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3 years ago

100 POINTS pleasee i need help and explain too

Mathematics

2 answers:

julsineya [31]3 years ago

5 0

Answer:

$\frac{3 \sqrt{5} }{10}$

Step-by-step explanation:

Given the expression:

$\frac{3 \sqrt{20} }{5 \sqrt{16} }$

The expression can be written in the form below:

$= \frac{3 \sqrt{4 \times 5} }{5 \sqrt{4 \times 4} }$

Simplify further:

$= \frac{3 \times \sqrt{4 \times \sqrt{5} } }{5 \times 4} \\ = \frac{3 \times 2 \times \sqrt{5} }{5 \times 4} \\ = \frac{6 \sqrt{5} }{20} \\ = \frac{3 \sqrt{5} }{10}$

The correct choice is B.

marysya [2.9K]3 years ago

4 0

The answer is b to be sure

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3 years ago

Read 2 more answers

Please answer this is only algebra 1

Alexeev081 [22]

The numeric values for the given functions are as follows:

f(1/3) = 1/9.

g(4) = 8.

g(-3) = -6.

<h3>How to find the numeric value of a function or of an expression at a given point?</h3>

To find the numeric value of a function at x = a, we replace each instance of the variable, usually x, in the function by the desired value of a.

Function f(x) is defined by:

f(x) = x².

For the numeric value at x = 1/3, we replace the lone instance of x by 1/3, hence:

f(1/3) = (1/3)² = 1/9.

Function g(x) is defined by:

g(x) = 2x.

For the numeric value at x = 4, we replace the lone instance of x by 4, hence:

g(4) = 2(4) = 8.

For the numeric value at x = -3, we replace the lone instance of x by -3, hence:

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1 year ago

PLEASE HELP WILL MARK BRAINLIEST!!!!

MaRussiya [10]

(a) The variables are:

→ y is the total cost

→ x is the number of ride tickets

→ c is the price of the fair admission

(b) The linear equation that can be used to determine the cost for

anyone who only pays for ride tickets and fair admission is

y = 1.25 x + c

the value of x and the value of c = 5 does not change so the equation

can be used to determine the cost for anyone who only pays for ride

tickets and fair admission

(a) The slope of the line is $\frac{3}{4}$

(b) The equation of the line in point-slope form is:

y - 3 = $\frac{3}{4}$ (x + 4)

y = $\frac{3}{4}$ x + 6

The inequality that model the problem is:

20x + 10y ≥ 2000

Step-by-step explanation:

The given is:

1. The county fair charges $1.25 per ticket for the rides.

2. Jermaine bought 20 tickets for the rides and spent a total of $35.00

at the fair

3. Jermaine spent his money only on ride tickets and fair admission

4. The price of the fair admission is the same for everyone

Use y to represent the total cost and x to represent the number of

ride tickets

∵ The price of a ticket = $1.25

∵ The number of tickets = x

∵ y represents the total cost

∵ The total cost = the cost of a ticket × the number of tickets + the price

of the fair admission

∴ y = 1.25 x + c, where c is the fair admission

∵ Jermaine bought 20 tickets

∴ x = 20

∵ Jermaine spent a total of $35.00 at the fair

∴ y = 35

- Substitute these values in the equation in step b

∴ 35 = 1.25(20) + c

∴ 35 = 25 + c

- Subtract 25 from both sides

∴ c = 5

∵ c represents a constant term (y-intercept) in the linear equation

∴ The price of the fair admission for any one is $5

(a)

The variables are:

→ y is the total cost

→ x is the number of ride tickets

→ c is the price of the fair admission

(b)

The linear equation that can be used to determine the cost for

anyone who only pays for ride tickets and fair admission is

y = 1.25 x + 5

(c)

Because the equation is linear which means the value of y depends on

the value of x and the value of c = 5 does not change so the equation

can be used to determine the cost for anyone who only pays for ride

tickets and fair admission

A line goes through the points (-4 , 3) and (4 , 9)

The rule of the slope of a line is $m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

∵ $x_{1}$ = -4 and $x_{2}$ = 4

∵ $y_{1}$ = 3 and $y_{2}$ = 9

∴ $m=\frac{9-3}{4--4}=\frac{6}{8}=\frac{3}{4}$

(a)

The slope of the line is $\frac{3}{4}$

(b)

The point-slope form of the equation is $y-y_{1}=m(x-x_{1})$

∵ $y_{1}$ = 3 and $x_{1}$ = -4

∵ m = $\frac{3}{4}$

∴ y - 3 = $\frac{3}{4}$ (x - -4)

∴ y - 3 = $\frac{3}{4}$ (x + 4)

The equation of the line in point-slope form is:

y - 3 = $\frac{3}{4}$ (x + 4)

(c)

The slope-intercept form of the equation is y = mx + c, where c is the

y-intercept

∵ m = $\frac{3}{4}$

∴ y = $\frac{3}{4}$ x + c

- To find c substitute x and y by the coordinates of one of the two

given points

∵ x and y are the coordinates of point (4 , 9)

∴ 9 = $\frac{3}{4}$ (4) + c

∴ 9 = 3 + c

- Subtract 3 from both sides

∴ c = 6

∴ y = $\frac{3}{4}$ x + 6

The equation of the line in slope-intercept form is:

y = $\frac{3}{4}$ x + 6

Jacob and Sarah are saving money to go on a trip

The given is:

1. They need at least $2000 in order to go

2. Jacob mows lawns and Sarah walks dogs to raise money

3. Jacob charges $20 each time he mows a lawn and Sarah charges

$10 each time she walks a dog

4. x representing the number of lawns mowed and y representing the

number of dogs walked

∵ x representing the number of lawns mowed

∵ Jacob charges $20 each time he mows a lawn

∴ Jacob can earn $20x

∵ y representing the number of dogs walked

∵ Sarah charges $10 each time she walks a dog

∴ Sarah can earn 10y

∵ They need at least $2000 in order to go to the trip

∴ 20x + 10y ≥ 2000

The inequality that model the problem is:

20x + 10y ≥ 2000

Learn more:

You can learn more about inequality in brainly.com/question/6703816

brainly.com/question/10402163

#LearnwithBrainly

5 0

3 years ago