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3 years ago

Simplify the following expression

Mathematics

1 answer:

gladu [14]3 years ago

3 0

Second bubble reasoning a^3-4a^3=-3a^3
-2a^2+3a^2=a^2 hope this helps

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Find the missing length marked with a question mark.<br> UVW-USR

mariarad [96]

Given:

$\Delta UVW\sim \Delta USR$

To find:

The missing length marked with a question mark.

Solution:

Let x be the missing value.

We have,

$\Delta UVW\sim \Delta USR$

Corresponding sides of similar triangles are proportional, so

$\dfrac{UV}{US}=\dfrac{VW}{SR}=\dfrac{UW}{UR}$

Using this, we get

$\dfrac{UV}{US}=\dfrac{UW}{UR}$

On substituting the values, we get

$\dfrac{70}{x}=\dfrac{55}{44}$

$\dfrac{70}{x}=\dfrac{5}{4}$

On cross multiplication, we get

$70\times 4=5\times x$

$280=5x$

$\dfrac{280}{5}=x$

$56=x$

Therefore, the missing length is 56 units.

3 0

3 years ago

I don't understand?<br><br>

Svetach [21]

Answer:

see explanation

Step-by-step explanation:

The perimeter (P) is the length of all 3 sides of the triangle

The triangle is isosceles with 2 equal sides 20 - 7xy

P = 20 - 7xy + 20 - 7xy + 12 = 52 - 14xy

When x = 2, y = 1, then

P = 52 - 14(2)(1) = 52 - 28 = 24

5 0

4 years ago

If ED = 5y + 6 and DB = y + 30, find the value of y. Then find ED, DB, and EB.

Gemiola [76]

Answer:

Part 1) The value of y=6

Part 2) ED=36, DB=36 and EB=72

Step-by-step explanation:

In this problem we know that

ED=DB -----> equation A

EB=ED+DB -----> equation B

The point D is the midpoint ED

see the attached figure to better understand the problem

step 1

Find the value of y

Substitute the given values in the equation A

$5y+6=y+30$

solve for y

$5y-y=30-6$

$4y=24$

$y=6$

step 2

Find the value of ED,DB and EB

$ED=5y+6$

substitute the value of y

$ED=5(6)+6=36$

Remember that

ED=DB

therefore

$DB=36$

Find the value of EB

EB=ED+DB

$EB=36+36=72$

3 0

3 years ago

PLEASE HELP,, MARKING BRAINLIEST!!!<br><br> Solve for the value of x.

iris [78.8K]

Answer:

$\huge\boxed{\sf x = 37}$

Step-by-step explanation:

We know that,

The sum of interior angles of a triangle is 180 degrees.

So,

2x + 4 + 2x - 9 + x = 180

5x - 5 = 180

Add 5 to both sides

5x = 180 + 5

5x = 185

Divide both sides by 5

x = 185 / 5

x = 37

$\rule[225]{225}{2}$

Hope this helped!

3 0

4 years ago

9. I am a 3-digit number. My hundreds digit is the square of my ones digit. My tens digit is the product of my hundreds digit an

aniked [119]

Answer:

482

Step-by-step explanation:

4 is the square of 2 and 2*4 = 8.

4 0

3 years ago