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sashaice [31]
3 years ago
11

Two-fifths of a number is decreased by three. Find the value of the expression if the number is twenty-five.

Mathematics
2 answers:
Sindrei [870]3 years ago
8 0
Let's take the number as x.

two-fifths of a number = 2x / 5
decreased by 3 = (2x/5) - 3

(2x/5) - 3
(2*25/5) - 3
(2*5) - 3
10 - 3
7 
harkovskaia [24]3 years ago
6 0

Answer:

7

Step-by-step explanation:

Let x be the number .

Two- fifth of a number=\frac{2}{5}x

Now, it is decreased by 3=\frac{2}{5}x-3

We have to find the expression if the number is 25.

To find the value of expression we will substitute x= 25 in the expression.

The expression is given by

\frac{2}{5}x-3

Substitute x=25

Then, we get

\frac{2}{5}\times 25-3=10-3=7

Hence, the value of expression if the number is 25=7

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Find the surface area of the cylinder. Round your answer to the nearest hundredth.
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Answer:

  C.  795.45 in^2

Step-by-step explanation:

The formula for the surface area of a cylinder is ...

  SA = 2πr^2 +2πrh = 2πr(r +h)

For r=6 and h=15.1, the surface area is ...

  SA = 2π(6)(6 +15.1) = π(12)(21.1) = 253.2π

  SA ≈ 795.45 . . . . square inches

4 0
3 years ago
The histogram below shows the estimated monthly salaries of company employees with different years of experience.
jeka94

Answer: The scale on the y-axis overemphasizes the difference in salaries between different experience levels.

Step-by-step explanation:

4 0
2 years ago
Find the values for a and b that would make the equality true.
zepelin [54]

Answer:

a = - 4, b = 5

Step-by-step explanation:

Expand the left side, then compare the coefficients of like terms.

- 3(2x² + ax + b)

= - 6x² - 3ax - 3b, compare to - 6x² + 12x - 15

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8 0
3 years ago
Name the property that the following statement illustrates. 81plus4equals4plus81 Choose the correct property below. A. Commutati
sladkih [1.3K]

Answer:

I would say c) is your answer beacause Commutative definition is changing the order of a pair of numbers.

Step-by-step explanation:


5 0
3 years ago
PLEASE HELP.
Arte-miy333 [17]
We know that
the law of cosines establish 
b²=a²+c²-2*a*c*cos B
in this problem
a=4 units
c=5 units
B=60°
so
b²=a²+c²-2*a*c*cos B
b²=4²+5²-2*4*5*cos 60°
b²=16+25-40*(1/2)
b²=16+25-20
b=√[16+25-20]

the answer is
b=√[16+25-20]

8 0
3 years ago
Read 2 more answers
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