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lidiya [134]
4 years ago
9

BRAINLIEST. NEED HELP NOW!!! What is the value of x?

Mathematics
1 answer:
Arturiano [62]4 years ago
3 0

Answer:

x=10

Step-by-step explanation:

these are similar triangles

8             12

------   = -----------

x+4          2x+1


using cross products

8* (2x+1) = 12(x+4)

distribute

16x + 8 = 12x+48

subtract 12x from each side

16x-12x +8 = 12x-12x+48

4x+8 = 48

subtract 8 from each side

4x+8-8 = 48-8

4x = 40

divide by 4

4x/4 = 40/x

x =10

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loris [4]

Answer:

7i) 140  7ii) 80  7iii) 60  8i) isosceles  8ii) 74  8iii) 60  8iv) 46 degrees  9i) 56  

9ii) 80  9iii) 62  10) Angle c is 64 degrees. Angle d is 26 degrees

Step-by-step explanation:

7i) Add up all the interior angles. Since the triangle is isosceles, there are two 70 degree angles. The exterior angle is equal to the two 70 degree angles together, or 140 degrees.

7ii) Add up all the interior angles. Since the triangle is isosceles, there are two 40 degree angles. The exterior angle is equal to the two 40 degree angles together, or 80 degrees.

7iii) Add up all the interior angles. Since the left triangle is isosceles, there are two 30 degree angles. The exterior angle is equal to the two 30 degrees angles together, or 60 degrees.

8i) This is an isosceles triangle because two of the sides are the same length.

8ii) Since the triangle is isosceles, there are two 74 degree angles, and angle BDC is one of them.

8iii) Since the triangle is equilateral, all of the angles equal 60 degrees. This means that angle DAB is 60 degrees.

8iv) Add together 60 degrees from the equilateral and 74 degrees from the isosceles triangle and subtract that sum from 180. 180 - (60 + 74) = 46 degrees.

9i) Angles x and 56 are consecutive interior angles, which means they are the same measure.

9ii) Since the triangle is isosceles, two of the angles are 50 degrees, so subtract 100 from 180 to find the other angle. 180 - 100 = 80 Angles 80 and x are alternate interior angles, which means they are the same measure.

9iii) Angle is has a measure of 62 degrees because the two triangles are the same except for the size, which doesn't matter.

10) Since the left triangle is isosceles, there are two 58 degree angles, so subtract the sum of the two angles from 180. 180 - 116 = 64 degrees  Looking at the triangle on the right, add together the 64 and 90 degree angles and subtract from 180 to find the measure of angle d. 180 - 154 = 26 degrees

If these answers are correct, please make me Brainliest!

5 0
3 years ago
Shawna is practicing typing. She types 456 words in 10 minutes.If she types the same number of words each minute how many words
Svetradugi [14.3K]

Answer:

456 / 10 = <u>45.6</u>

So the answer lies between <u>45</u> and <u>46</u>.

6 0
3 years ago
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LekaFEV [45]
The zero product property tells us that if the product of two or more factors is zero, then each one of these factors CAN be zero.

For more context let's look at the first equation in the problem that we can apply this to: (x-3)(x+4)=0

Through zero property we know that the factor (x-3) can be equal to zero as well as (x+4). This is because, even if only one of them is zero, the product will immediately be zero.

The zero product property is best applied to factorable quadratic equations in this case.

Another factorable equation would be 2x^{2}+6x=0 since we can factor out 2x and end up with 2x(x+3)=0. Now we'll end up with two factors, 2x and (x+3), which we can apply the zero product property to.

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Answer:

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Let the total number of trees be x.

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or,(75/100)*x=30

or,x=(30*100)/75

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