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frez [133]
3 years ago
11

(2a+b)² -(3a+4b)(2a+7b)​

Mathematics
1 answer:
BabaBlast [244]3 years ago
7 0
-2a^2 - 25ab - 27b^2

hope this helps :)
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Person A can paint the neighbor's house 5 times as fast as Person B. The year A and B worked together, it
LenKa [72]

Answer:

Person A paints the house in 12 days.

person B paints the house in 60 days.

Step-by-step explanation:

The together rate is the sum of each separate rate.

Person A can paint the neighbor's house 5 times as fast as Person B.

This means that the rate of person A is 1/x, and the rate of person B is 1/5x.

The year A and B worked together, it took them 10 days.

This means that:

\frac{1}{x} + \frac{1}{5x} = \frac{1}{10}

Multiplying everything by 10x

10 + 2 = x

x = 12

This means that:

Person A paints the house in 12 days.

person B paints the house in 60 days.

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3 years ago
Can the sides of a triangle have lengths 1, 4, and 7?
Nadusha1986 [10]

Answer:

No

Step-by-step explanation:

No because the measure of two sides are always greater than the third side

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lys-0071 [83]
25/4 that is the answer
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A bus is traveling at 50 mph. If the rate of speed increases 3 mph each hour, how long will it be before the bus is traveling at
arsen [322]

Answer:

It will take 10 hours.

Step-by-step explanation:

By using the formula of motion,

v = u + at

Here, v = Final speed of an object

u = initial speed

a = Acceleration by which the speed is increasing

t = Duration or time

Now substitute the values given in the question,

80 = 50 + 3t

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t = 10 hours

Therefore, after 10 hours speed of the bus will be 80 mph.  

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3 years ago
0.13391963118/17(3.78)
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Answer:

Simplify the expression.

0.02977742

Step-by-step explanation:

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