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zimovet [89]
3 years ago
7

In a 30% off sale, the price of an item is reduced by £27.

Mathematics
1 answer:
Serggg [28]3 years ago
3 0

Answer: the original cost of the item is 90$

Step-by-step explanation:

30% off of the item = 27$

27 dollar is 30% of the item

thus 27 = 0.30X

0.30X = 27

time both side by 10

3X = 270

270/3 = 90

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A college student takes out a $7000 loan from a bank. The bank charges 5,6% interest per year. How much will
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Answer:

$392

Step-by-step explanation:

5.6% of $7000 is 392

4 0
3 years ago
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Oil leaked from a tank at a rate of r(t) liters per hour. the rate decreased as time passed, and values of the rate at two hour
Galina-37 [17]
The given data is
t, h:            0     2     4     6     8   10
r(t), L/h:   8.6  7.9  6.8  6.4  5.7  5.3

The lower and upper estimates for the total amount that leaked may be computed as the Left and Right Riemann sums.

The shape of the graph of r versus will determine which of the two sums yields an upper or lower sum.
The plot of the graph is shown below.

The Left Riemann sum is
Sl = 2*(8.6+7.9+6.8+6.4+5.7) = 70.8 L

The Right Riemann sum is
Sr = 2*(7.9+6.8+6.4+5.7+5.3) = 64.2 L

Answer:
The lower estimate for oil leakage is 64.2 L
The upper estimate for oil leakage is 70.8 L

4 0
3 years ago
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Find the value of Q in the following system so that the solution to the system is {(x,y) : x-3y=4}
Assoli18 [71]

Answer:

Q=2

Step-by-step explanation:

hello :

the solution to the system is

{(x,y) : x-3y=4} means infinty solution

X-3y=4 ....(*)

Qx-6y=8....(**)

multiply  (*) by -2

-2x+6y = -8 (***)

add (*) and (***) : (Q-2)x =0

this ie true for reals x when  Q=2

3 0
3 years ago
Carmine buys 2 plates for $4 each. He also buys 12 bowls. Each bowl costs twice as much as each plate. The store is having a sal
Tasya [4]

Answer

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Step-by step explanation

I used p for plates and b for bowls\

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About 5% of the population has a particular genetic mutation. 900 people are randomly selected.
Gelneren [198K]
I think u need to do 5%*900 which is 5 percent of 900. the answer might be 45 I'm not 100 percebt sure tho
8 0
3 years ago
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