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2 years ago

DE =8 CM DE = 4 CM DE = 10 CM DE = 6CM

Mathematics

2 answers:

Svetradugi [14.3K]2 years ago

8 0

Answer:

just add

Step-by-step explanation:

Marianna [84]2 years ago

8 0

Answer:

DE = 6 cm

Step-by-step explanation:

The problem states these triangles are similar. Line BC is half the length of Line AB. So, Line DE should be half the length of Line AD.

Therefore, Line DE = 6 cm

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Solve the following:<br>a) 2(5x – 3) = 24<br>b) 5(2x + 1) = 50

likoan [24]

Answer:

x = 3 and x = $\frac{9}{2}$

Step-by-step explanation:

(a)

2(5x - 3) = 24 ( divide both sides by 2 )

5x - 3 = 12 ( add 3 to both sides )

5x = 15 ( divide both sides by 5 )

x = 3

(b)

5(2x + 1) = 50 ( divide both sides by 5 )

2x + 1 = 10 ( subtract 1 from both sides )

2x = 9 ( divide both sides by 2 )

x = $\frac{9}{2}$

3 0

2 years ago

What is 7/8 in decimal

Pachacha [2.7K]

To get a decimal form of a fraction, divide the numerator by the denominator.
7/8 = 0.875

6 0

2 years ago

A test consists of 100 multiple choice questions, each with five possible answers, only one of which is correct. Find the mean a

TEA [102]

Answer: Mean = 20 and standard deviation = 4

Step-by-step explanation:

Let x represents the success of getting the correct answer.

Here, the total number of trials(n) = 100

The probability of getting the correct answer, p = 1/5

Thus, the mean of the number of correct answer,

$\mu_x= np$

$\mu_x= 100\times 1/5$

$\mu_x= 20$

Now, the standard deviation, $\sigma_x= \sqrt{n\times p\times (1-p)}$

$\sigma_x= \sqrt{100\times 1/5\times 4/5}$

$\sigma_x= \sqrt{16}$

$\sigma_x= 4$

Thus, First option is correct.

6 0

3 years ago

9999999999999999999999999999999999999+888888888888888888888888888888888888

alexandr1967 [171]

Answer:

a lot

Step-by-step explanation:

3 0

3 years ago

Is the equation -x=1-y and 2+y=x+1 coincident, intersecting, or parallel

yarga [219]

$\bf x=1-y\implies x+y=1\implies y=-x+1\\\\
-------------------------------\\\\
2+y=x+1\implies y=x+1-2\implies y=x-1$

notice the equations in slope-intercept form, the first one has a slope of -1, the second one has a slope of 1.

if the slopes are equal, and the constant is different, they lines are parallel.

if the slopes are equal, and the constant is the same the equations are exactly the same thing, and the lines are coincident, on slapped on top of the other.

if the slopes differ, like here, then they have a solution, where they intersect.

4 0

2 years ago