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Alisiya [41]
3 years ago
9

-3(-4n + 30) = -30 need help​

Mathematics
1 answer:
DIA [1.3K]3 years ago
6 0

First we will do -3 times everything in the parenthesis.

-3 times -4n = 12n

-3 times 30 = -90

SO,

12n - 90 = -30

       +90    +90

12n = 60

divide 12 on both sides;

n = 5

This is your answer,

IF THIS HELPED, PLS GIVE ME BRAINLIEST!

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The temperature at 5 pm is 20F the temperature at 10pm is -5F. The temperature fell how many degrees
Julli [10]

To find how much the temperature fell we must find the difference of both numbers and to do this we subtract them;

20 - (-5) = 25 degrees

7 0
3 years ago
A liquid form of penicillin manufactured by a pharmaceutical firm is sold in bulk at a price of
inna [77]
The revenue is given by the unit price * number of units.
Profit = Revenue - Cost = 200x - 500,000 - 80x - 0.003x^2 = 120x - 500,000 - 0.003x^2
For profit to be maximum dP/dx = 0
120 - 0.006x = 0
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Therefore, to maximize profit, the firm should produce 20,000 penicillin.
7 0
3 years ago
Pls help me give u a brainlest
Snezhnost [94]

Answer:

2,139

Step-by-step explanation:

Volume= length X Width X Height

L= 15.5 cm

W= 9.2 cm

H= 15

L X W X H= ?

15.5 X 9.2 X 15=?

2,139

you are suppose to multiply all of them 2 get ur answer

3 0
3 years ago
An electronics store is selling a pair of headphones for $82.00. If there is a 7% sales tax, what is the actual cost of the head
stepladder [879]
82 x .07 = 5.74
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5 0
3 years ago
Read 2 more answers
Mikayla planted a garden in her backyard in the shape of a right triangle. The two legs of the triangle are 12 feet each. Fencin
Dennis_Churaev [7]

Answer:

$204.85

Step-by-step explanation:

Let the two legs be the adjacent and the opposite of the right triangle. To get the third side (the hypotenuse), we will use the pythagoras theorem;

hyp^2 = opp^2 + adj^2\\hyp^2 =12^2+12^2\\hyp^2 = 144+144\\hyp^2 = 288\\hyp = \sqrt{288}\\hyp =  16.97 feet

Perimeter of the garden will be the sum of all the three sides.

Perimeter of the garden = 12 + 12 + 16.97

Perimeter of the garden = 40.97 feet

Since 1 foot = $5

40.97 feet = x

Cross multiply

1*x = 5*40.97

x = 204.85

Hence it will cost $204.85 to fence the entire perimeter of the garden

7 0
3 years ago
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