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3 years ago

What is the square root of 25? Also, what does square root mean?

2 answers:

6 0

The square root of 25 is 5

The square root of something is what times the same number equals something. For example the square root of 25 is 5 because 5x5 = 25

The square root of 16 would be 4 because 4x4 = 16, and so on.

Square roots that don't equal a specific number are solvable, but that's a whole different lesson.

Hoped I was able to help :)

mariarad [96]3 years ago

3 0

5 is the square root of 25. Square root means a number that makes some quantity when multiplied by itself. 5x5=25 just like 4 is the square root of 16, since 4x4=16

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Sandy charges each family that she babysits a flat fee of 10$ for the night and an extra 5$ per child kimmi charges 25$ per nigh

Rudiy27

Sandy's cost equation is y = 5x + 10 where y = cost and x = number of children.
Kimmi's cost equation is y = 25 where y = cost.
The fees are the same when x = 3 in other words when Sandy babysits 3 children.
That is found by solving 5x + 10 = 25 for x.
Subtract 10 from each side: 5x = 15
Divide by 5 on both sides: x = 3

5 0

4 years ago

Solve the problem of exponential growth. In 1985 an antique automobile club had 23,000 members. Since then its membership has gr

Helen [10]

Answer:

$127,000\ members$

Step-by-step explanation:

In this problem we have an exponential function of the form

$f(x)=a(b)^{x}$

where

a is the initial value

b is the base

The base is equal to

b=1+r

r is the average rate

In this problem we have

a=23,000 members

r=5%=5/100=0.05

b=1+0.05=1.05

substitute

$f(x)=23,000(1.05)^{x}$

x ----> is the number of years since 1985

How many members will there be in 2020?

x=2020-1985=35 years

substitute in the function

$f(x)=23,000(1.05)^{35}=126,868\ members$

Round to the nearest thousand

$126,868=127,000\ members$

4 0

3 years ago

If c is the line segment connecting (x1,y1) to (x2,y2), show that the line integral of xdy-ydx=x1y2-x2y1......this is in a chapt

MatroZZZ [7]

Green's theorem doesn't really apply here. GT relates the line integral over some *closed* connected contour that bounds some region (like a circular path that serves as the boundary to a disk). A line segment doesn't form a region since it's completely one-dimensional.

At any rate, we can still compute the line integral just fine. It's just that GT is irrelevant.

We parameterize the line segment by

$\mathbf r(t)=\langle x_1,y_1\rangle(1-t)+\langle x_2,y_2\rangle t$
$\implies\mathbf r(t)=\langle x_1+(x_2-x_1)t,y_1+(y_2-y_1)t\rangle$

with $0\le t\le1$ . Then we find the differential:

$\mathbf r(t)\equiv\langle x,y\rangle=\langle x_1+(x_2-x_1)t,y_1+(y_2-y_1)t\rangle$
$\implies\mathrm d\mathbf r\equiv\langle\mathrm dx,\mathrm dy\rangle=\langle x_2-x_1,y_2-y_1\rangle\,\mathrm dt$

with $0\le t\le1$ .

Here, the line integral is

$\displaystyle\int_{\mathcal C}x\,\mathrm dy-y\,\mathrm dx=\int_{\mathcal C}\langle-y,x\rangle\cdot\langle\mathrm dx,\mathrm dy\rangle$
$=\displaystyle\int_{t=0}^{t=1}\langle-y_1-(y_2-y_1)t,x_1+(x_2-x_1)t\rangle\cdot\langle x_2-x_1,y_2-y_1\rangle\,\mathrm dt$
$=\displaystyle\int_{t=0}^{t=1}(x_1y_2-x_2y_1)\,\mathrm dt$
$=(x_1y_2-x_2y_1)\displaystyle\int_{t=0}^{t=1}\,\mathrm dt$
$=x_1y_2-x_2y_1$

as required.

4 0

4 years ago

What is the next term in the sequence 34,27,20,13

Sav [38]

The next term in the sequence is 6, as each term is reduced by 7 each time. =)

4 0

3 years ago

Read 2 more answers

Solve for the value of z.

Gnom [1K]

Answer:

13°

Step-by-step explanation:

2z + 5° + 5z - 6° = 90° { being complementary angles }

7z = 90° + 1°

7z = 91°

z = 91° / 7

z = 13°

Hope it will help :)

3 0

3 years ago

Read 2 more answers