The population of a small town can be described by the equation PN equals 4000+70n. Where n is the number of years after 2005. Explain in words what this equation tells us about how the population is changing.

Answer:

[tex]\boxed{y=-\frac{1}{2}x+2}[/tex]

Step-by-step explanation:

[tex]2x+4y=8\\\\2x-2x+4y=8-2x\\\\4y=8-2x\\\\\frac{4y=8-2x}{4}\\\\y=2-\frac{2}{4}x\\\\ y=2-\frac{1}{2}x\\\\\boxed{y=-\frac{1}{2}x+2}[/tex]

Hope this helps.

Answer:

y=4-x/2

Step-by-step explanation:

Answer:

Step-by-step explanation:

Area of rectangle = Length ×Breadth

[tex]Length =8x+1\\Breadth = 3x-2\\\\A =\left(8x+1\right)\left(3x-2\right)\\\\=8x\times\:3x+8x\left(-2\right)+1\times\:3x+1\times\left(-2\right)\\\\=8\times\:3xx-8\times \:2x+1\times \:3x-1\times\:2\\\\=24x^2-13x-2[/tex]

Answer:

a.  L.B. = 20.5

b.  U.B. = 21.5

Step-by-step explanation:

Length is measured 21 cm correct to 2 significant figures

a.  Lower bound of 21

  =  20.5 < 21

  = 20.5

b. Upper bound of 21

   = 21 < 21.5

   = 21.5

Answer:

________________________

I believe that it's 114 degrees.

________________________

Answer:

114

Step-by-step explanation:

angle Bcd=180-66=114 degrees

the two angles are supplementary equal to 180 degrees

Answer:

What's the answer

Step-by-step explanation:

The recursive function f(7) is = 7.f(8).

A recursive function is a form of arithmetic or geometric sequence which repeats.

According to the given question f(5) = 20.58 and f(6) = 2.9.

Given it is a recursive function so it could be in form of arithmetic sequence or geometric sequence.

We have asked f(7) is how many times of f(8) from here we can conclude that it is in the form of geometric sequence.

f(5) = 20.58 and f(6) = 2.94 so the common ratio of n/(n-1) is

= 20.58/2.94

= 7.

Or we can say that f(5) is 7 times of f(6) which is 7.f(6) = f(5).

∴ f(7) = 7.f(8) = (1/7)f(6) = 0.42.

learn more about recursive function here :

https://brainly.com/question/23896867

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Answer:

8x+40

Step-by-step explanation:

8*x=8x

8*5=40

=8x+40

Hope This Helped!!!

Answer: 8x+40

Step-by-step explanation:

Answer:

7.0 seconds

Step-by-step explanation:

i did the test but how i know this is bc 3 divided by 21 is 7

NOT 9

DON'T USE 9 AS THE ANSWER

Answer:

7.0 seconds

Step-by-step explanation:

Answer:

A: Domain: {9, 8, 7, -5} Range: {1, -3, 5, 3}

Step-by-step explanation:

C = {(9, 1) (8, -3) (7, 5) (-5, 3)}

The domain is the inputs

Domain: { -5,7,8,9}

The range is the output

Range{ -3,1,3,5}

This is a functions since there is no input that goes to multiple outputs

Answer:

113 square feet

Step-by-step explanation:

Since the shape of the mosaic that the architect would be using is circular is shape, the formula to apply to solve this question is area of a circle.

The formula for the area of a circle = πr²

In the above question,Area if a circle = πr²

radius of the circle = r = 6 feet

πr² = π × 6²

113.09733553 square feet

Approximately to the next whole number ≈ 113 square feet.

Therefore, the number in square feet of tiles needed for the mosaic is 113 square feet

Answer:

[tex]x=15/2=7.5[/tex]

Step-by-step explanation:

So we have the function:

[tex]f(x)=2x+1[/tex]

And we want to find x such that:

[tex]f(x)=16[/tex]

To do so, substitute 16 for f(x):

[tex]f(x)=2x+1\\16=2x+1[/tex]

Subtract 1 from both sides. The right side cancels:

[tex](16)-1=(2x+1)-1\\2x=15[/tex]

Divide both sides by 2. The left side cancels:

[tex](2x)/2=(15)/2\\x=15/2=7.5[/tex]

The value of x is 7.5

Answer:

[tex]x=\frac{15}{2}[/tex]

Step-by-step explanation:

We are given the value of f(x). Insert this value into the original equation:

[tex]f(x)=16\\\\16=2x+1[/tex]

Solve for x. Subtract 1 from both sides:

[tex]16-1=2x+1-1\\\\15=2x[/tex]

Divide both sides by 2 to isolate x:

[tex]\frac{15}{2} =\frac{2x}{2} \\\\\frac{15}{2}=x[/tex]

When f(x) equals 16, x is equal to [tex]\frac{15}{2}[/tex]

Answer:

B. 50 times greater

Step-by-step explanation:

Given;

size of phytoplankton = 2 × 10⁻⁶ in

size of sand grain = 1 × 10⁻⁴ in

Determine how many times longer the grain of sand is than the phytoplankton.

Divide the sand size by the phytoplankton size, to find out how much greater the sand is.

This can be done by equating it as follows;

2 × 10⁻⁶ (y)  = 1 × 10⁻⁴

[tex]y = \frac{1*10^{-4}}{2*10^{-6}} \\\\y = 50[/tex]

Therefore, the grain of sand is 50 times greater than the phytoplankton

B. 50 times greater

Answer:

The sum of a number and 7 multiplied by 2 is increased by 10

Step-by-step explanation:

Answer:

x = - 1, x = 1, x = 2

Step-by-step explanation:

The coefficients of the polynomial sum to zero, that is

- 1 + 2 + 1 - 2 = 0

This indicates that x = 1 is a zero

let x = - 1, then

- (- 1)³ + 2(- 1)² + (- 1) - 2 = 1 + 2 - 1 - 2 = 0

Thus x = - 1 is a zero

let x = 2

- (2)³ + 2(2)² + 2 - 2 = - 8 + 8 + 2 - 2 = 0

Thus x = 2 is a zero

The 3 zeros are x = - 1, x = 1, x = 2

Answer:

Truck can safely carry 2310 pounds of cargo.

Step-by-step explanation:

Given the safety limit of weight to cross the bridge safely is 4 tons.

1 ton is equal to 2000 pounds.

so, 4 tons are equal to 2000 [tex]\times[/tex] 4 = 8000 pounds

Now, given that

weight of empty truck and driver = 5690 pounds

To find:

Weight of cargo that the truck can safely carry ?

Solution:

Total weight of the truck is actually the combined weight of the empty truck, the drive and the cargo carried in it.

So, Total Weight allowed = 8000 pounds = 5690 pounds + Weight of Cargo

Weight of Cargo = 8000 - 5690 pounds

Weight of Cargo = 2310 pounds

Truck can safely carry 2310 pounds of cargo.

Answer:

Total cost is 2,800

Step-by-step explanation:

The given ratio 5:7:13 represents profit to cost of materials to labour.

However it is stated that cost of materials is Le 840 more than that of labour

Cost of material - 840 = labour

Cost of material = labour - 840

Let

Cost of material be x, and labour be y

x ÷ y = 7 ÷ 13 (equation 1)

x = y - 840 (equation 2)

Substitute x from equation 1 in equation 2

(y - 840) ÷ y = 7 ÷ 13

13 (y -840) = 7y

y = 1,820

Substitute value of y in equation 2

x = 1820 - 840

x = 980

So total cost is cost of material plus cost of labour = 980 + 1820 = 2,800

This will satisfy the ratio of 5:7:13 representing profit to cost of materials to labour

Answer:

-5

Step-by-step explanation:

We are given the expression:

[tex]\frac{1}{4} [-5+5(-3)][/tex]

and asked to evaluate.

We must solve this expression according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition and Subtraction.

Solve inside the brackets first. Multiply 5 and -3.

5 * -3= -15

[tex]\frac{1}{4} [-5+-15][/tex]

Add -5 and -15.

-5+-15= -20

[tex]\frac{1}{4} [-20][/tex]

Finally, multiply 1/4 and -20, or divide -20 by 4.

1/4 * -20 = -5      OR       -20/4= -5

[tex]-5[/tex]

When evaluated, the expression 1/4 [ -5 +5(-3)] is equal to -5.

Answer: 13 + 12i

Step-by-step explanation:

Answer:

-13+4i

Step-by-step explanation:

(-8+8i)-(5+4i)

(-8+8i)-5-4i

-8+8i-5-4i

-8-5+8i-4i

-13+4i

Answer:

Putting the value in x = 2 , y =4 in 2x - 2y we get,

2 × 2 - 4× 2= 4-8 = -4

Putting the value in z = 3 in z - 5 we get,

z - 5 = 3 - 5 = -2

Answer:

x-y=-2.

4x+y=2.

Answer is x=4/3 or 1.333333333.

Substitute x into eqtn I.

4/3-y=-2.

y=4/3+2.

y=10/3=3.333333333.~3.33

Answer:

x=2/9

Step-by-step explanation:

x^3=8/729

Hence,

x= cube root of (8/729)

x=cube root of 8

  cube root of 729

x=2

   9

Answer: decimal form : x=0.10475656

Step-by-step explanation:

Take roots of both sides and solve

Answer:

point A: 2

point B: -3

your friend is incorrect

Step-by-step explanation:

Answer:

point A: 2

point B: -3

your friend is incorrect

Step-by-step explanation:

[tex]2x+2(3x-8)=32\\2x+6x-16=32\\8x=48\\x=6[/tex]distribute and collect like-terms

to make sure of the answer:

[tex]2x+2(3x-8)=32\\2(6)+2(3(6)-8)=32\\12+2(18-8)=32\\12+36-16=32\\12+20=32\\32=32[/tex]

Answer:

area= 7725

Step-by-step explanation:

A = 75((125+81)/2) A = 75(206/2) A = 75(103) A = 7725 The area is 7725 square feet

==========================================

Explanation:

55 is close to 50

99 is close to 100

55/99 is close to 50/100 = 1/2

Using a calculator, 55/99 = 0.556 approximately which rounds to 0.5 = 1/2

Answer:

Herbs are small plants that have a fleshy or juicy stem when they are young. The stems of some herbs develop hard, woody tissue when they grow old. Most herbs are perennials. This means that the tops of the plants die each growing season, but the roots remain alive and produce new plants year after year.

Step-by-step explanation:

Step-by-step explanation:

Given that,

The area of a blackboard is [tex]1\dfrac{1}{3}=\dfrac{4}{3}\ \text{yards}^2[/tex]

The area of poster is [tex]\dfrac{8}{9}\ \text{yards}^2[/tex]

We need to find the unit rate of the blackboard's area to the poster's area. So, it can be calcualted by dividing blackboard's area to the poster's area.

So,

[tex]\dfrac{\dfrac{4}{3}}{\dfrac{8}{9}}=\dfrac{4}{3}\times \dfrac{9}{8}\\\\=1.5[/tex]

So, the rate of [tex]1.5\ \text{yard}^2[/tex].

Answer:

D. X=2

Step-by-step explanation:

Answer:

X=2

Step-by-step explanation:

Answer:

x = 1

y = 1

Step-by-step explanation:

Given:

Add up the two equations side-by-side, this will cancel y/b and 1/b:

Subtract the  two equations side-by-side, this will cancel x/a and 1/a:

Answer:

x = 1, y = 1

Step-by-step explanation:

[tex] \frac{x}{a} + \frac{y}{b} = \frac{1}{a} + \frac{1}{b} .....(1) \\ \frac{x}{a} - \frac{y}{b} = \frac{1}{a} - \frac{1}{b} .....(2) \\ \\ let \: \: \frac{1}{a} = m, \:\:\&\: \: \frac{1}{b} = n \\ so \: equatin \: (1) \: reduces \: to: \: \\ \\ so \: equatin \: (1) \: reduces \: to: \: \\ mx + ny = m + n....(3)\\ and \: equatin \: (2) \: reduces \: to: \: \\ mx - ny = m - n....(4) \\ adding \: equations \: (3) \: (4) \\ mx + ny = m + n \\ mx - ny = m - n \\ - - - - - - - - - - \\ 2mx = 2m \\ x = \frac{2m}{2m} \\ \huge \red{ \boxed{x = 1}} \\ substituting \: x = 1 \: in \: equatin \: (3) \\ m \times 1 + ny \: = m + n \\ m + ny \: = m + n \\ ny = m + n - m \\ ny = n \\ y = \frac{n}{n} \\ \huge \purple{ \boxed{y = 1}}[/tex]

Answer:

A, B, E

Step-by-step explanation:

Three or more points are said to be collinear, if they lie on a single straight line