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3 years ago

Solve the equation. -2(x + 3) + 5x = -39

Mathematics

1 answer:

ivanzaharov [21]3 years ago

5 0

Answer:

x= -11

Step-by-step explanation:

-2x-6+5x=-39

3x-6=-39

3x=-39+6

3x=-33

x= -11

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The lines 6y+2=12x+4 and 4y+12=2x-8 are: a) parallel.

KatRina [158]

d) neither parallel or perpendicular

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4 years ago

19. Find the current in a circuit if the power is 500 W (watts) and the resistance is 25 ohms. Round off your answer to two deci

HACTEHA [7]

Answer:

Step-by-step explanation:

The formula that relates current, power and resistance is

$I=\sqrt{\frac{P}{R}}$

Where

I is the current (in amperes)

P is the power (in watts)

R is the resistance (in ohms)

We know P = 500 and R = 25, we plug them into the formula and solve for I:

$I=\sqrt{\frac{P}{R}}\\I=\sqrt{\frac{500}{25}}\\I=\sqrt{20}\\ I=4.47$

Correct answer is 4.47 Amperes, or choice A.

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3 years ago

A radio station is having a promotion in which every 12th caller receives a free concert ticket and every 15th caller receives a

marusya05 [52]

For this, we need to find the lowest common multiple of 12 and 15....

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common multiples of 15 : 15,30,45,60
LCM = 60

the caller that will be the first to win both is the 60th caller

7 0

3 years ago

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What is the simplified form of this expression? (-3x2 + 2x − 4) + (4x2 + 5x + 9)

olga2289 [7]

Answer:

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3 years ago

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How many ways are there for six dogs and four cats to sit in a row in a strawberry field so that no two cats sit next to each ot

pickupchik [31]

Answer: 5,760

Step-by-step explanation:

$\\$ It was given that each dog is distinct from other dogs and each cat is distinct from other cats, Also from the hint given, the First position is for the dogs. $\\$ Let D represent the dogs and C represent the Cat , then we have

$\\$ D C D C D C D C D D or

$\\$ D D C D C D C D C D or

$\\$ D C DD C D C D C D or

$\\$ D C D C D D C D C D or

$\\$ D C D C D C DD C D

$\\$ Each of the arrangements above could be done in

$\\$ 2 x 4! x 4! ( it is constant that D is starting , so I am only left with the arrangement of the remaining 5 D's , out of the remaining 5 D's it is also constant that tow of them will be together and this could be done in 2 ways, so I have 4! left for the D's and 4! also for the C's )

$\\$ = 2 x 24 x 24

$\\$ = 1 , 152

$\\$ The total arrangement = 5 x 1 , 152

$\\$ = 5,7 60 ways

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3 years ago