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3 years ago

pls pls pls, I beg you to answer this question only if you know the correct answer please please please I beg you

Mathematics

1 answer:

UkoKoshka [18]3 years ago

7 0

Answer:

the first question id k

20. d

24. 105, 96, -20, -73, -560

last question i also dont know

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Find the square. (3m + 3)2

olya-2409 [2.1K]

Answer:

9m^2 + 18m + 9

Step-by-step explanation:

(3m + 3)2

Square ;

(a + b)^2 = a2 + b2 + 2ab

(3m + 3)2

= (3m)^2 + (3)^2 + 2 (3m)(3)

= 9m^2 + 9 + 18m

= 9m^2 + 18m + 9

5 0

3 years ago

Factorising quadratics <br><br> All questions please to be completed. I’m stuck.

Alex777 [14]

Answer:

1. (x +1)(x - 1)

2. (x+5)(x-5)

3. (x+12)(x-12)

4. (x+14)(x-14)

5. (x+5)(x-7)

Step-by-step explanation:

The first 4 expressions can be factored with the difference of squares type of factoring.

For #5, the odd one out is (x+5)(x-7) because it isn't a factor of any of the standard form equations, while the others are

5 0

4 years ago

An English class attended a performance at the theater. The class took 25 students and 3 adults. Each student ticket, s, cost $3

castortr0y [4]

Total cost = student cost + adult cost
t = 25s + 3(s+3)
t=28s+9

8 0

4 years ago

a cone with a radius of 3” has a total area of 24pie square inches. Find the volume of the cone. 12pie, 24 pie or 15 pie

Ratling [72]

Answer:

$12\pi (inches)^{2}$

Step-by-step explanation:

Given:

radius of cone = 3 inch

Total area of cone = $24\pi (inch)^{2}$

Find the volume of the cone?

We know the area of cone = $\pi r(r+s)$ -------(1)

Where r = radius

Ans s = side of the cone

Put the area value in equation 1

$24\pi=\pi r(r+s)$ -------(1)

$\frac{24\pi }{\pi r} =r+s$

$\frac{24}{ r}-r =s$

Put r value in above equation.

$s =\frac{24}{ 3}-3$

$s=8-3$

$s=5$

The side s = 5 inches

We know the side of the cone formula

$s^{2}=r^{2}+ h^{2}$

$h^{2}=s^{2}- r^{2}$

Put r and s value in above equation.

$h^{2}=5^{2}- 3^{2}$

$r^{2} = 25-9$

$r^{2} = 16$

$r = 4$

The volume of cone is

$V = \frac{1}{3} \pi r^{2} h$

Put r and h value in above equation.

$V = \frac{1}{3} \pi (3)^{2}\times 4$

$V = 12\pi (inches)^{2}$

The Volume of the cone is $12\pi (inches)^{2}$

7 0

3 years ago

Pls help me !!!!!!!!!!!!!!!!!!!!!!!!

Vikentia [17]

Answer:

9.89 m

Step-by-step explanation:

AC is the hypotenuse (H)

x is the opposite (O)

O and H are in sine

sin=O/H

H=O/sin

H=7.9/sin(53)

=9.89187169943418

3 SF

9.89 m

8 0

3 years ago

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