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3 years ago

What is the value of y

Mathematics

2 answers:

8090 [49]3 years ago

4 0

I need more info to answer this question

Semenov [28]3 years ago

4 0

The answer is 40 take 180 -50=130-10=120/3=40

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How do you simplify -3x²ym + 7x - 5ymx² + 16x

brilliants [131]

you cant add or subtract or multiply or divide if the variables arent the same so the simplified version of -3x²ym + 7x - 5ymx² + 16x would be
 -3x²ym - 5ymx² + 23x

3 0

4 years ago

Read 2 more answers

What is 18/40 in simplest form?

zaharov [31]

9/20 because you can divide them in half but you can divide them any further.

8 0

3 years ago

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There are 12 eggs in a carton .kim used 1/3 of eggs to make muffins .how many eggs did she use? Explain how you found your answe

marishachu [46]

The answer would be 4. Divide 3 by 12

5 0

3 years ago

I suck at math if you could help me with these questions that would be great

docker41 [41]

Answer:

Part 8) The triangles are not similar (see the explanation)

Part 12) The triangles are not similar (see the explanation)

Part 14) The area is increased by 125%

Part 15) $h=30\ ft$

Step-by-step explanation:

Part 8) we know that

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

Find the value of x in the larger triangle

The sum of the interior angles in any triangle must be equal to 180 degrees

$64^o+85^o+x=180^o$

$149^o+x=180^o$

$x=180^o-149^o$

$x=31^o$

Find the value of y in the smaller triangle

The sum of the interior angles in any triangle must be equal to 180 degrees

$26^o+85^o+y=180^o$

$111^o+y=180^o$

$y=180^o-111^o$

$y=69^o$

The corresponding angles of both triangles are not congruent

therefore

The triangles are not similar

Part 12) we know that

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

The measure of the interior angles of the triangle of the left are

88°

29° ----> by vertical angles

and

180°-(88°+29°)=63° ---> the sum of the interior angles in any triangle must be equal to 180 degrees

The measure of the interior angles of the triangle of the right are

180°-91°=89° ----> the sum of a exterior angle and a interior angle is equal to 180 degrees

29°

and

180°-(89°+29°)=62° ---> the sum of the interior angles in any triangle must be equal to 180 degrees

The corresponding angles of both triangles are not congruent

therefore

The triangles are not similar

Part 14) we know that

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

In this problem the scale factor is 1.5

Because

100%+50%=150%=150/100=1.5

The scale factor squared is $1.5^2=2.25$

That means that the new area is 2.25 times the original area

The area is increased by 125%

Part 15)

Let

h ----> the height of the pine

we know that

The height of the person divided by the length of his shadow is equal to the height of the pine tree divided by the length of its shadow

using proportion

$\frac{6}{3}=\frac{h}{15}$

solve for h

$2=\frac{h}{15}$

$h=2(15)=30\ ft$

6 0

3 years ago

PLEASE HELP ME!!!!!!!!!!!!!!!!!

attashe74 [19]

The missing angle is 28 degrees.
All triangles angles add up to 180 degrees.
47 + 31 = 78
180 - 78 = 102
102 + 50 = 152
180 - 152 = 28

4 0

3 years ago