Solve: (7+5i) + n =0, what's n? What
property is this?
Hurry please need it.

Answer:

y = 1/20 x + 5

Step-by-step explanation:

Let the height of the sand dune after x years be represented by the equation

y = mx+c where;

m is the rate at which the hills is eroding

c is the height of the dunes above the sea

If The hill is eroding at a rate of 1 foot per 20 years,then the rate of eroding per year will be;

1foot = 20years

m = 1year

Cross multiply

20m = 1

m = 1/20 foot/yr...

c = 5foot

Substitute into the formula:

y = 1/20 x + 5

Hence the equation that represent the situation is y = 1/20 x + 5

Answer:

b

Step-by-step explanation:

The value of 42−{(7+14)÷7}×4 will be 30.

A mixture of variables, numbers, addition, subtraction, multiplication, and division are called expressions.

An expression is a mathematical proof of the equality of two mathematical expressions.

A statement expressing the equality of two mathematical expressions is known as an equation.

Given,

⇒ 42−{(7+14)÷7}×4

⇒ 42 - { (21)÷7}×4

⇒ 42 - 3×4

⇒ 42 - 12

⇒ 30

Hence "The value of 42−{(7+14)÷7}×4 will be 30".

To learn more about expression

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Answer:

9:5 = 1428:x

ratios can also be written as fractions, so

9/5 = 1428/x

solve for x

9/5 × x = 1428

x = 1428 / (9/5)

x = 918

Answer:

5p + 4c = 20

Step-by-step explanation:

lets have p stand for the number of popcorn we buy and c stand for the number of candy we buy

you can only spend $20, so we know we need to set our equation equal to $20

now we take the price of of popcorn and multiply it p, the number of popcorn we buy. and we can do the same thing with candy.

so we end up with 5p + 4c = 20

Answer:

The total budget for their student film was $540

Step-by-step explanation:

The total percentage of any quantity is 100%

∵ A group of friends was working on a student film

∵ They spent all their budget on props and costumes

∴ The total budget of the props and costumes = 100%

∵ They spent $243 on props

∵ They spent 55% of the total budget on costumes

→ Find the percentage of the props

∴ The percentage of the props = 100% - 55%

∴ The percentage of the props of the total budget = 45%

→ That means 45% of the total budget = 243

∵ 45% × total budget = 243

→ Change the percent to a number by divide it by 100

∵ 45% = 45 ÷ 100 = 0.45

∴ 0.45 × total budget = 243

→ Divide both sides by 0.45

∴ The total budget = 540

∴ The total budget for their student film was $540

Answer:

154

Step-by-step explanation:

Answer:

(2/3,5/3)

Step-by-step explanation:

y= 5/3

x=2/3

Answer:

Step-by-step explanation:

1 in: 30 km

4.3 inches * 30km= 129 km

Since every inch is the same as 30 km.

Second problem

20 test: 163 mins

8.15 mins per test

44*8.15= 358.6 mins round to the nearest whole is 359 mins

Answer:

I read it.. I don't know.. It's just saying we can't really cheat, it's not too bad.

Answer:

a) The difference of a number and six is no less than 15

x - 6 ≥ 15

b) 25 plus a number is at least 13

25 + x ≥ 13

c) g decreased by 25 is at most five

g - 25 ≤ 5

Step-by-step explanation:

a) The difference of a number and six is no less than 15

Let the number be represented by x

We difference is involved in a mathematics question, it requires the application of Subtraction operation, hence:

x - 6 ≥ 15

b) 25 plus a number is at least 13

Let the unknown number be represented by x

When at least is used in Mathematics, is means greater than or equal to a particular value,

Hence,

25 + x ≥ 13

c) g decreased by 25 is at most five

At most means less than or equal to a particular value, hence:

g - 25 ≤ 5

Answer:

Select any expresion that equals 50.

Step-by-step explanation:

Divide 4500 by 90 and find all the expresions that equal 50.

the relationship is transitive

Answer:

rate of change is 2

Step-by-step explanation:

better thank this

Answer:

Your answer is: ↓

A) 8

B) 5

C) 6 / 13

Reduce the expression, if possible, by cancelling the common factors.

Step-by-step explanation:

Hope this helped : )

Answer:

the bags volume is 132 cubed inches. the candle is 37.5 cubed inches. there will need to be 94.5 packing material. they will need to buy 12 packages.

Step-by-step explanation:

5.5 times 3 times 8 is 132. 2.5 times 2.5 times 6 is 37.5. 132-37.5 is 94.5. 94.5 times 70 is 6615. 6615 divided by 575 is 11.5 (rounded). cant have half of a package so rounded to 12.

Answer:

c lolhahahahahahahahahahahahahahahahahahahahaha

Answer: c

Step-by-step explanation:

8.45 cm – 3.55 cm

Answer:

Step-by-step explanation:

a. Yes is proportional with the cost because they depend on one another

b. (0,0) means if we buy 0 cookies we pay $0

c. (1, 0.50) means that if we buy 1 cookie we have to pay $0.50

d. the unit rate is how much we pay for one cookie so is $0.50 per 1 cookie

Answer:

Line b and line c are perpendicular.

Step-by-step explanation:

In order to find if the lines are parallel, perpendicular or neither, their slopes have to be found.

Slope is denoted by m and is calculated as:

[tex]m = \frac{y_2-y_1}{x_2-x_1}[/tex]

Here (x1,y1) and (x2,y2) are the coordinates of the point through which the line passes.

Let m1 be the slope of line a

and line a passes through (−2, 1) and (0, 3)

[tex]m_1 = \frac{3-1}{0+2} = \frac{2}{2} = 1[/tex]

Let m2 be the slope of line b which passes through (4, 1) and (6, 4)

[tex]m_2 = \frac{4-1}{6-4} = \frac{3}{2}[/tex]

Let m3 be the slope of line c which passes through (1, 3) and (4, 1)

[tex]m_3 = \frac{1-3}{4-1} = \frac{-2}{3}[/tex]

When two lines are parallel, their slopes are equal.

When two lines are parallel, the product of their slope is -1

None of the slopes are equal to each other so none of the lines are parallel

And

[tex]m2.m3\\= \frac{3}{2} * -\frac{2}{3}\\= -1[/tex]

Hence,

Line b and line c are perpendicular.

Answer: good luck

Step-by-step explanation:

;)

Answer: x = 5

Step-by-step explanation:

Vertical angles are congruent. Hence, 30 = 6x. Diving both sides by 6 gives x=5

1::650(1.15)

2: 650(1.15)2

3: 650(1.15) t

1 The expression for the population in 2012 is 650(1.15)

2. The expression for the population in 2013 is [tex]650(1.15)^2[/tex]

3. The expression for the population after 2011 is [tex]650(1.15) ^t[/tex]

Since in the 2011 years, the population is 650

And, there is an increment of 15% in the year of 2012

1. So, the expression should be 650(1.15)

2. Now in the year 2013, it is [tex]650(1.15)^2[/tex]

3. And, after 2011 it is [tex]650(1.15) ^t[/tex]

Learn more about the population here: https://brainly.com/question/24309536

Answer:

The answer is 15 units is the answer boom

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Answer:

[tex]{:}\longrightarrow[/tex][tex]\sf 2x^3+20x^2+2ax^2+20ax [/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 2x^2 (x+10)+2ax (x+10)[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf (x+10)2x^2+2ax[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf (x+10)2x (x+a)[/tex]

[tex]{:}\longrightarrow[/tex][tex]\sf 2x (x+a)(x+10)[/tex]

Answer:

Only table C shows proportional relationship

Step by Step Explanation:

Given

Tables A, B an C

Required

Which table shows proportional relationship?

In table A .

x = 2 and y = 20

k = 20/2

k = 10

Also, x = 12, y = 132

k =. 132/12.

k = 11

Both values of k are not equal.

Hence, the table is not proportional

In table B

x = 5 and y = 20

k = 20/5

k = 4

Also, x = 7, y = 30

k =. 30/7

k = 4.29

Both values of k are not equal.

Hence, the table is not proportional

In table C

x = 9 and y = 90

k = 90/9

k = 10

Also, x = 14, y = 140

k =. 140/14

k = 10

Also, x = 24, y = 240

k =. 240/24

k = 10

All values of k are equal.

Hence, the table is proportional

Answer:

C.

Step-by-step explanation:

i tried it on khan and it said I was right trust me :)

Answer:

12,16

Step-by-step explanation:

multiple of 4

4,8,12,16

12+16=28

Answer: (7, 0)

Step-by-step explanation:

We have the system of equations:

9*x - y = 63

x = y + 7

We can see that the "x" is isolated in the second equation, then we can replace it in the first equation to get:

9*x - y = 63

9*(y + 7) - y = 63

Now we have an equation that only depends on one variable, so we can solve it:

9*y + 63 - y = 63

8*y + 63 = 63

8*y = 63 - 63 = 0

y = 0/8 = 0.

Now we know the value of y, we can replace this in one of the initial equations to find the value of x, i will replace this in the second equation:

x = y + 7 = 0 + 7 = 7

Then the point that is a solution for the system of equations is (7, 0)

Answer:

A. between o.1 and o.3

Step-by-step explanation:

Between 1 and 3, there's 2.

Answer: 10.5cm

Step-by-step explanation: the radius is half the diameter. 21/2=10.5

Answer:

109°

Step-by-step explanation:

To figure this problem out, we should start with the rule that a pentagon's angles add up to 540°. The angles in the given pentagon are 121°, 102°, 108° and 100°. To find x, we need to make sure all 5 angles add up to 540.

121°+ 102°+108° +100°+x=540°

If you add those four given angles, you get 431°.

540° - 431° = 109°