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3 years ago

1/2x - 7 = 1/3(x - 12)

Mathematics

2 answers:

Annette [7]3 years ago

7 0

Answer:

i think the answer is x= 9/35

Step-by-step explanation:

Anastaziya [24]3 years ago

5 0

Answer:

x = 18

Step-by-step explanation:

Given

$\frac{1}{2}$ x - 7 = $\frac{1}{3}$ (x - 12)

Multiply both sides by 6 ( the LCM of 2 and 3 ) to clear the fractions

3x - 42 = 2(x - 12) ← distribute

3x - 42 = 2x - 24 ( subtract 2x from both sides )

x - 42 = - 24 ( add 42 to both sides )

x = 18

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A club decides to sell T-Shirts for $12 each as a fundraiser. It costs $20, plus $6 per T-shirt to make the T-shirts. Write and

Lady bird [3.3K]

Answer:

20 t shirts

Step-by-step explanation:

let x be the no.of t-shirts made

12x=money made

20+6x=cost

money made -cost=profit

12x-(20+6x)=100

12x-20-6x=100

6x-20=100

6x=100+20

6x=120

x=120÷6

x=20 t-shirts

6 0

3 years ago

You have 80 grams of a radioactive kind of vanadium. How much will be left after 48 days if it’s half-life is 16 days?

Tresset [83]

10 grams Vanadium will be left after 48 days

Further explanation:

Half-life is the time after which the chemical is reduced to half.

The reaming mass after half life is given by:

$mass\ fater\ half\ life=\frac{Original\ mass}{2}$

The formula for calculating the remaining mass after given time period is:

$Remaining\ substance=\frac{1}{2^n}*mass$

Here n is the number of half lives passed

Now,

Given

Mass=80 grams

Time= 48 days

Half-life = 16 days

The number of half lives will be:

$n=\frac{48}{16}=3$

Putting the values of n and mass in the formula

$Remaining\ substance=\frac{1}{2^3}*80\\=\frac{1}{8}*80\\=10\ grams$

10 grams Vanadium will be left after 48 days

Keywords: Half-life, radioactive

Learn more about half-life calculation at:

#LearnwithBrainly

6 0

3 years ago

PLEASE HELP ASAP! WILL MARK BRAINLIEST

devlian [24]

Answer:

he called 1 page and 1/4

Step-by-step explanation: so 5/8+5/8=10/8 sooo.. simpify that and get 1 1/4

1 1/4

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3 years ago

A store must sell at least 400 worth of wallets and bags per day each wallet costs 20 each and each item cost 40 each. The store

maw [93]

Answer:25

Step-by-step explanation: 16x25=400

8 0

4 years ago

Anna is planning on making a circular garden. If the diameter of the garden is 21 meters, what is the circumference?

Ksenya-84 [330]

The answer is A. 65.94m

3 0

4 years ago