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mrs_skeptik [129]
3 years ago
12

Please help, solve a and b

Mathematics
2 answers:
Troyanec [42]3 years ago
8 0

Answer:

The distance across the river d=175ft

Step-by-step explanation:

As◇ ABC& ◇ EDC are similar, BC/CD=AB/ DE

4x/7x=100/d

d=100×7/4=175

Darina [25.2K]3 years ago
7 0

Answer:

AE and BD use the same lines for both triangles so the angles for C are the same. this means that all the angles are congruent between both triangles.

Step-by-step explanation:

You might be interested in
Several ordered pairs from a continuous exponential function are shown in the table.
Sunny_sXe [5.5K]

Answer:

The domain is {x : x ∈ R} , the range is {y : y > 0}

Step-by-step explanation:

* Lets explain how to solve the problem

- The general form of the continuous exponential function is

  y=a(e)^{kx} where a is the initial value and k is the growth factor

- We have some ordered pairs from the continuous exponential

  function

- The ordered pairs are:

  (0 , 4) , (1 , 5) , (2 , 6.25) , (3 , 7.8125)

- Lets substitute the values of x and y in the equation to find a , e^{k}

∵ y=a(e)^{kx}

∵ x = 0 and y = 4 ⇒ 1st ordered pair

- Substitute x and y in the equation

∴ 4=a(e)^{k(0)}

∴ 4=a(e)^{0}

- The value of e^{0} = 1

∴ a = 4

- Substitute the value of a in the equation

∴ y=4(e)^{kx}

∵ x = 1 and y = 5 ⇒ 1st ordered pair

- Substitute x and y in the equation

∴ 5=4(e)^{k(1)}

∴ 5=4(e)^{k}

- Divide both sides by 4

∴ e^{k} = 1.25

- Substitute the value of e^{k} in the equation

∴ y=4(1.25)^{x}

- The domain of the function is all the values of x which make the

  function defines

- The range is the values of y corresponding to x

∵ There is no value of x makes the function undefined

∴ <u><em>The domain is all real numbers</em></u>

∵ y never takes a negative value

∴ <u><em>The range is all the real positive numbers</em></u>

* <em>The domain is {x : x ∈ R} , the range is {y : y > 0}</em>

4 0
2 years ago
Read 2 more answers
Can anyone solve this? I'm having a hard time
bearhunter [10]
A good app that would help you with math is photomath
8 0
3 years ago
Read 2 more answers
Mrs. Johnson measured 3 rectangular rooms that she wants to tile. What is the total area of the​ rooms?
stich3 [128]

Answer:

Find the area of each room and add the areas

Step-by-step explanation:

Please find the full question in the attached image

the area of rectangle is length x breadth. The area of each room would be found and the three areas would be added together

for example ,

dimension of room 1 = 5 x 3

dimension of room 2 = 2 x 3

dimension of room 3 = 4 x 5

area of room 1 = 15

area of room 2 = 6

area of room 3 = 20

total area = 15 + 6 + 20 = 41

6 0
3 years ago
Find the rate of markup if a book cost the retailer 17.50 and sells for $24.95. Round the the nearest tenth if needed
CaHeK987 [17]

Mark up = profit ÷ cost


Let M = mark up


Let p = profit


Let c = cost


M = p/c


Take it from here.


4 0
3 years ago
What is the answer to this?
yawa3891 [41]

Answer:

5

Step-by-step explanation:

8 0
3 years ago
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