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Evgesh-ka [11]
2 years ago
10

Which speed below is equivalent to 1/2 miles per hour

Mathematics
1 answer:
Natasha_Volkova [10]2 years ago
3 0

Answer:B

Step-by-step explanation:

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X+y= -9<br> x+2y= -25<br><br> According to the system of equations above, what is the value of y?
Varvara68 [4.7K]
Try this option:
if x+y=-9 is I (one)
and x+2y=-25 is II (two), then
if II-I, then (x+2y)-(x+y)=-25+9 ⇔ y=-16.
6 0
3 years ago
Find the m∡B to the nearest tenth of a degree if cos B = 0.8926 and ∡B is an acute angle
mrs_skeptik [129]

Answer:

26.8°

Step-by-step explanation:

The cosine of an angle is the ratio of the adjacent side of the triangle in which the angle is formed to the hypotenuses side of the triangle. The cosine of the angle gives the ratio of these sides. However, the arc cosine of the ratio gives the angle measured in degrees.

If cos B = 0.8926

then arc cosine 0.8926  which may be expressed as cos-1 0.8926 will give the value of B.

B = cos-1 0.8926

= 26.8°

7 0
3 years ago
How do you verify this trigonometric identity? cos^2 θcot^2 θ = cot^2 θ - cos^2 θ
sattari [20]
<h3>Explanation:</h3>

Replace cos^2(θ) with 1-sin^2(θ), and cot(θ) with cos(θ)/sin(θ).

  cos^2(θ)cot^2(θ) = cot^2(θ) - cos^2(θ)

  (1 -sin^2(θ))cot^2(θ) =  . . . . . replace cos^2 with 1-sin^2

  cot^2(θ) -sin^2(θ)·cos^2(θ)/sin^2(θ) = . . . . . replace cot with cos/sin

  cot^2(θ) -cos^2(θ) = cot^2(θ) -cos^2(θ) . . . as desired

8 0
3 years ago
Classify each function as a power function, root function, polynomial (state its degree), rational function, algebraic function,
Gnoma [55]

x=0-87 hope this helps

5 0
2 years ago
What is the percent of change from 5,000 to 900 ?
nadezda [96]

Answer: 82% decrease

Step-by-step explanation:

Initial number =5000

Final number = 900

Change in numbers = 5000 - 900 = 4100

Since 5000 > 900 ( the change is a decrease)

Thus, the percent change =

(4100/5000) x 100%

= 82%

Thus, the percent of change from 5,000 to 900 is 82% decrease

7 0
3 years ago
Read 2 more answers
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