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Inga [223]
3 years ago
10

Please help..please.12th grade math with explanation pleaseee​

Mathematics
1 answer:
Yuliya22 [10]3 years ago
5 0

Answer:

x = 9

Step-by-step explanation:

∠B = 5x and ∠E = 45°

If the triangles are the same, 45 divided by 5 would be 9.  Thus, x = 9

Hope this helps :)

You might be interested in
What is 7/8 divided by 1/8
eduard

Answer:

7

Step-by-step explanation:

<u>Concepts:</u>

  • Division: a system of distributing a collection of things into equal parts
  • Fractions: #s that represent a part of a whole
  • Dividing Fractions: dividing a fraction by another fraction = multiplying the fraction by the inverse (reciprocal) of the other one
  • Inverse Operations: operations that are opposite of each other (e.g. inverse of addition is subtraction)

<u>Solving:</u>

1. First, let's set up the equation:

7/8 ÷ 1/8

2. We can get the reciprocal of 1/8 by doing the opposite of division; multiplication. 1/8 becomes 1 · 8, and that's equal to 8.

3. Now, since we know dividing a fraction by another one is exactly the same as multiplying the fraction by the reciprocal of the other, let's multiply 7/8 by the inverse of 1/8, which is 8.

7/8 · 8 = 56/8 = 7

Therefore, 7/8 divided by 1/8 is equal to <u>7</u>.

8 0
3 years ago
How many solutions does this system of equations have?<br><br> y = –2x + 2<br> 2y + 4x = 4
Rama09 [41]

Step-by-step explanation:

First we solve it.

I'll use substitution.

In the first equation y equals -2x+2 so we can apply that to the second equation

2y + 4x = 4

2(-2x+2) + 4x = 4

distribute

-4x+4+4x=4

simplify

4=4

To figure out how many solutions it has:

•If both side of the equal sign are exactly the same: Infinitely many

ex: 6x=6x

•If both sides of the equal sign do not match when completely simplified: No solutions

ex: 3x=-5x

•If it creates an equation: 1 solution

ex: x=3+2y

Since both sides of the equal sign are 4, we have infinitely many solutions.

Hope this helps! If you have any questions on how I got my answer feel free to ask. Stay safe!

7 0
3 years ago
A 20 meter ladder rests vertically against the side of a barn. A pig that has been hitched to the ladder starts to pull the base
kirill115 [55]

Answer:

I hope my drawing explains well lol... h = 16

Step-by-step explanation:

So basically first you need to find x (the one in the drawing), by doing so, you just have to use the formula,

speed =  \frac{distance}{time}

You substitute in the speed and the time given,

0.4 =  \frac{x}{30}  \\ x = 12

Then, you use the Pythagorean theorem,

h =  \sqrt{ {20}^{2}  -  {12}^{2} } \\  h = 16

7 0
3 years ago
Write the inverse of 5x – 17 = 11 + 3y in f–1(x) notation.
nekit [7.7K]

Answer:


Step-by-step explanation:

MSDCNMDVNDV,SNXDLSDHRFHN


6 0
3 years ago
Calculate the rf value for the reactant b spot. estimate the ruler to the nearest tenth, report the answer using two significant
Aliun [14]
<span>1. Measure the distance the solvent front traveled from the baseline (m1). 2. Measure the distance the reactant b spot traveled (the center of the spot) (m2). 3. To determine the rf, divide (m2/m1). 4. Significant figures- use 2 so the answer should be written to the hundredths place as the spot will not travel farther than the solvent front.</span>
8 0
3 years ago
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