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Bezzdna [24]
3 years ago
5

Expand and simplify (5x+2)(2x-3)

Mathematics
2 answers:
Inessa [10]3 years ago
6 0

Answer:

(5x+2)(2x-3)=5x(2x-3)+2(2x-3)=5x*2x-5x*3+2*2x-2*3=10x^2-15x+4x-6=

10x^2-11x-6

Step-by-step explanation:

Snowcat [4.5K]3 years ago
3 0

Answer:

10x^2 - 11x - 6

Step-by-step explanation:

(5x+2)(2x-3)

= 10x^2 - 15x + 4x - 6

= 10x^2 - 11x - 6

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If the maximum acceleration that is tolerable for passengers in a subway train is 1.74 m/s2 and subway stations are located 930
Free_Kalibri [48]
Given that the subway stations are 930 m apart, the train have to be accerelated for half the distance and then decerelated for the rest of the distance.

Recall that the distance travelled by an object with an initial velocity, u, for a period of time, t, at an accereration, a, is given by
s=ut+ \frac{1}{2} at^2

But, we assume that the train accelerates from rest, thus
s=\frac{1}{2} at^2 \\  \\ \Rightarrow465=\frac{1}{2}(1.74)t^2 \\  \\ \Rightarrow t^2=534.48 \\  \\  \Rightarrow t=\sqrt{534.48}=23.12

The maximum speed is attained at half the center of the distance between subway stations (i.e. at distance = 465 m).

Thus, maximum speed = distance / time = 465 / 23.12 = 20.11 m/s.
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3 years ago
А square tile has a width of foot. How many tiles will fit end-to-end along a<br> 4-foot wall?
irina1246 [14]

Answer:

4 tiles

Step-by-step explanation:

4/1 = 4

5 0
2 years ago
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An object is moving in a straight line. It initially travelz at a speed on 9 meters per second, and speeds up at a constant rate
Crank

Answer:13 meters per second

Step-by-step explanation:

5 0
3 years ago
Solve the system of equations<br> 3x – 2y + 4z = -14<br> -4x + y + 4z = -16<br> -3x - y - 4z = 2
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Step-by-step explanation:

8 0
3 years ago
A. 115<br> B. 167<br> C. 126<br> D. 96
geniusboy [140]

Answer:

126

Step-by-step explanation:

Let x be the missing length

The triangles are similar:

● UE/140 = 45/x

From the graph we deduce that:

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Replace UE by its value

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Switch x and 50

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45/50 is 9/10 wich is 0.9

● x/140 = 0.9

Multiply 0.9 by 140

● x = 140 × 0.9

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5 0
3 years ago
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