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4 years ago

Please help me on these questions and explain it thanks

Mathematics

1 answer:

Korolek [52]4 years ago

6 0

ABC = 180-120=60
ACB = 180-(40+60)=80
Therefore ECD= 80 as ACB and ECD are vertically opposite angles

the solution is A as that is where the graphs intersect each other

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Cm 33. What are the coordinates of point B? 2 4 6 C (2, 4) A (1, 2) D (4, 2) B (3, 3)

Andrei [34K]

The answer is C because you start at the x axis and if you go 2 over the B is on top and then when you go up, you have to go up 4 spaces to reach point B

6 0

3 years ago

Read 2 more answers

water freezes when the temperature is 0 degrees Celsius at what Fahrenheit temperature does water freeze

Oxana [17]

It is already given in the question that that freezing temperature of water is 0 degree Celsius. The freezing temperature of water in degree Fahrenheit is required to be found.
We know the relation between degree centigrade and degree Fahrenheit is"
Degree Fahrenheit = C(9/5) + 32
Here in the above equation "C" represents degree centigrade.
From the question we already know the freezing temperature of water as 0 degree Centigrade. Now we have to replace the value of Centigrade in the equation
Degree Fahrenheit = C(9/5) + 32
   = 0(9/5) + 32
   = 0 + 32
      = 32 degrees
So water freezes at 32 degrees Fahrenheit.

8 0

4 years ago

For what value of constant c is the function k(x) continuous at x = 0 if k =

nlexa [21]

The value of constant c for which the function k(x) is continuous is zero.

<h3>What is the limit of a function?</h3>

The limit of a function at a point k in its field is the value that the function approaches as its parameter approaches k.

To determine the value of constant c for which the function of k(x) is continuous, we take the limit of the parameter as follows:

$\mathbf{ \lim_{x \to 0^-} k(x) = \lim_{x \to 0^+} k(x) = 0 }$

$\mathbf{\implies \lim_{x \to 0 } \ \ \dfrac{sec \ x - 1}{x}= c }$

Provided that:

$\mathbf{\implies \lim_{x \to 0 } \ \ \dfrac{sec \ x - 1}{x}= \dfrac{0}{0} \ (form) }$

Using l'Hospital's rule:

$\mathbf{\implies \lim_{x \to 0} \ \ \dfrac{\dfrac{d}{dx}(sec \ x - 1)}{\dfrac{d}{dx}(x)}= \lim_{x \to 0} sec \ x \ tan \ x = 0}$

Therefore:

$\mathbf{\implies \lim_{x \to 0 } \ \ \dfrac{sec \ x - 1}{x}=0 }$

Hence; c = 0

Learn more about the limit of a function x here:

brainly.com/question/8131777

#SPJ1

5 0

2 years ago

How do I solve for y step by step

Makovka662 [10]

Answer:

the first question: y = x -10

the second question: y = 1/2 x - 3/2

Step-by-step explanation:

for the second equation:

1. x = 2y + 3

2. x - 3 = 2y

3. divide 2 on the whole equation

4. 1/2x - 3/2 = y

4. put it in slope-intercept form: y = 1/2x - 3/2

5 0

3 years ago

Es of two children are 11 and 8 years.

nikdorinn [45]

Answer:

<em>In 5 years the product of their ages will be 208</em>

Step-by-step explanation:

The age of two children is 11 and 8 years.

Let's call x the number of years ahead.

We need to find when the product of their future ages is 208. The 11 years old child will be 11+x years old and the other child will be 8+x years, thus:

(11+x)(8+x)=208

Operating:

$88+11x+8x+x^2=208$

Simplifying:

$x^2+19x-120=0$

Factoring:

(x-5)(x+24)=0

Solving:

x=5, x=-24

The negative solution is not valid, thus x=5

In 5 years the product of their ages will be 208

3 0

3 years ago