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Hoochie [10]
3 years ago
9

There's a string of red and blue lights strung around a window the red lights blink every three seconds and the blue lights blin

k every five seconds how many times will the blank at the same time in one minute
Mathematics
2 answers:
VashaNatasha [74]3 years ago
4 0
4 times 3x5 =15
60\15=4
Answer= 4
alekssr [168]3 years ago
3 0

Answer:

In one minute, they will blink at the same minute 4 times.

Step-by-step explanation:

The amount it takes for them to blink together is the least common multiple between the time it takes for each of them to blink together.

It takes 3 seconds for the red light to blink and 5 seconds for the blue light to blink. The lcm between 3 and 5 is 15. This means that they blink together each 15 seconds.

A minute has 60 seconds. So in a minute, they are going to blink together 60/15 = 4 times.

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Express the function f(x) =3x^2-6x-18 in the form a(x + h)^2=k, where a, h and k are constants.Hence state the :
ololo11 [35]

Answer:

The minimum value of f(x) is -21 and it occurs at x = 1

Step-by-step explanation:

f(x) =3x^2-6x-18

Factor out the greatest common factor out of the first two terms

f(x) =3(x^2-2x)-18

Complete the square

-2x/2 =-1  (-1)^2 = 1

Add 1  (But remember the 3 out front so we are really adding 3  so we need to subtract 3 to remain balanced)

f(x) = 3(x^2 -2x+1) -3 -18

f(x) = 3(x-1)^2 -21

This is vertex form

f(x) = a(x-h)^2 +k  where (h,k) is the vertex and a is a constant

The vertex is (1,-21)  

Since a > 0 this opens upward and the vertex is a minimum

The minimum value of f(x) is -21 and it occurs at x = 1

6 0
2 years ago
Can an expert help with this
SVEN [57.7K]

The formula of an area of a circle:

A_O=\pi r^2

We have

r = 1.8 m

π ≈ 3.14

Substitute:

A_O=\pi\cdot1.8^2=3.24\pi\ m^2\approx3.24\cdot3.14=10.1736\ m^2\approx10.17\ m^2

7 0
2 years ago
BRAINLIEST ASAP! PLEASE ANSWER!!!!!
kenny6666 [7]
Similarities: They both are polynomials of degree 2, both of their graphs is a parabola, both have either 2 or 0 real solutions, they are both continuous functions over R 

<span>(DOS= difference of two squares, PST=perfect square trinomial </span>

<span>Differences: PST has three terms, whereas the difference of squares has 2. PST's factors are both the same, whereas DOS's elements are conjugates of each other. DOS can always be factored into two distinct polynomials with rational coefficients, whereas PST has two same polynomial factors.</span>
8 0
2 years ago
Your grandfather gave you $1.65 with
Lelu [443]

Answer:

$1.98

Step-by-step explanation:

1.65/5=0.33

1.65+0.33=1.98

check: 1.98/6 =0.33

0.33x5=1.65

5 0
3 years ago
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The groundskeeper of Estofer Park needs to mow 14,623 sq. ft. of grass, He can mow 13 sq. ft. of grass in one minute. How many m
77julia77 [94]
190,099 is your answer for the question
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3 years ago
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