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katen-ka-za [31]
3 years ago
15

Help please with this question

Mathematics
1 answer:
Svetllana [295]3 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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8. What is the point-slope form of a line passing through the point (-2.5) with the same slope as
torisob [31]

Answer:

y= -3x-1

Get the slope from the equation by getting y by its self then dividing everything by -1, which gives you y=-3x-12. You the -3 as your slope when doing the point-slope form.

3 0
3 years ago
The sum of 5 consecutive odd numbers is 145
xeze [42]

The sum of 5 consecutive odd integers is 145. These are the other 4 consecutive odd numbers. Now if we add all of these up we will get this : 25 + 27 + 29 + 31 + 33 = 145.

Hope I helped! ☺☼

8 0
3 years ago
Find the volume of the cone
Mrrafil [7]

Answer:

Step-by-step explanation:

slant height l = 14cm

r = 6 cm

Use Pythagorean theorem.

h² + 6² = 14²

h² + 36 = 196

h² = 196 - 36

h² = 160

h = √160

h = 12.65 cm

Volume=\frac{1}{3}\pi r^{2}h\\\\=\frac{1}{3}*3.14*6*6*12.64\\\\

= 476.61 cubic cm

7 0
3 years ago
Suppose the equation E = $500 + $7x represents a person's earnings (+) for
Sholpan [36]

Answer:

Option D : $780 is the correct answer.

Step-by-step explanation:

Given expression is:

E = $500 + $7x

We will put all the values of given options to check.

A. Putting 430 in given expression

430 = 500 + 7x

430 - 500 = 7x

-70 = 7x

As the number of items sold cannot be negative, therefore, this option is not correct.

B. 530 = 500 + 7x

530 - 500 = 7x

30 = 7x

x = 4.3 (By dividing both sides by 7)

Which is not a whole number.

C. 680 = 500 + 7x

680 - 500 = 7x

7x = 180

x = 25.71

Which is also not a whole number.

D. 780 = 500 + 7x

780 - 500 = 7x

280 = 7x

7x = 280

x = 40

Which is a whole number.

Hence,

Option D : $780 is the correct answer.

4 0
3 years ago
the ratio of the sides of two squares is 6:16 the area of the smaller square is 45cm2 what’s the area of the larger square
Rama09 [41]
Ans=120cm^2
45/6*16
………….
6 0
3 years ago
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