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2 years ago

I'm new to brainly. What do I do?

Mathematics

2 answers:

Ludmilka [50]2 years ago

4 0

Answer:

You basically ask questions and answer them as best you can. That is really it!

Step-by-step explanation:

Bogdan [553]2 years ago

3 0

Answer:

Hi!

I'm new too but I kind of have the gist of things. Basically, this is a platform where students can help out other students with different academic subjects. So, you can ask a question on this app/website and someone would try their best to answer it for you. Or, you can help answer other people's questions. Hope this answers your question!

- Fellow brainly user

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3 pounds of apples cost $8.37 how much each pound

Nadya [2.5K]

Answer:

$2.79 per pound of apple.

Step-by-step explanation:

$\frac{3}{8.37}=\frac{1}{x}$

$3x = 8.37$

$x = 2.79$

5 0

2 years ago

Unit Rates: One person walks 9/20 miles in each 3/4 hour. Another person walks 8/15 miles in each 2/3 hour. Who is faster?

lorasvet [3.4K]

Answer:

Person 2

Step-by-step explanation:

Person 1 has a rate of .45 in 3/4 hour, and Person 2 has a rate of .53 in 2/3 hour. 2/3 is less than 3/4 and 0.53 is bigger than 0.45.

3 0

3 years ago

3. Diego drew a scaled version of a Polygon P and labeled it Q.

bogdanovich [222]

Answer:

The scale factor used to go from P to Q is 1/4

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

If two figures are similar, then the ratio of its areas is equal to the scale factor squared

Let

z ----> the scale factor

x -----> area of polygon Q

y -----> area of polygon P

$z^{2}=\frac{x}{y}$

we have

$y=72\ units^2$

Find the area of polygon Q

Divide the the area of polygon Q in two triangles and three squares

The area of the polygon Q is equal to the area of two triangles plus the area of three squares

see the attached figure N 2

Find the area of triangle 1

$A=(1/2)(1)(2)=1\ units^2$

Find the area of three squares (A2,A3 and A4)

$A=3(1)^2=3\ units^2$

Find the area of triangle 5

$A=(1/2)(1)(1)=0.5\ units^2$

The area of polygon Q is

$x=1+3+0.5=4.5\ units^2$

Find the scale factor

$z^{2}=\frac{x}{y}$

we have $y=72\ units^2$

$x=4.5\ units^2$

substitute and solve for z

$z^{2}=\frac{4.5}{72}$

$z^{2}=\frac{1}{16}$

square root both sides

$z=\frac{1}{4}$

therefore

The scale factor used to go from P to Q is 1/4

6 0

3 years ago

Rema purchased 18 ounces of gold in 2005 for $414 per ounce in order to try to diversify her investment portfolio. She sold a th

Licemer1 [7]

Given :

Rema purchased 18 ounces of gold in 2005 for $414 per ounce in order to try to diversify her investment portfolio.

She sold a third of her holdings in gold in 2009 at a price $953 per ounce. She sold the rest of her gold holdings in 2010 for $1,367 per ounce.

To Find :

What is Prema’s profit in 2009 and 2010.

Solution :

Price of one third ounces of gold, in 2005 is :

P = $414/3 = $138 .

Profit from selling them in 2009 is :

P1 = $(953 - 138) = $815 .

Profit from selling them in 2010 is :

P2 = $( 1367 - ( 414 - 138 ) ) = $1091 .

Therefore, Prema's profit in 2009 is $815 and 2010 is $1091.

Hence, this is the required solution.

5 0

3 years ago

Consider triangle QRS. The legs each have a length of 10 units. Triangle Q R S is shown. Angle Q S R is 90 degrees. The length o

Ipatiy [6.2K]

Answer:

10 square root 2

Step-by-step explanation:

5 0

3 years ago