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kolbaska11 [484]
3 years ago
8

Which of the following expressions represents the least common multiple of 15, 18, and 25?

Mathematics
1 answer:
Virty [35]3 years ago
7 0

Answer:

(2)(3^2)(5^2)

Step-by-step explanation:

we know that

The <u>Least Common Multiple</u> (LCM) of a group of numbers is the smallest number that is a multiple of all the numbers.

we have

15,18 and 25

Decompose the numbers in prime factors

15=(3)(5)

18=(2)(3^2)

25=(5^2)

Multiply common and uncommon numbers with their greatest exponent

so

The LCM is equal to

LCM=(2)(3^2)(5^2)

LCM=450

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STatiana [176]

Rationalize the numerator:

\dfrac{\sqrt{x+4}-2}x\cdot\dfrac{\sqrt{x+4}+2}{\sqrt{x+4}+2}=\dfrac{(\sqrt{x+4})^2-2^2}{x(\sqrt{x+4}+2)}=\dfrac x{x(\sqrt{x+4}+2)}=\dfrac1{\sqrt{x+4}+2}

This is continuous at x=0, so we can evaluate the limit directly by substitution:

\displaystyle\lim_{x\to0}\frac{\sqrt{x+4}-2}x=\lim_{x\to0}\frac1{\sqrt{x+4}+2}=\frac1{\sqrt4+2}=\frac14

5 0
3 years ago
Line HF is tangent to circle D at point E. SEgment DE is the radius of circle D, what is true about DEF?
ivolga24 [154]

When we draw a circle with the centre at D and have a tangent HF to the circle D at point E, the angle DEF will be a right angle.

In other words angle DEF = 90 degrees

Since HF, the tangent, is a straight line, the other angle DEH should also be = 90 degrees because the straight line has an angle of 180 degrees

Therefore angle DEF = angle DEH = 90 degrees

Therefore, angle DEF is congruent to angle DEH (Option A)


3 0
2 years ago
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Need help little confuse
lara31 [8.8K]
3(2-y) + y = 4.50
6 - 3y + y = 4.50
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answer
x = 1.25 and y = 0.75
cost of one lemonade = 75 cents
8 0
3 years ago
ABCD is a parallelogram. Solve for BC.<br> B<br> X + 8<br> с<br> A<br> 2x +1 D<br> BC =
Arturiano [62]

Step-by-step explanation:

BC = AD (opposite sides in parallelogram is equal)

x + 8 = 2x + 1

8 - 1 = 2x - x

7 = x

x = 7

BC = x + 8 = 7 + 8 = 15

7 0
2 years ago
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Shtirlitz [24]
<h3>Answer: Choice C)  $1125</h3>

==============================================================

Explanation:

We'll add up the values in the bottom row of the table.

A value like +150 is the same as simply saying 150

The negatives stick around.

Adding up the values in that row gets us

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---------

In other words, the initial investment (call it x) has increased by 375 dollars over the 6 month period.

We can then say:

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6 0
3 years ago
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