Find the value of x.

Answer:

C

Step-by-step explanation:

55% is the same thing as 0.55. 0.55(300) equals 165

Hope this helps! Please give brainliest!!

Answer:

Angle DBC and angle BDA form a pair of corresponding angles, not a pair of vertical angles

Step-by-step explanation:

Once it is stated that  the triangles ABD and  CDB are congruent by SAS postulate, it is concluded that, by CPCTC, angles DBC and BDA are congruent because they are corresponding angles.

Answer:

the person above is correct

Step-by-step explanation:

Answer:

y≥0

Step-by-step explanation:

no matter what is written inside it,

|x|≥0

so here

f(x)≥|-x|

so

f(x)≥0

then

y≥0

Answer: B

Step-by-step explanation:

-3x^2-9xi+9ix-27

-3x^2-27

The equivalent expression is (-3x+ 9i)(x+ 3i).

Mathematical statements are called expressions if they have at least two terms that are related by an operator and contain either numbers, variables, or both. Addition, subtraction, multiplication, and division are all possible mathematical operations.

A mathematical expression is a phrase that has a minimum of two numbers or variables and at least one mathematical operation.

Given:

-3x² - 27

First, (-3x - 9i)(x+ 3i)

= -3x² - 9ix - 9ix -27i²

= -3x² -18i + 27

Second, (-3x+ 9i)(x+ 3i)

= -3x² -9xi + 9ix + 27i²

= -3x² - 27

Third, (-3x+ 3i)( x+ 9i)

= -3x² -27ix + 3ix + 27i²

=-3x² -24ix - 27

Fourth, (-3x - 3i)( x- 9i)

= -3x² - 27ix - 3ix -27i²

= -3x² - 30ix + 27

Hence, the equivalent expression is (-3x+ 9i)(x+ 3i).

Learn more about expression here:

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Answer:

a) 8 seconds

b) 3 seconds

c) 170 meters

Step-by-step explanation:

a) When the ball lands in the sea, s = -80.

-80 = 30t − 5t²

5t² − 30t − 80 = 0

t² − 6t − 16 = 0

(t + 2) (t − 8) = 0

t = -2 or 8

t = 8 seconds

b) The ball reaches its highest point when the velocity is 0 (or at the vertex of the parabola).

t = -b / (2a)

t = -30 / (2 × -5)

t = 3 seconds

c) The highest point is:

s = 30(3) − 5(3)²

s = 45

So the ball rises 45 meters, falls 45 meters, then falls 80 meters.

The total distance traveled is 45 + 45 + 80 = 170 meters.

Answer:

3 (x - 5.50) = 111.75

Step-by-step explanation:

They paid $111.75 for three months,  that means they minus $5.50 every month which means a total of $16.5 for three months.

So you need use $111.75 plus the credit $16.5 for three months

111.75 + 16.5 = 128.25

Then use divide them by 3, (three months)

128.25 / 3 = 42.75

So they pay $42.75 per month before the credit.

I wish this could help you.

Answer:

b

Step-by-step explanation:

because i just took the test

Answer:

the standard form is g(x)=x^2+2x-1

Step-by-step explanation:

Answer:

(x, y) = (-404/55, 83/11)

Step-by-step explanation:

15x + 4y = -80

5x + 5y = 1

Multiplying both side of 2nd equation by 3:

=>

15x + 4y = -80

15x + 15y = 3

Subtracting the 1st equation from 2nd equation:

=>

11y =  83

Dividing both sides by 11 to work out y:

=> y = 83/11

Substituting y back into 2nd equation to work out x:

=> 5x + 5(83/11) = 1

=> 5x + 415/11 = 1

=> 5x = 1 - 415/11

=> 5x = -404/11

=> x = (-404/11)/5

=> x = -404/55

=> (x, y) = (-404/55, 83/11)

Hope this helps!

Answer:

Square pyramid

Step-by-step explanation:

A square pyramid is a pyramid having a square base.If all edges are equal, it is an equilateral square pyramid. Four Congruent sides so it is surely a square pyramid.

Answer:

Square pyramid

Step-by-step explanation

A square pyramid is a pyramid that has a square base. Also, once it has four congruent sides, it is a square in the center of the net.

Answer:

Step-by-step explanation:

The graph for the inequality is attached with the answer.

We have a linear inequality -

y < 3x + 1

We have to plot the graph of this linear inequality.

An inequality in mathematics compares two values or expressions, showing if one is less than, greater than, or simply not equal to another value.

According to the question, we have -

y < 3x + 1

Now, in order to plot the graph for this inequality, let -

y = 3x + 1

Plot the line for the above equation. Remember to plot the graph in the form of dashed line since the inequality is strict inequality.

Consider the point (0, 0) -

Solve the inequality for the point (0, 0), we get -

0 < 3 x 0 + 1

0 < 1

Which is true.

Hence, shade the complete area on that side of line where the point

(0, 0) lies.

To solve more questions on Plotting inequalities, visit the link below -

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Answer:

A. 5 units

Step-by-step explanation:

Answer:

[tex]A = 20,000(0.85)^t[/tex]

Step-by-step explanation:

We will use the formula for compound interest here

where [tex]A = p( 1 + r)^t[/tex]

   A=future value  for any sum

   P=present value of the sum

   r= yearly interest rate, it should be expressed in  decimal

   t=time period , it should be in years

______________________________

given in the problem

p = $20,000

r = 15% (in decimal 15/100 = 0.15)

t is the time for which equation is to be model to find future value p

since, rate is for depreciation we need to take negative value of rate as value for computer will decrease

thus

r = -0.15

using the above values in formula  [tex]A = p( 1 + r)^t[/tex]

[tex]A = p( 1 + r)^t\\A = 20,000(1 - 0.15)^t\\A = 20,000(0.85)^t[/tex]

Thus, model  equation for the value of the computer is [tex]A = 20,000(0.85)^t[/tex]

Answer:

7

Step-by-step explanation:

Answer:

11x+2y+21 x = 15

2x+3y+6z = -29

13x+9x+2x =22

Step-by-step explanation:

This is an augmented matrix

It is the coefficients of the variables and the last number is the constant

11x+2y+21 x = 15

2x+3y+6z = -29

13x+9x+2x =22

Step-by-step explanation:

Jane had 785 dollars in her checking account before jane took out 135 dollars.

Answer:

$785

Step-by-step explanation:

We know she has $650 and she took out $135, so lets add them together.

650+135

=785

therefor Jane had a total of $785 in her checking account before she made any transactions that day.

Hope this helps, :)

Answer:

C

Step-by-step explanation:

Answer:

30 divided by 3

Step-by-step explanation:

30 positive tiles are divided into 3 sets of 10 positive tiles.

+30 ÷3 = +10

Answer:

9

Step-by-step explanation:

|4 - 5 + 10| = |9| = 9

Answer:

* = 9

Step-by-step explanation:

|4 - 5 + 10| = *

| -1 + 10 | = *

| 9 | = *

* = 9

Answer:

6

Step-by-step explanation:

Sum of first 4 numbers= 4*5= 20

This includes 3 + 4th number

Sum of last 4 numbers= 4*8= 32

This includes 4th number + 3

Sum of 7 numbers= 7*(6+4/7)= 46

This includes 3+4th number +3

Number common to both sets= (20+32)- 46 = 6

Answer:

The correct option is 4.

4) Doing two distance formulas to show that adjacent sides are not the same length.

Step-by-step explanation:

Parallelogram is a quadrilateral which has opposite sides equals and parallel. Example of a parallelogram are rhombus, rectangle, square etc.

We can prove that a quadrilateral MNOP is a parallelogram. If we find the slopes of all four sides and compare those of the opposite ends, same slopes would indicate the opposite sides are parallel, hence the quarilateral is a parallelogram. We can also find the distance of two opposing sides, and slopes of twp opposing sides to determine whether it is a parallelogram or not. The most difficult approach is that diagonals bisect each other at same point.

However, using only two distance formulas will not give us enough information to determine whether a side is parallel or not.

The answer to your question would be wx/6

Answer:

0.0762 kilograms

Answer:

0.0762  kilograms

Step-by-step explanation:

Answer:

1 1/3 meter a minute

Step-by-step explanation:

it pretty simple i just added

Answer:

1 1/3

Step-by-step explanation:

Answer:

B. x = 3

Step-by-step explanation:

You really don't need to quadratic formula for this. It would take too much time. Instead, factor out the equation:

(x -3)(x - 3) = 0

Once you found that, you should see that your roots will equal to 3.

Answer:

solution,

Rewrite x^2-6x+9 in the form a^2-2ab+b^2 where a=X and b=3.

[tex] {x}^{2} - 2(x)(3) + {3}^{2} = 0[/tex]

Use square of difference,

[tex] {(a - b)}^{2} = {a}^{2} - 2ab + {b}^{2} \\ {(x - 3)}^{2} = 0[/tex]

Take the square root of both sides

[tex]x - 3 = 0[/tex]

Add 2 to both sides,

[tex]x - 3 + 3 = 0 + 3 \\ x = 3[/tex]

hope this helps..

Good luck on your assignment..

Answer:

Yes

No

Yes

No

Step-by-step explanation:

9, 15 have 3 as the GCF

12, 18 have 6 as the GCF

15, 27 have 3 as the GCF

30, 45 have 15 as the GCF

Answer:

Please see attached image

Step-by-step explanation:

We start by finding the actual algebraic expression for g(x):

g(x) = f(x+1) = 4(x+1) - 2 = 4 x + 4 - 2 = 4 x + 2

Then we plot this function on the x-y plane using two or three pairs solution to the equation, like:

for  x = 0  g(x) = 2

for x = 1   g(x) = 6

for x = -1  g(x) = -2

and joining them with a line.

Answer:

146 units

£31.36

Step-by-step explanation:

First 100 units= 24 p/unit

Remainder= 16 p/unit

Units used:

Cost:

Answer:

24

Step-by-step explanation:

It takes 40 / 5 = 8 minutes to fill one pool so it will take 8 * 3 = 24 minutes to fill 3 pools.

Answer: 24

Step-by-step explanation:

40/5=8

So 8hrs per pool, and there are  3 pools so 8*3=24min