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qwelly [4]
4 years ago
7

WILL MARK YOU THE BRAINLIST!!! IF YOU GIVE ME A DUMB ANSWER I WLL REPORT YOU LIKE I DID TO THE OTHER ONE!!!Simplify negative 2 a

nd 1 over 6 – negative 7 and 1 over 3.
Mathematics
1 answer:
frozen [14]4 years ago
7 0

Answer:

Journeysmith5 is wrong. It can be simplified. The answer is 5 1/6

Step-by-step explanation:

We start with the whole numbers, -2 - -7 = +5, because two negatives in the equation will equal to positive. Then from there there's only one of the results with positive 5, 5 1/6. But we can still prove the answer, we work with the fractions. 1/6 - 1/3 equals to around 0.16 continuing. If you divided 100 by 6, you would get 16, meaning that 0.16 is 1/6 of a whole number. Making your answer 5 1/6.

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A 40% discount on $2250<br><br> Please help me it is urgent!!
nevsk [136]

Answer:

1350

Step-by-step explanation:

multiply 40% and 2250

equals 900

subtract 900 from 2250

3 0
3 years ago
Read 2 more answers
If a room temperature roast cools from 68°F to 25°F in 5 hours at freezer temperature of 20°F,
Deffense [45]

Answer:

9 hours

Step-by-step explanation:

According to Newton's laws of cooling

dT/dt = -k(T - A)

Let U = T - A

dU/dT = 1

dU = dT

dt/dt = -kU

dT = -kU(dt)

dU/U = -kdt

On integration

ln(U) = -kt + C

U = Ce^-kt

T - A = Ce^-kt

T(0) = 68

T(5) = 25

68 - 20 = Ce^-k(0)

C = 48

and

25 -20 = 48e^-k(5)

5 = 48e^-5k

e^-5k = 5/48

-5k = ln (5/48)

k = - ln(5/48) / 5

k = - 0.4524

T - 20 = 48e^-0.4524t

When T = 21

21 -20 = 48e^-0.4524t

1 = 48e^-0..4524t

e^-0.4524t = 1/48

-0.4524t = ln (1/48)

t = - ln(1/48) / 0.4524

t = 8.5570

t= 9 hours ( to the nearest hour)

5 0
3 years ago
Find the Area of the parallelogram.<br> 12 in.<br> 15 in.<br> 18 in
kolbaska11 [484]
Answer i believe is 270
5 0
3 years ago
Pirate Jack has an equal number of gold and silver coins. If Pirate Jack splits all of his coins into 7 equal piles for his parr
Tcecarenko [31]

Answer:

The least possible number of coins the Pirate has = 81

Step-by-step explanation:

Given:

Pirate Jack has equal number of gold and silver coins.

When the pirate splits the coins into 7 equal piles he has 4 coins left.

When the pirate splits the coins into 11 equal piles he has 4 coins left.

Every pile has at least 1 coin.

To find the least possible number of coins Pirate Jack has.

Solution:

In order to find the least possible number of coins pirate Jack has, we must find the least common multiple of the number of piles the coins are split into.

So, the least common multiple of 7 and 11 can be found by listing the multiples.

7= 7,14,21,28...............,77

11=11,22,33,44,55,66,77

So, we find the least common multiple of 7 and 11 is 77.

Number of coins left = 4

Total number of coins the pirate must have = 77+4 =81

We can check the answer by dividing 81 by 7 and 11. I both cases we get remainder = 4.

So, the least possible number of coins the pirate has = 81

6 0
4 years ago
Solve by factoring<br><br>2n^2+12n+18
Gelneren [198K]

Answer:

Step-by-step explanation:

d/dn(2 n^2 + 12 n + 18) = 4 (n + 3)

Indefinite integral:

integral(18 + 12 n + 2 n^2) dn = (2 n^3)/3 + 6 n^2 + 18 n + constant

Global minimum:

min{2 n^2 + 12 n + 18} = 0 at n = -3

8 0
3 years ago
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