please solve these. i need help please.
worth 30 points.

Answer:

? = 7x

Step-by-step explanation:

Lets simplify the equation first;

5x - 20 + ? = -20 + 12x

=> So now, we have to make the equation on the left equation congruent to the right equation:

It we already have -20 common on both sides, but we need to find out, what added by 5x gives us 12x,

=> So we can let the number we have to find out be y, and say:

5x + y = 12x

=> y = 12x - 5x

=> y = 7x

Therefore, ? = 7x

Hope this helps!

Answer:

a=8+1/2

Step-by-step explanation:

We move all terms to the left:

(a+5)2/3-(9)=0

We multiply all the terms by the denominator

(a+5)2-9*3=0

We add all the numbers together, and all the variables

(a+5)2-27=0

We multiply parentheses

2a+10-27=0

We add all the numbers together, and all the variables

2a-17=0

We move all terms containing a to the left, all other terms to the right

2a=17

a=17/2

a=8+1/2

Answer:

Data processing is a process of converting raw facts or data into a meaningful information. Data can be done manually using a pen and paper, mechanically using simple devices eg. typewritter or electronically using modern dat processing toolseg computers.

Step-by-step explanation:

9514 1404 393

Answer:

  D.  y= 2x + 10

Step-by-step explanation:

Try x=3 in the equations and see which one works.

  A: 2·3 -10 = -6 ≠ 16

  B: 1/2(3) +10 = 11.5 ≠ 16

  C: 1/2(3) -10 = -8.5 ≠ 16

  D: 2(3) +10 = 16 . . . . . . this equation works

Answer:

Step-by-step explanation:

alright l like this answer too

Answer:

solutions, x-intercepts, and zeroes

Step-by-step explanation:

Solutions are values that satisfy the equation. X-intercepts are values of x that the graph of the equation passes through the x-axis.

Zeroes are x values that are resulted from y=0

Answer:

12.7 is the answer

Answer: 12.7

Step-by-step explanation:

If you like to round 12.654 to the nearest tenth, leaving only one number after the decimal point, then you have come to the right post

Answer:

B

Step-by-step explanation:

I think

Answer:

The answer is "28, 35, 52, 65"

Step-by-step explanation:

Calculating the x,y:

  [tex]\to x< y<65\\\\\to 65 \times 28 xy=13 \times 5xy \times 7 \times 2^2\\\\x=13 \\\\y=5 \times 7= 35\\\\[/tex]

When

or  

[tex]x=35\\\\y= 13 \times 2^2=13 \times 4 =52[/tex]

So, the final answer is "28, 35, 52, 65".

Answer:

[tex] = 6 \div \frac{1}{7} \\ = 6 \times \frac{7}{1} \\ = 42 \: glasses[/tex]

Answer:

same thing as the person show u

Step-by-step explanation:

i do flvs ok du and that is the right anser

Answer:

2205

Step-by-step explanation:

Brainliest please!!!

Answer:

x =14

<A =  7x -11 =  87

<B = 2x-3 =  25

<C = 5x -2 = 68

Step-by-step explanation:

The sum of the angles add to 180

7x -11 + 2x-3 + 5x-2 = 180

Combine like terms

7x +2x+5x -11-3-2 =180

14x-16=180

Add 16 to each side

14x-16+16 =180+16

14x = 196

Divide each side by 14

14x/14 =196/14

x =14

<A =  7x -11 = 7*14 -11 = 98-11 = 87

<B = 2x-3 = 2*14 -3 = 28-3 = 25

<C = 5x -2 = 5*14 -2 = 70-2 = 68

9514 1404 393

Answer:

  711 square millimeters

Step-by-step explanation:

Assuming your B and H are the base and height of the relevant triangle, the numbers can be put into the area formula to find ...

  A = 1/2BH

  A = (1/2)(90 mm)(15.8 mm) = 711 square millimeters

Answer:

43 coins in each piggy bank

Step-by-step explanation:

well half of 86 os 43

because 43+43=86

Answer:

43

Step-by-step explanation:

i know my dang brainly

Answer:

1.8 ft^2

Step-by-step explanation:

Area of circle formula is πr^2

r is 1.5/2 or 0.75

π(0.75)^2

π*0.5625

π=3.14

3.14*0.5625=1.76625

Answer rounded to nearest tenth is 1.8 ft^2

Answer:

b = 133 and c = 47

Step-by-step explanation:

c has the same degree as the opposite side

to find the angle of b

1. supplementary line is 180 degrees

2. subtract 180 - 47

3. answer is 133

(i could be wrong but brainliest??)

Answer:

A, C, D

Step-by-step explanation:

A, C, D

Answer:

ok its 768 thank me later

Step-by-step explanation:

Answer:

The expression for the number of bacteria after t hours is [tex]P(t) = 50e^{0.2922t}[/tex]

Step-by-step explanation:

When introduced into a nutrient broth, the culture grows at a rate proportional to its size.

This means that the size of the population, after t hours, is modeled by the following differential equation:

[tex]\frac{dP}{dt} = rP[/tex]

In which R is the growth rate.

The solution of this differential equation is:

[tex]P(t) = P(0)e^{rt}[/tex]

In which P(0) is the initial population.

A culture of the bacterium Salmonella enteritidis initially contains 50 cells.

This means that [tex]P(0) = 50[/tex], and so:

[tex]P(t) = P(0)e^{rt}[/tex]

[tex]P(t) = 50e^{rt}[/tex]

After 1.5 hours, the population has increased to 775.

This means that [tex]P(1.5) = 775[/tex]. We use this to find r. So

[tex]P(t) = P(0)e^{rt}[/tex]

[tex]500e^{1.5r} = 775[/tex]

[tex]e^{1.5r} = \frac{775}{500}[/tex]

[tex]\ln{e^{1.5r}} = \ln{\frac{775}{500}}[/tex]

[tex]1.5r = \ln{\frac{775}{500}}[/tex]

[tex]r = \frac{\ln{\frac{775}{500}}}{1.5}[/tex]

[tex]r = 0.2922[/tex]

The expression is:

[tex]P(t) = 50e^{rt}[/tex]

[tex]P(t) = 50e^{0.2922t}[/tex]

The expression for the number of bacteria after t hours is [tex]P(t) = 50e^{0.2922t}[/tex]

9514 1404 393

Answer:

  (x -4)(x +1)

Step-by-step explanation:

  [tex]\dfrac{x^2-16}{x^2+5x+4}=\dfrac{(x+4)(x-4)}{(x+4)(x+1)}=\boxed{\dfrac{x-4}{x+1}}\qquad x\ne-4[/tex]

The simplified form comes with a domain restriction corresponding to the hole in the function where the original denominator is zero.

Answer:

A

Step-by-step explanation:

It is

Answer:

a

Step-by-step explanation:

Answer:

16

Step-by-step explanation:

-2^4=16

[tex]h \: is \: correct \: answer \: \\ if \: you \: put \: (0 \: t4) \: and \: (1 \: 6)you \: can \: find \: the \: answer[/tex]

Answer:

C. 88 degrees fahrenheit :)

Step-by-step explanation:

Answer:

.48

Step-by-step explanation:

$1.00-.52=.48

Answer:

3

Step-by-step explanation:

10+4x

10+12 = 22

so what number times 4 equals 12. So the answer is 3

Answer:

52 both

Step-by-step explanation:

4 is 128. flat surface is 180, 180-128= 52. 4 and 2 are equal, 1 and 3 too. So are 5=7 8=6