All categories

1 year ago

Pleas I need help now

Mathematics

1 answer:

Zina [86]1 year ago

8 0

I can't see the picture it is too small

You might be interested in

Which is the best approximation for sqrt 55 A) 7 B) 7 2/5 C) 7 7/15 D) 8

Kitty [74]

The best approximation for sqrt 55 would be: B) 7 2/5

5 0

2 years ago

I've tried to get the answer for this 13 times now (not joking), plzzz help: write a formula that represents the number of peopl

gtnhenbr [62]

Answer:

2820 seats
aₙ = 3n + 9

Step-by-step explanation:

This is an AP with:

The first term a₁ = 12
Common difference d = 3
Number of terms n = 40

Number of the seats:

Sₙ = 1/2*n(a₁ + aₙ) = 1/2n(2a₁ + (n - 1)d)
S₄₀ = 1/2*40(12*2 + 39*3) = 2820 seats

Formula of nth term:

aₙ = a₁ + (n - 1)d
aₙ = 12 + (n - 1)*3 = 12 + 3n - 3 = 3n + 9
aₙ = 3n + 9

6 0

2 years ago

QUICK!! 18x^2+21x-60=0 pls give me the steps as well

Anton [14]

Answer:

$x2 = \frac{4}{3}$

Step-by-step explanation:

$18 {x}^{2} + 21x - 60 = 0$

Divide both sides of the equation by 3

$6 {x}^{2} + 7x - 20 = 0$

Write 7x as a difference

$6 {x}^{2} + 15x - 8x - 20 = 0$

Factor out 3x from the expression

$3x(2x + 5) - 8x - 20 = 0$

Factor out -4 from the expression

$3x(2x + 5) - 4(2x + 5) = 0$

Factor out 2x + 5 from the expression

$(2x + 5)(3x - 4) = 0$

When the product of factors equals 0 , at least one factor is 0

$2x + 5 = 0$

$3x - 4 = 0$

Solve the equation for X

$2x + 5 = 0$

Move constant to R.H.S and change its sign

$2x = 0 - 5$

Calculate the difference

$2x = - 5$

Divide both sides of the equation by 2

$\frac{2x}{2} = \frac{ - 5}{2}$

Calculate

$x 1= - \frac{5}{2}$

Again,

$3x - 4 = 0$

Move constant to RHS and change its sign

$3x = 0 + 4$

Calculate the sum

$3x = 4$

divide both sides of the equation by 3

$\frac{3x}{3} = \frac{4}{3}$

Calculate

$x 2= \frac{4}{3}$

Hope this helps..

Best regards!!

5 0

2 years ago

Read 2 more answers

What is the value of (24-3) -44 -413 1-28

Mashcka [7]

Answer:

-4182

Step-by-step explanation:

(24-3)-44-4131-28 subtract the numbers in ( ) first

21-44-4131-28 calculate the difference ( subtract in order now)

5 0

2 years ago

7x-y=3 for y (please show work)

Anit [1.1K]

Answer:

y= -3+7x

Step-by-step explanation:

7x-y=3 for y

Move variable to the right

-y+3-7x

Change the signs

y= -3+7x

5 0

2 years ago