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3 years ago

Using the cross multiplication method, which of the following is the solution to 11/(2x+5) = 12/2x?

Mathematics

1 answer:

garri49 [273]3 years ago

7 0

Answer:

x = -30 so it's D

Step-by-step explanation:

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An airplane travels 800 miles with the wind in the same of time it takes to travel 650 miles against the wind. What is the speed

SOVA2 [1]

Answer:

90 mph

Step-by-step explanation:

Against wind DATA:

distance = 600 miles ; time = 5 hrs. ; rate = 600/5 = 120 mph

With wind DATA:

distance = 600 miles ; time = 2 hrs ; rate = 600/2 = 300 mph

Equations:

p + w = 300

p - w = 120

2p = 420

p = 210 mph (speed of the plane in still air)

Since p+w = 300, w = 300-210 = 90 mph (speed of the wind)

3 0

3 years ago

Find mZ3 if mZ5 = 145º and mZ4 = 45°

trapecia [35]

9514 1404 393

Answer:

C. 100°

Step-by-step explanation:

The exterior angle is equal to the sum of the remote interior angles.

∠5 = ∠3 +∠4

145° = ∠3 +45° . . . . fill in the given values

100° = ∠3 . . . . . . subtract 45° from both sides

7 0

3 years ago

Prove the identity.<br> cosh(−x) = cosh(x)

mars1129 [50]

Answer C

Step-by-step explanation: lol idk

6 0

3 years ago

A figure with length and width, but no depth, is called _ _ _-dimensional.

k0ka [10]

Answer: The term is called Two dimensional.

5 0

3 years ago

Which equation in slope-intercept form represents a line that passes through the point (6,−1) and is perpendicular to the line y

damaskus [11]

For this case we have that by definition, the equation of a line of the slope-intersection form is given by:

$y = mx + b$

Where:

m: It is the slope of the line

b: It is the cut point with the y axis

By definition, if two lines are perpendicular then the product of their slopes is -1.

If we have: $y = 2x-7$

$m_ {1} = 2\\2 * m 2 = - 1\\m_ {2} = - \frac {1} {2}$

Thus, the equation is of the form:

$y = - \frac {1} {2} x + b$

We substitute the point:

$-1 = - \frac {1} {2} (6) + b\\-1 = - \frac {1} {2} (6) + b\\-1 = -3 + b\\-1 + 3 = b\\b = 2$

Finally, the equation is:

$y = - \frac {1} {2} x + 2$

Answer:

$y = - \frac {1} {2} x + 2$

6 0

3 years ago