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2 years ago

Help please with this question

Mathematics

1 answer:

Svetllana [295]2 years ago

8 0

Step-by-step explanation:

0 = x² - 6x - 27

a = 1, b = -6, c = -27 Factor using AC method.

ac = (1)(-27) = -27

Factors of -27 that add up to -6 are -9 and 3.

Therefore:

0 = (x - 9) (x + 3)

x = -3, x = 9

The x-intercepts are (-3, 0) and (9, 0).

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What is the ‘r’ value of the following sequence: 6, 18, 54, 162…?

goblinko [34]

R = 3
6x3=18
18x3=54
54x3=162 ...

5 0

3 years ago

A baker made 60 muffins for a cafe. By noon, 45% of muffins were sold. How many muffins were sold by noon?

Genrish500 [490]

27

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3 years ago

What is the frequency of the sinusoidal graph ?

disa [49]

Answer:

The frequency of the given sinusoidal graph is 4.

Step-by-step explanation:

The frequency of a sinusoidal graph is the number of cycles it completes in the interval 0 to 2π radians.

From the given sinusoidal graph it is noticed that the the graph complete its one cycle in the interval 0 to $\frac{\pi}{2}$ .

If the complete its one cycle in $\frac{\pi}{2}$ , then the number of cycles completed by the graph in the inteval 0 to 2π is

$\frac{\pi}{2}\times frequency=2\pi$

$frequency=2\pi \times \frac{2}{\pi}$

$frequency=4$

Therefore the frequency of the given sinusoidal graph is 4.

7 0

3 years ago

Y = -4/3x − 1<br> y = 1/3x + 4

Tom [10]

Answer:

x = -3, y =3

Step-by-step explanation:

y = -4/3x - 1

y = 1/3x + 4 -------> 4y = 4/3x + 16

Adding the first equation and the new second equation together:

5y = 15 ------> y = 3

Plug y = 3 into one of the original equations:

3 = 1/3x + 4

-1 = 1/3x

x = -3

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2 years ago

4x-10=2 <br> Solve and find the justification <br> Help!! Hurry!!

astra-53 [7]

4x-10=2

add 10 to each side (addition property of equality)

4x-10+10=2+10

simplify

4x = 12

divide by 4 (division property of equality)

4x/4 = 12/4

simplify

x=3

4 0

3 years ago

Read 2 more answers