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2 years ago

Which is a solution to 2x + 1 = 21?

Mathematics

1 answer:

Bezzdna [24]2 years ago

4 0

Answer:

x = 10 is your answer

- Explain -

Step 1: subtract 1 from both sides (subtraction of equality)

which will give us:

2x = 21 - 1

which equals to

2x = 20

Step 2: Divide both sides by 2

which is

2x/2 = 20/2

2/2 = 1 and 20/2 = 10

Therefore the answer is x = 10

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The men s clothing buyer had a group of 50 jackets priced at $250 each that was selling very slowly. To stimulate sales of these

erastovalidia [21]

Answer:

The answer is $3000.

Step-by-step explanation:

The men's clothing buyer had a group of 50 jackets priced at $250 each.

Total price of jackets = $50\times250=12500$ dollars

The buyer reduced the price of the jackets in that group to $200 and 40 jackets were sold.

So, the price for selling 40 jackets is = $40\times200=8000$ dollars

Remaining jackets = $50-40=10$

These were sold at $150 each, totaling to = $10\times150=1500$ dollars

So, overall money earned by reducing prices both time = $8000+1500=9500$ dollars

And the markdown in dollars = (original price before reducing) minus (educed total price)

= $12500-9500=3000$ dollars

So, the answer is $3000.

3 0

2 years ago

Consider the universal relation r = {a, b, c, d, e, f, g, h, i, j} and the set of functional dependencies f = { {a, b } → {c}, {

nekit [7.7K]

Answer:

relation of FDs are {a, b, d, h}. From these all but {h}

seem plausibly part of keys. Calculating the closures of likely candidates gives:

{a, b} + = {a b, c, i}

{b, d} + = {b, d, e, f}

{a, d} + = {a, d, g, h, i, j}

{a, b, d} + = {a, b, c, d, e, f, g, h, i, j}

decompose r into 2nf and then 3nf relations shown in attachment.

Step- by-Step Explanation

Explanation is given in the attachment.

8 0

3 years ago

IMPORTANT! WILL VOTE BRAINLIEST!!!

nikdorinn [45]

Answer:

The value of the ve = 9m/sec

Step-by-step explanation:

From the given formula, it can be conclude that this is evenly accelerated movement.

First I will rewrite given formula

vi = √ ve∧2 - 2ad First we will square on both sides and get

vi∧2 = ve∧2 - 2ad Now we will add monom (+2ad) to both sides and get

vi∧2 + 2ad = ve∧2 -2ad + 2ad =>

ve∧2 = vi∧2 +2ad Now we will rooted both sides and get

ve = √vi∧2 + 2ad

Now we will replace given data vi=7m/sec, a=8m/s∧2 and d=2m in the last formula

ve= √7∧2 + 2*8*2 = √49+32 = √81 = 9

ve= 9m/sec

Good luck!!!

7 0

2 years ago

What is 63.48 rounded off to 1 decimal place?

Lilit [14]

Answer:

63.5

Step-by-step explanation:

5 0

2 years ago

70 points and i’ll give brainliest!! please answer all the questions on the page! must show work and how you got the answer. ple

Bezzdna [24]

6. One variable only so pretty straightforward.

length-x+4

width-x

x+x+4=80

2x=76

x=38

x+4=42

answer: length 42cm and width 38cm

7. Another money problem!

n-# of nickels

q-# of quarters

n=3+q

0.05n+0.25q=2.85

Substitution works like a charm!

0.05(3+q)+0.25q=2.85

0.15+0.05q+0.25q=2.85

0.3q=2.7

q=9

n=3+q

n=3+9

n=12

answer: 9 nickels and 12 quarters

8. One variable situation again.

Ann's money-2b+9

Betty's money-b

b+2b+9=60

3b=51

b=17

2b+9=43

answer: Ann has $43 and Betty has $17.

9. # of red m&m's-x+1

# of blue m&m's-x

x+1+x=13

x=6

x+1=7

answer: 6 blue and 7 red m&m's

10. a-number of adult tickets

s-number of student tickets

a+s=785 ----> a=785-s

5a+2s=3280

5(785-s)+2s=3280

-3s=-645

s=215

a+s=785

a+215=785

a=570

answer: 215 children tickets and 570 adult tickets

3 0

2 years ago