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umka21 [38]
2 years ago
12

Help me please I'm terrible at math

Mathematics
1 answer:
mr_godi [17]2 years ago
3 0

Answer:

Step-by-step explanation:

ok first you make a equation which is 2x+1+5x-14

then you combine like terms so 2x+5x= 7x and -14+1=-13

so now the equation is 7x-13

but i need to know the full length of AC to finish it

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Multiply -3x(4x - 5)
Burka [1]
Hopes this helps if right please mark as brainlist:

Answer: -12x^2 + 15x
5 0
2 years ago
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Solve x2 + 10x = 24 by completing the square. Which is the solution set of the equation? {–12, 2} {–2, 12}
guajiro [1.7K]

Answer: I could be wrong so don't get your hopes up but I believe the solution set would be {-2,12}

Step-by-step explanation:

3 0
3 years ago
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A red car is driving along the road in the direction of the police car and is 130 feet up the road from the location of the poli
pishuonlain [190]

Complete question:

A police car is located 50 feet to the side of a straight road. A red car is driving along the road in the direction of the police car and is 130 feet up the road from the location of the police car. The police radar reads that the distance between the police car and the red car is decreasing at a rate of 75 feet per second. How fast is the red car actually traveling along the road.

Answer:

The red car is traveling along the road at 80.356 ft/s

Step-by-step explanation:

Given

Police car is 50 feet side off the road

Red car is 130 feet up the road

Distance between them is decreasing at the rate of 75 feet per sec

Let x be how far the police is off the road.

Let y be how far the red car is up the road.  

Let h be the distance between the police and the red car.

This forms a right triangle so we can use the Pythagorean theorem, to solve for h

h² = x² + y²

h² = 50² + 130²

h² = 19400

h = √19400

h = 139.284 ft

Again;

Let dx/dt be how fast the police is traveling toward the road.

Let dy/dt  be how fast the red car is traveling along the road.

Let dh/dt be how fast the distance between the police and the car is decreasing.

Recall that, h² = x² + y² (now differentiate with respect to time, t)

2h(dh/dt) = 2x(dx/dt) + 2y(dy/dt)

divide through by 2

h(dh/dt) = x(dx/dt) + y(dy/dt)

since the police car is not, dx/dt = 0

and dy/dt is the how fast is the red car actually traveling along the road

139.284(75) = 50(0) + 130(dy/dt)

10446.3 = 0 + 130(dy/dt)

dy/dt = 10446.3 / 130

dy/dt = 80.356 ft/s

Therefore, the red car is traveling along the road at 80.356 ft/s

6 0
3 years ago
(pic inside) What is the approximate value of the function at x = 1?
Kay [80]

Answer: -2

Step-by-step explanation:

When x = 1, y = -2.

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6 0
3 years ago
I need to know this answer
Free_Kalibri [48]

Answer:

r = 7

Step-by-step explanation:

Given

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- 3r = - 21 ( divide both sides by - 3 )

r = 7

5 0
3 years ago
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