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SVETLANKA909090 [29]
3 years ago
8

The diagram is a straightedge and compass construction. A is the center of one circle,

Mathematics
1 answer:
mel-nik [20]3 years ago
5 0

Answer:

All the points are the same distance from the center of line AB, therefore it is just the same triangle but rotated. They are the same triangle .

Step-by-step explanation:

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Giving brainly if both are done and correct​
pshichka [43]

Answer:

A.) -84

B.) -6

Step-by-step explanation:

I hope I helped! ^-^

7 0
2 years ago
2 sin^2 (x) -5 sin (x) -3=0
andreyandreev [35.5K]

we have that

2sin^{2} x-5sin x-3=0

I. Rewrite the equation by substituting the expression u in for sin x.

2u^{2} -5u-3=0

II. Factor the quadratic expression. Rewrite the equation with factors instead of the original polynomial.

2u^{2} -5u-3=0 is equal to

using a graph calculator-----> see the attached figure

(u-3)*(2u+1)=0

III. Use the zero product property to solve the quadratic equation.

(u-3)*(2u+1)=0

(u-3)=0--------------> u=3

(2u+1)=0-------- 2u=-1------> u=-1/2-----> u=-0.5

IV. Rewrite your solutions to Part III by replacing u with sin x.

sin x=3--------> is not the solution (sin x can not be greater than 1)

sin x=-0.50------>is the solution

V. Solve the remaining equations for x, giving all solutions to the equation.

sin x=-0.50

if the sine is negative

then

x belong to the III or IV quadrant

we know that

sin 30°=0.50

so

the solution for the III quadrant is

x=180°+30°-------> x=210°

the solution for the IV quadrant is

x=360°-30°------> x=330°

5 0
3 years ago
To travel 80 miles, it takes Sue, riding a moped, 2 hours less time than it takes Doreen to travel 60 miles riding a bicycle. Su
andriy [413]

Answer:

Time taken by Doreen is 6 hours and speed is 10 miles per hour.

Time taken by Sue is 4 hours and speed is 20 miles per hour.

Step-by-step explanation:

Let the speed of Doreen be x

According to the question  speed of Sue   is = x+10

time  taken By Sue to cover 80 miles = \frac{80}{x+10}

time taken by Doreen to travel 60 miles = \frac{60}{x}

According to question Sue take two hours less than Doreen takes

therefore

\frac{60}{x} - \frac{80}{x+10} =2

\frac{60(x+10)-80x}{x(x+10)} =2

60(x+10) -80x = 2(x(x+10)

60x+600-80x = 2x^2+20x\\

simplifying it ,we get

2x^2+40x-600=0\\

Dividing both sides by 2 ,we get

x^2+20x-300=0\\

solving it for x ,we get

(x+30)(x-10) =0

x =-30 which is not possible

x =10 miles per hour

Speed of Doreen = 10 miles per hour

Speed of Sue = 10+10 = 20 miles per hour

Time taken by Doreen = 60 divided by 10 = 6 hours

Time taken  by Sue = 80 divided by 20 = 4 hours

5 0
3 years ago
The roof of a shack is drawn below (not to scale). What is the slope of the roof? ​
Natalka [10]

Answer:

2/3.......... :)

7 0
3 years ago
Read 2 more answers
Use the expression 5x + 23 to match the following vocabulary words.
andriy [413]

From the expression 5x^23, we identify the terms as follows:

5 = coefficient 

x = variable 

23 = exponent

x = base

The coefficient is the constant in the term, the variable is any letter in a term, the exponent is the the number of times a number is being multiplied by itself in a power and the base is the number being multiplied in a power.

plz mark me as brainliest :)

6 0
3 years ago
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