Which angles are linear pairs? Check all that apply

(2x^2)+7x+5=0, I do not understand the -5/2 part why is it negative please elaborate

mamaluj [8]

Answer:

It is one of the answers of the quadratic expression.

Step-by-step explanation:

There are two answers (because it has exponents, you can have two answers)

-1, -2.5 or -5/2

5 0

3 years ago

What is the measure of angel A?

Rudiy27

Answer:

12.68°

Step-by-step explanation:

We know all three sides (18, 80, 82), but we only need two: 18, and 82. Why? What we do here is find the arcsin of the first leg divided by the hypotenuse.

arcsin(18/82)

18/82 is the same as 9/41, which equals 0.21951 repeating (all 5 digits after the decimal are repeating, by the way).

arcsin(0.21951)

What you see above this statement equals 0.22131 radians.

0.22131 rad

To convert this to degrees, multiply by 57.2957795.

0.22131 * 57.2957795

0.22131 times 57.2957795 is 12.680128961145.

12.680128961145°

The directions say the final answer has to be two decimal places. So this becomes 12.68 (0 is less than 5, so round down).

12.68°

Angle A is 12.68°.

6 0

3 years ago

Which of the relations has a domain of {-5, 0, 5}?

STALIN [3.7K]

B is the correct answer i believe

8 0

3 years ago

Read 2 more answers

Nathan wants to use coordinate geometry to prove that the opposite sides of a rectangle are congruent. He places parallelogram A

Fynjy0 [20]

The formula used to find the length of a line segment is the same formula as the Pythagoras theorem.

We take CD as the hypotenuse of the right-angled triangle and the distance between the x-coordinates and y-coordinates as the length of two short sides.

We can write the formula as
CD = $\sqrt{( x_{1}- x_{0}) ^{2}+ ( y_{1}- y_{0}) ^{2} }$
CD = $\sqrt{(a-0)^{2}+ (b-b)^{2} }$

7 0

4 years ago

Read 2 more answers

What is 129.392 rounded to nearest Ten?

Stels [109]

$\huge\bold\color{purple}{Answer:}$

====================================

Explanation:

To round 129.392 to the nearest tenth consider the hundredths’ value of 129.392, which is 9 and equal or more than 5. Therefore, the tenths value of 129.392 increases by 1 to 4.

129.392 rounded to the nearest tenth = 129.4

====================================

 $\huge\bold\color{purple}{Hope \: it \: helps!}$ 

6 0

3 years ago

Read 2 more answers