-2(n+3)=13 solve for n

Answers

Answer 1

Answer: Answer:

1. Simplify:

-2(n + 3) = 13
-2n - 6 = 13

2. Change „-6” side to right (to get answer), without forgetting to change the sign:

-2n - 6 = 13
-2n = 13 + 6
-2n = 19

3. Simplify (The „|” means operation done at both sides of equation):

-2n = 19 |:(-2)
n = -9.5

Proof:
-2(-9.5 + 3) = -2 * (-6.5) = 13

Hope this helps!

Answer 2

Answer: N= -8
This is the work :

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If an iceberg has a mass of 1800 kg and a volume of 19000 m3, what
is its density?

Answers

Answer:

≈0.0947 kg/m^3

Step-by-step explanation:

p = density

m = mass

v = volume

Formula for density :

p = m/v

We know the mass and volume, so we can simply substitute our values into the equation:

p = m/v

p = 1800kg / 19000 m^3

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A company wants to installan underground storage tank that is in the shape of acylinder with both ends being in the shape of a hemisphere. The tank will have anoutside diameter of 20 feet and a total length of 50 feet (that is from the tip of one end ofthe hemisphere shape to the tip of the other hemisphere shape)lf the walls of the tankare 3 inches thick, what is the volume of the tank in cubic feet and how many gallons ofliquid can be contained in the tank (1 cubic foot 7.48 gallons)?

Answers

wallsare 3 inches thick
diameter is 20 feet, find real diametter
legnth is 50 feet, find real legnth

minus 6 inches from each measurement since that is not included

20ft-6in=19.5ft
50ft-6n=49.5ft

we have a cylinder and a 2 hemispheres
2 hemispheres=1 sphere

Vcylinder=hpir^2
Vsphere=(4/3)pir^3

r=d/2
r=19.5/2=9.75
h=49.5

Vcylinder=49.5*pi*9.75^2=14783.058738886 ft^3
Vspere=(4/3)pi9.75^3=388419466778 ft^3
add them
Vcylinder+Vspher=14783.058738886+388419466778 ft^3=18665,478205664ft^3

V=18665,478205664 ft^3
times 7.48 to find gallons
Vingallons=139617.77697837 gallons

Use the gcf and the distributive property to express the sum as a product 20 35

Answers

common factor of 20= 1,2,4,5,10.......
common factor of 35=1,5,7.............
so here we find that 1 and 5 r the common factors
but the GCF of 20 and 35 is 5
so,
by using GCF the distributive property is : 5(4+7)

What is 563 rounded to nearest 10

Answers

The answer is 560 because if say you had to round 567 to the nearest ten, that would be 570 because the nearest 10 to 67 is 70, but here you have 563 so the nearest 10 to 63 is 60 :)

You deposit $3000 into an account that pays 4.8% interest, compounded monthly. A) What is the value of the account after 5 years?B) How long will it take for the value of the account to reach $6000?

Answers

Answer:

14.4 years (about 14 years 6 months)

Step-by-step explanation:

Given data

Principal= $3000

Rate= 4.8%

A. Time= 5 years

The expression for compound interest is

A=P(1+r)^t

Substitute

A= 3000(1+0.048)^5

A= 3000(1.048)^5

A=3000*1.264

A=$3792

Hence the balance will be $3792

B. Final Amount A = $6000

The expression to find time is given ast

t= ln(A/P) / r

substitute

t= ln(6000/3000)/0.048

t= ln2/0.048

t= 0.6931/0.048

t=14.43

Hence the time is 14.4 years (about 14 years 6 months)approx

This is ur problem sis u got thisWhich of the following is equivalent to 16a2 – 49
A. (4a – 7) (4a – 7)
B. (4a + 7) (4a – 7)
C. (7 – 4a) (7 – 4a)
D. (7 + 4a) (7 – 4a)

Answers

B. is your correct answer.

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