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2 years ago

PLZZZZZ NEED HELP!!!!!!!

Mathematics

2 answers:

andriy [413]2 years ago

6 0

15 cm because they are similar, and EF is the same line as BC

VLD [36.1K]2 years ago

6 0

Set up a ratio between corresponding sides

9/12 = 15/x - the cross product will be equal since the fractions are equal

9x = 180
x = 180/9 = 20

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Let a, b, c, and d be real numbers with a, c 6= 0. Prove that the lines y = ax+b and y = cx + d have the same x-intercept if and

Monica [59]

Step-by-step explanation:

We have got the lines :

$y=ax+b\\y=cx+d$

Both lines intercept the x-axis in the point :

$I = (i_{1} ,i_{2})$

In all point from x-axis the y-component is equal to 0.

$I=(i_{1},o)$

We replace the I point in the lines equations:

$0=a(i_{1})+b \\0=c(i_{1})+d$

From the first equation :

$0=a(i_{1})+b \\-b=a(i_{1})\\i_{1}=\frac{-b}{a}$

From the second equation :

$0=c(i_{1})+d\\ -d=c(i_{1})\\i_{1}=\frac{-d}{c}$

Then $i_{1}=i_{1}$

Finally :

$\frac{-b}{a}=\frac{-d}{c} \\\frac{b}{a}=\frac{d}{c} \\ad=bc$

y = ax + b and y = cx + d have the same x-intercept ⇔ad=bc

8 0

2 years ago

What is fixed perimiter

Kryger [21]

This means the length of the side of an area, a rectangle, for example, is always the same.

Hope this helps!

8 0

2 years ago

Read 2 more answers

What is the greatest common factor of 24, 40 and 32? A. 1 B. 2 C. 4 D. 8

trasher [3.6K]

It’s 8 because 24/8 is 3 and 40/8 is 5 and 32/8 is 4 so the answer is 8 YOUR WELCOME

6 0

2 years ago

Read 2 more answers

What is the value of x in the equation LaTeX: \frac{3}{2}\left(4x-2\right)-3x=5-\left(x+2\right) 3 2 ( 4 x − 2 ) − 3 x = 5 − ( x

Helen [10]

Answer:

3/2

Step-by-step explanation:

Given the equation 3/2(4x-2)-3x = 5-(x+2)

Open the parenthesis

3/2(4x) - 3/2(2) -3x = 5-x-2

6x-3-3x = 3-x

3x-3 = 3-x

Collect like terms

3x+x = 3+3

4x = 6

Divide both sides by

4x/4 = 6/4

x = 3/2

Hence the value of x is 3/2

6 0

2 years ago

A bag contains 10 red marbles, 6 blue marbles, and 4 green marble.

Salsk061 [2.6K]

Answer:

7/10 or 70%.

Step-by-step explanation:

There is a total of 20 marbles in the bag.

There are 10 + 4 = 14 marbles which are not blue.

The required probability = 14/20

= 7/10.

6 0

2 years ago