twice a number decreased by six is 32 use "x" for the variable​

Answer:

Your answer should be $29.40

Step-by-step explanation:

If you divide 21 by 5 you get 4.2, so each book costs $4.20.

4.2 x 7 = 29.4

Therefore, your total cost for 7 books will be $29.40

I hope this helps!

Answer:

64

Step-by-step explanation:

Answer:

56

Step-by-step explanation:

4x4=16

2x4=8

8x4=32

       ± =56²

Answer:

Your image is not showing up on my screen

but to find a slope is To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points.

Step-by-step explanation:

Answer:

C. 40 square inches but i could be wrong

Answer:

1145

Step-by-step explanation:

830(2) 28/13

​   ^ do that ok??????? plug it in!!!!!!!!

then do u know what u will get? u will get this !!!!!! y = 1145.09631989

round 2 da whole numba and den boom shakalaka B ) i got my question wrong so that i could put the right answer here. bye yall

The number of bacteria doubling every 28 hours will be 1145 after 13 hours.

The formula for exponential growth is y = y₀.e^(kt).

The formula for exponential decay is y = y₀.e^(-kt).

In the case of doubling the growth of bacteria, we can use the formula,

[tex]y_f = y_0\times2^{\frac{t_r}{t}[/tex], where [tex]y_f[/tex] represents the final population, [tex]y_0[/tex] is the initial population, [tex]t_r[/tex] is the time we are required to determine, and [tex]t[/tex] represents the time rate growth.

Therefore from the given information, the number of bacteria after 13 hours will be,

[tex]y_f = 830\times2^{\frac{13}{28}[/tex].

[tex]y_f = 830\times1.38[/tex].

[tex]y_f = 1144.86[/tex] or 1145 bacterias.

Q. In a lab experiment, 830 bacteria are placed in a petri dish. The conditions are such that the number of bacteria is able to double every 28 hours. How many bacteria would there be after 13 hours, to the nearest whole number?​

learn more about bacteria growth problems here :

https://brainly.com/question/14106525

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Answer:

It is in deficit

Step-by-step explanation:

If you take her income (655) and subtract all of the expenses, including adding the annual expenses together and dividing them by 12 months, the result would be negative.

It is in deficit describes the Monica's budget.

Two or more expressions with an Equal sign is called as Equation.

We can calculate Monica's total fixed expenses as:

Rent + Electric + Transportation + Food + Entertainment = $200 + $45 + $78 + $190 + $30 = $543

Her annual expenses are:

Car Insurance + Books = $945 + $280 = $1225

Adding her fixed and annual expenses gives:

$543 + $1225 = $1768

Since her income is only $655, her expenses exceed her income and she is operating at a deficit. Therefore, the answer is: It is in deficit.

Hence, It is in deficit describes the Monica's budget.

To learn more on Equation:

https://brainly.com/question/10413253

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Answer:

19.625cm squared because you have to divide the diameter by 2 to get the radius.

Step-by-step explanation:

Answer:

x=4 I'm sorry that I used

Answer: 1 1/3

Step-by-step explanation: slope is the difference in y values over the difference in the c values

Answer:

[tex] m = \frac{14 - 2}{19 - 10} \\ \frac{12}{9} \\ m = \frac{4}{3} [/tex]

the slop is equal to 4/3

Answer: 3X2+4x=-2

Step-by-step explanation:because thats the mathematic equation for a average square

Answer:

I can automatically eliminate B and D because those values are two high. My guess is C 6.2.

Step-by-step explanation:

Answer:

the answer is 24x⁴

first you multiply 6 by 4,

next you multiply X² by x², which really means you add the numbers on top of the variable

Answer:

I guess the answer is D - 18x + 18

Answer: f(-9)= 243

Step-by-step explanation:

f(x) = 4x²+7x -18

f(-9) = 4(-9)²+7(-9)-18

= 4(81) -63-18

= 324- 81

= 243

Answer:

n=10

Step-by-step explanation:

Because all exterior angles =360

so 360/36=10

hope this helps

Answer:

n=10

Step-by-step explanation:

(10-2)x180 = 1440

1440/10 (the angle of each interior) = 144

180-144 = 36

Answer:

Katie’s brother is now 31 years old

Step-by-step explanation:

You would add 4 to 27

Answer:

R 8.8

Step-by-step explanation:

Here, we want to get the price per ticket

from the question, we have that 114 buys 13 tickets

thus, the cost of a ticket is R 114/13

= 8.80

Answer:

w = 31

Step-by-step explanation:

Since this is a rhombus

==> GFE + FED = 180

2w + w + 87 = 180

==> w = 31

9514 1404 393

Answer:

  (d)  112°

Step-by-step explanation:

Opposite angles in an inscribed quadrilateral are supplementary.

∠P = 180° -∠R = 180° -68°

∠P = 112°

Answer:

112 degrees.

Step-by-step explanation:

This is an isosceles trapezium.

So the required angle = 180 - 68 = 112.

Answer:

B 17.5 ft

Step-by-step explanation:

tangent = opposite / adjacent

tan 35° = h / 25

multiply both sides by 25

h = 25 (tan 35°)

tan 35° = 0.70 (from your calculator)

h = 25 (0.70)

h = 17.51 ft.

Step-by-step explanation:

5 360

8 x

5x=360•8

x=576miles

Answer:

2.2% per year

Step-by-step explanation:

Problem:

You deposit $500 into a bank account and received $55 simple interest after 5 years. What had been the interest rate?

Result:

The interest rate was 2.2% per year.

Explanation:

Find interest rate by using the formula I = P*i*t , where I is interest, P is total principal, i is rate of interest per year, and t is total time in years.  In this example I = $55, P = $500 and t = 5 years, so

i = 55/500*5

i=0.022 = 2.2% per year

Hope it helps XD

Answer:

A duck with 2 feet

Answer:

Donald duck and Remy

Step-by-step explanation:

Answer:

464 ft

Step-by-step explanation:

How to find out volume:

Length x Width x Height

= Volume

--

8 x 4 x 14.5 = 464 ft

Answer:

(x−5y)(9x+8)

Step-by-step explanation:

9x^2−45yx+8x−40y

Do the grouping 9x^2−45yx+8x−40y=(9x^2−45yx)+(8x−40y), and factor out 9x in the first and 8 in the second group.

9x(x−5y)+8(x−5y)

Factor out common term x−5y by using distributive property.

(x−5y)(9x+8)