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3 years ago

How do I solve -2(x+5)=4

Mathematics

2 answers:

Charra [1.4K]3 years ago

8 0

Answer:

-7

Step-by-step explanation:

-2(x+5)=4

open the bracket with -2

-2x - 10 = 4

combine the like terms

-2x = 4 + 10

-2x = 14

divide by -2

-2x/-2 = 14/-2

x = -7

Bond [772]3 years ago

5 0

Answer:

-7

Step-by-step explanation:

First simplify both sides.

−2(x+5)=4

(−2)(x)+(−2)(5)=4

−2x+−10=4

−2x−10=4

Then add 10 to both sides.

−2x−10+10=4+10

−2x=14

Finally divide both sides by -2.

−2x/ −2 = 14/ −2 = -7

Answer: -7

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A person takes up 24 inches of space on a stadium bleacher. If one row of bleachers is 150 feet long and there are 20 rows of bl

Feliz [49]

Answer:

1,500 people

Step-by-step explanation:

Remember that

$1\ ft= 12\ in$

Convert ft to in

$150\ ft=150*12=1,800\ in$

Divide the length of a row by the space occupied by one person

$1,800/24=75\ persons$

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3 0

3 years ago

Please help! This is mathematics!

Elanso [62]

Answer:

30, 30, 32, 32, 34, 38, 38, 38. Thats how you first need to set it up then what you do is add them all up which would equal to 272. Then you take 272 dived by how many numbers there are (theres 8 numbers) so you do 272/8 which would be 34! So 34 would be your answer.

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A restaurant sells about 330 sandwiches each day at a price of $6 each $.25 decrease in price. 15 more sandwiches are sold per d

zmey [24]

Answer:

restaurant should charge $(6-0.25) = $5.75per sandwich to maximize daily revenue.

the revenue is $1983.75

Step-by-step explanation:

to calculate current revenue= $6 x 330 = $1980

suppose x as the number of times the price to be dropped by $0.25

then find new price.. i.e

new price= $(6-0.25x)

and, new sell=330 +15x sandwiches

therefore, the new revenue would be= (6-0.25x)(330 +15x)

in order to maximize the current revenue, simplify the above equation and make it complete square using x

(6-0.25x)(330 +15x)

=1980-82.5x +90x -3.75 $x^{2}$

=1980 + 7.5x -3.75 $x^{2}$

=1980-3.75 (-2x+ $x^{2}$ ) ----> taking out common

now, to make a complete square lets add and subtract 1 inside the parentheses

=1980-3.75(-1+1-2x+ $x^{2}$ )

=1980 +3.75 -3.75( $x^{2}$ -2x +1)

=1983.75 -3.75 $(x-1)^{2}$ ---->(1)

as $(x-1)^{2}$ is positive always, minimize the other term in order to maximize the total revenue.

so the minimum possible value of $(x-1)^{2}$ = 0

therefore, x=1

putting x in eq(1) the revenure becomes,

$(1983.75-0)=> $1983.75

therefore, restaurant should charge $(6-0.25) = $5.75per sandwich to maximize daily revenue.

the revenue is $1983.75

3 0

3 years ago

the length of a rectangle is 9 inches more than the width. the perimeter is 54 inches. Find the length and width of the rectangl

Keith_Richards [23]

W is width W+9 is length W+W+9=54 2w=45 45/2 W=22.5 Width is 22.5 length is 31.5

7 0

2 years ago

Which expression is equivalent to √900f^6/100g^4

krek1111 [17]

Answer:

Step-by-step explanation:

c and d cannot be since the answer to sqrt((900f^6)/(100g^4)) is 3f³/g²

and not 30f something.

the best answer I see is correct is a.

6 0

3 years ago