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klasskru [66]
3 years ago
7

2. The absolute value of -8 is 8.

Mathematics
1 answer:
liraira [26]3 years ago
8 0
2. The absolute value of -8 is 8. True
3. An isosceles triangle has three congruent sides.
 Nope. It has two

  4. The cosine is the ratio between the length of the opposite leg to the length of the hypotenuse.
 I have no idea.

 5. The boiling point of water is 212°C.
true

 
6.
The expression 28xyz has 4 terms.
true


 
7.
Shapes that have the same size and shape are said to be similar.
false

 8.
The points where the sides of a polygon meet are called the vertexes.
true

 
9. A heptagon is a seven-sided polygon.
true (hexagon)

 10.
An acute angle has more than 90° but less than 180°.
true

 
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An equation is shown below:
Alinara [238K]
Remove parentheses and combine like terms...

then subtract constants from both sides

isolate variables and constants

use the division property and solve for x



3 0
3 years ago
I only need number 10 plz help!!!!!!!
irga5000 [103]

9514 1404 393

Answer:

  • DE ≈ 9.49, EF ≈ 8.06, FD ≈ 14.87
  • obtuse scalene triangle

Step-by-step explanation:

For finding side lengths, it is convenient to work with the differences of the coordinates.

  DE = E(-1, -3) -D(8, -6) = (-9, 3)

  EF = F(-2, 5) -E(-1, -3) = (-1, 8)

  FD = D(8, -6) -F(-2, 5) = (10, -11)

Then the lengths are ...

  DE = √((-9)² +3²) = √90 = 3√10 ≈ 9.49

  EF = √((-1)² +8²) = √65 ≈ 8.06

  FD = √(10² +(-11)²) = √221 ≈ 14.87

The lengths are all different and the largest angle is obviously more than 90°, so the triangle is an obtuse scalene triangle.

4 0
3 years ago
Consider the following functions. f1(x) = x, f2(x) = x2, f3(x) = 7x − 5x2 g(x) = c1f1(x) + c2f2(x) + c3f3(x) Solve for c1, c2, a
Margaret [11]

Answer:

Therefore the solution is = k{-7,5,1} where k ∈R

Step-by-step explanation:

Given that,

f₁(x) =x

f₂(x)= x²

f₃(x)= 7x - 5x²

Also,

g(x) = c₁f₁(x)+c₂f₂(x)+c₃f₃(x)

Putting the values of f₁(x), f₂(x) and f₃(x).

g(x) = c₁.x+c₂x²+c₃(7x-5x²)

Given condition that g(x)= 0

∴ c₁.x+c₂x²+c₃(7x-5x²)=0

⇒(c₁+7c₃)x +(c₂-5c₃)x² = 0

Comparing the coefficients of x and x²

∴c₁+7c₃=0               and       c₂-5c₃ =0

\Rightarrow c_1 =-7c_3                     \Rightarrow c_2=5c_3

Let c₃= k   [k∈R]  

Then c₁ = -7k   and   c₂=5k

Therefore the solution is = { c₁,c₂,c₃}  

                                           = {-7k, 5k, k}

                                            =k{-7,5,1}

5 0
3 years ago
The diagram below represents a wedge.<br>what is the total surface area of the wedge? ​
slavikrds [6]
Can you take a clearer pic? I can help you
6 0
3 years ago
Which graph or graphs show that a 5 minute phone call costs $4?
timama [110]

The graph should show an increase of $ 0.80 for every minute that the call lasts.

A 5 minute phone call costs $ 4, with which, to determine the information that the graph should show, the following calculation must be performed:

  • 4/5 = X
  • 0.80 = X

Therefore, the graph should show an increase of $ 0.80 for every minute that the call lasts.

Learn more about maths in brainly.com/question/25834039

3 0
3 years ago
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