How to not get ads on brainly

80 books to 64 books. What's the percent of change?

Hoochie [10]

Answer:

A change from 64 to 80 represents a positive change (increase) of 25%

Step-by-step explanation:

3 0

3 years ago

Please help me im so confused

pantera1 [17]

<h3>Answer: 1/4</h3>

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

Explanation:

Let's say there are 60 members at the club. I picked this value since 10*6 = 60, which is the product of the denominators. This will help give us whole numbers in the steps shown below. You can pick any number you want for the club size.

Since we have 60 members and 3/10 of them are men, this means (3/10)*60 = 18.

So there are 18 men at this club.

--------------

Next, we're told that 5/6 of the men are right handed. So (5/6)*18 = 15 men are right handed.

Lastly, we divide that last result (15) over the total number of club members (60) and we end up with 15/60 = (1*15)/(4*15) = 1/4

Therefore, 1/4 of the members are men who are right handed.

Unfortunately, we don't have enough data to be able to say anything about what fraction of the women are right handed.

--------------

Note that:

(3/10)*(5/6) = (3*5)/(10*6) = 15/60 = 1/4

which is an alternative pathway to the solution.

4 0

3 years ago

One leg of a right triangle is 1 inch longer than the other leg. The hypotenuse has a length of 5 inches. Find the length of the

liubo4ka [24]

So this is the answer because 4 is 1 more than 3however, you need to have the work, so...n and n+1 are the legs5^2=n^2+(n+1)^225=n^2+n^2+2n+12n^2+2n+1-25=02n^2+2n-24=0divide both sides by 2n^2+n-12=0factor(n+4)(n-3)=0n-3=0n=3 inchesn+1=4 inches

5 0

3 years ago

2. Which expression is equivalent to 11-4x118?

tekilochka [14]

The answer to your question is C, 11^4

7 0

3 years ago

Las imágenes están en el orden de las preguntas

Vesna [10]

Answer:

Part 1)

a) True (see the explanation)

b) True (see the explanation)

Part 2) The width of the river is 64.75 units

Part 3) see the explanation

Part 4) see the explanation

Step-by-step explanation:

<u><em>The question is English</em></u>

The images are in the order of the questions

1. Reason whether the following statements are true or false. (In either case, write down why)

a. Two equilateral triangles are always similar

b. The value of x is 4 cm

2. Calculate the width of the river

3. In the following figure, indicate which triangles are similar and which are not.

4. How tall is the statue?

Part 1) Reason whether the following statements are true or false. (In either case, write down why)

Part a) Two equilateral triangles are always similar

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent.

An equilateral triangle has three equal sides and three equal interior angles (the measure of each interior angle is 60 degrees)

so

Two equilateral triangles will always have the corresponding congruent angles, therefore they will always be similar

therefore

The statement is true

Part b) The value of x is 4 cm

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent.

In this problem

The smaller triangle is similar with the larger triangle by AA Similarity Theorem

so

$\frac{1.5}{1.5+3}=\frac{2}{x+2}$

solve for x

$\frac{1}{3}=\frac{2}{x+2}$

$x+2=6\\x=4\ cm$

therefore

The statement is true

Part 2) Calculate the width of the river

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent.

In this problem

The two triangles are similar by AA Similarity Theorem

Applying proportion

$\frac{x}{7}=\frac{37}{4}$

solve for x

$x=\frac{37}{4}(7)$

$x=64.75\ units$

Part 3) In the following figure, indicate which triangles are similar and which are not

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent.

In this problem

Triangle ABO is similar with triangle A'B'O by AA Similarity Theorem (side AB is parallel to side A'B')

Triangle ABO is not similar with triangle A''B''O (corresponding angles are not congruent)

Triangle A'B'O is not similar with triangle A''B''O (corresponding angles are not congruent)

Part 4) How tall is the statue?

we know that

If two figures are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent.

In this problem

The smaller triangle and the larger triangle are similar by AA Similarity Theorem

so

Applying proportion

Let

h ----> the height of the statue from the pedestal in meters

$\frac{h}{2.1-1.6}=\frac{4.6+0.9}{0.9}$

solve for x

$\frac{h}{0.5}=\frac{5.5}{0.9}$

$h=\frac{5.5}{0.9}(0.5)$

$h=3.06\ m$

The height of the statue from the ground is

$3.06+1.6=4.66\ m$

Round to the nearest tenth

$4.7\ m$

8 0

3 years ago