speed of the ball would be 13 m/s just before it strikes the ground.

Learn more about Velocity here:

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If the population of an ant hill doubles every 20 days and there are currently 30 ants living in the hill, what will the population be after 60 days?

Answers

The number of ants after 60 days is 240.

What is an expression?

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

The population of ants doubles every 20 days.

Current number of ants = 30

Now,

The number of ants after 20 days.

= 30 x 2

= 60

The number of ants after 40 days.

= 60 x 2

= 120

The number of ants after 60 days.

= 120 x 2

= 240

Thus,

The number of ants is 240.

Learn more about expressions here:

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after 20 days , ants will be double so 60 ants
again after 20 days, there will be 120 ants

and at last

after total of 60 days, ants will be 240 in number ! .....answer !

what is the exact value of sin 22.5 degrees using the sum, difference, half, or double angle formulas and the exact value chart in the solution.

Answers

$cos 2x=1-2sin^2x \n cos 45^0=1-2sin^2(22,5)^0 \n ( √(2) )/(2) =1-2sin^2(22,5)^0 \to sin(22,5)^0= \frac{ \sqrt{2- √(2) } }{2}$

Between what two consecutive integers does√73
lie????

A: 71 and 73
B: 8 and 9
C: 9 and 10
D: 10 and 11

Answers

Hey there, √73 is between the two square roots, √81 and √64, now, 8*9=72, so, √64, √73, and √81. So, 8<√73<9. Therefore, the answer is B. 8 and 9

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