2 years ago

4(x-2)+2(x+1) Help plz

Mathematics

1 answer:

enyata [817]2 years ago

8 0

Answer:

6(x-1)

Step-by-step explanation:

Open brackets.

4x-8+2x+2

Solve and simplify

6x-6

You can take 6 common

6(x-1)

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2(x−3) = 2x + 15 how many solutions

sammy [17]

Answer:

Step-by-step explanation:

2x-6=2x+15

2x-2x=15+6

0x/0=21/0

x=0

5 0

2 years ago

Find the total area for the regular pyramid.

hram777 [196]

Answer:

Option B

Step-by-step explanation:

Given is the hexagonal pyramid.

We know the radius of the base is same as its side.

Find the base area:

A = 3√3/2a²
A = 3√3/2*6² = 54√3

Given the height and radius, find the side of the lateral triangular faces:

$\sqrt{8^2+6^2} =\sqrt{100} =10$

Each of 6 triangles have sides 10, 10 and 6 units.

Find the area using heron's formula:

s = P/2 = (10*2 + 6)/2 = 13
s - a = s - b = 13 - 10 = 3
s - c = 13 - 6 = 7
$A = \sqrt{s(s-a)(s-b)(s-c)} =\sqrt{13*3*3*7} =3\sqrt{91}$

Total surface area:

$S = 6*3\sqrt{91}+54\sqrt{3} =18\sqrt{91}+54\sqrt{3}$

Correct choice is B

3 0

1 year ago

Linh buys two T-shirts for $12 each, a pair of shoes for $28, and a pair of jeans for $45. She has a coupon for 30 percent off h

sertanlavr [38]

67.9

12 times 2 + 28 + 45 -30%

3 0

2 years ago

Read 3 more answers

(2a-3)(b-a)-3a(3a+b)

ozzi

Answer: -ab - 11a^2 - 3b + 3a

Step-by-step explanation:

i think this is what you're wanting? if not just comment what you need and i'll retry it!

3 0

2 years ago

Dan and Jake have new stamp collecting books. Dan puts 5 stamps in his book every day, and Jake puts 6 stamps in his book every

Ghella [55]

Jake puts 6 stamps in his book every day.

30/6= 5

Jake put stamps in the book for 5 days.

So, Dan puts 5 stamps in the book every day.

5*5= 25

Dan has 25 stamps when Jake has 30.

I hope this helps!
~kaikers

4 0

3 years ago