2 years ago

Solve the following for j: 2(k+j) = 4m

Mathematics

1 answer:

maxonik [38]2 years ago

6 0

Answer: j=−k+2m

Step-by-step explanation: 2(k+j)=4m

2j+2k+−2k=4m+−2k

−2k+4m

j=−k+2m

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Jerome has 1/4 of the group's video games at his house. Mario has 2/5 of the video games at his house. what fraction of the grou

serious [3.7K]

Answer: 13/20 of the video games at both of their houses.

Step-by-step explanation: The equation is 1/4 + 2/5. You need to find their common denominator which is 20, so the equation is now 5/20 + 8/20 = 13/20, which can't be simplified.

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3 years ago

Solve each quadratic equation by factoring and using the zero product property.<br><br> n^2 - 49 = 0

Karo-lina-s [1.5K]

Answer:

x = 7 x = -7

Step-by-step explanation:

n^2 - 49 = 0

+49 +49

n^2 = 49

$\sqrt{n} = \sqrt{49} \\\\n = +/- 7\\$

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2 years ago

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The Environmental Protection Agency must visit nine factories for complaints of air pollution. In how many ways can a representa

kirill115 [55]

Answer:

The number of ways is $\left 9}\atop } \right. P _5 = 15120$

Step-by-step explanation:

From the question we are told that

The number of factories visited is $n = 9$

The number of factories to be visited by a representative r = 5

The number of way to visit the 5 factories is mathematically represented as

$\left 9}\atop } \right. P _5 = \frac{9!}{(9-5)!}$

Where P represents permutation

=> $\left 9}\atop } \right. P _5 = \frac{9 \ !}{4\ !}$

=> $\left 9}\atop } \right. P _5 = \frac{9 *8*7 * 6 * 5 * 4!}{4\ !}$

=> $\left 9}\atop } \right. P _5 = 15120$

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3 years ago

(11a - 2b +7c) - (3a - 9b + 5c)

ivolga24 [154]

<h3>Answer: 8a + 7b + 2c</h3>

Work Shown:

(11a - 2b + 7c) - (3a - 9b + 5c)

11a - 2b + 7c - 3a + 9b - 5c ... see note below

(11a-3a) + (-2b+9b) + (7c-5c)

8a + 7b + 2c

note: don't forget to distribute the negative through to every term inside the parenthesis

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3 years ago

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Find value of the expressions a =4, b=2 and c =3 then 2(a+3b)-(b+c)

Blizzard [7]

Answer:

2(a+3b)-(b+c)=

2(4+3(2))-(2+3)=

2(4+6)-(5)=

2(10)-5=

20-5=

Step-by-step explanation:

8 0

2 years ago