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AleksandrR [38]
3 years ago
6

Can anyone please help me on this question

Mathematics
2 answers:
ELEN [110]3 years ago
6 0
D

distribute negative sign first

5x +3 +-1(x+2
5x+3+-1x+(-1)(2)
5x +3-x+-2

now combine like terms
( 5x + -x) + (3 + -2)

4x+1
Setler79 [48]3 years ago
3 0

Answer:

d

Step-by-step explanation:

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

distribute (5x + 3) by 1 and (x - 2) by - 1

= 5x + 3 - x - 2 ← collect like terms

= 4x +1 → d


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Step-by-step explanation:

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when a stone falls freely, the time taken to hit the ground varies as the square root of the distance fallen. If it takes four s
Eva8 [605]

Answer:

The stone would take approximately 10.107 seconds to fall 500 meters.

Step-by-step explanation:

According to the statement of the problem, the following relationship of direct proportionality is built:

t \propto y^{1/2}

t = k\cdot t^{1/2}

Where:

t - Time spent by the stone, measured in seconds.

y - Height change experimented by the stone, measured in meters.

k - Proportionality constant, measured in \frac{s}{m^{1/2}}.

First, the proportionality constant is determined by clearing the respective variable and replacing all known variables:

k = \frac{t}{y^{1/2}}

If t = 4\,s and y=78.4\,m, then:

k = \frac{4\,s}{(78.4\,m)^{1/2}}

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Then, the expression is t = 0.452\cdot y^{1/2}. Finally, if y = 500\,m, then the time is:

t = 0.452\cdot (500\,m)^{1/2}

t \approx 10.107\,s

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4 0
3 years ago
1. (07.01 LC)
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