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prisoha [69]
3 years ago
7

If i was asked to think of a number and multiply it by 2, I could write this algebraically as 2x.write the following agebraicall

y, using x as your unknown. ''I think of a number,multiply it by 3 and add 1 to the result
Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0
I think it’s 3x = y + 1
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It takes two hours for two machines to manufacture 10000 parts. If machine #1 can do the job in one hour less than machine #2, h
elena-14-01-66 [18.8K]

Answer:

Time machine one = 3.56

Time machine two = 4.56

Step-by-step explanation:

Let machine 2 do the job in x hours

Let machine 1 do the job in x - 1 hours.

The general formula for this problem is

Time = A*B/(A + B)

Givens

Time = 2 hours

B = x hours alone

A = x - 1 hours alone.

#################

x *( x - 1)

======= = 2

(x + x - 1)

(x^2 - x)/(2x - 1) = 2

x^2 - x = 2(2x - 1)

x^2 - x = 4x - 2

x^2 - 5x + 2 = 0

a = 1

b = - 5

c = 2

This gives 2 roots

x = 4.56

x = 0.43

The second root will not work because when 1 is subtracted from 0.43 the time give will be minus, which won't work.

Time for machine 2 is 4.56

The time for machine 1 is 3.56

Check

(A * B)/(A + B) = 2

A = 4.56

B = 3.56

Time = 4.56*3.56/(4.56 + 3.56)

Time = 16.2336/(8.12)

Time = 1.9992

The rounding error in the check comes from the rounding error in the times.  

4 0
3 years ago
Choose an equation of a line through the point (-4, -2) parallel to y=14x−3.
Likurg_2 [28]

Answer:

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3 0
3 years ago
Diego paid $46.50 for 3 concert tickets while Andrea paid 139.50 for 9 tickets. Marisol states that Diego got the better deal be
Darina [25.2K]

Answer:

Marisol is incorrct Diego and Andrea paid the same amount for each ticket . This is because 46.5 times 3 equals to 139.50 so each ticket cost the same amount of money.Since Andrea paid for 9 tickets and Diego for 3 you multiply the cost by 3 so you get the answer and see if its less or greater than Andreas aount of money.

Step-by-step explanation:

7 0
3 years ago
HELP ASAP! WILL MARK BRAINLIEST!!​
malfutka [58]

Answer:

r = 6

Step-by-step explanation:

V(cyl) = π · r² · h

144π =  π · r² · 4

144 = r² · 4

<u>144</u> = r²

 4

r = \sqrt{144} ÷ \sqrt{4}

r = 12/2

r = 6

5 0
3 years ago
HELP MY GRADE 9 PLS AND THANK YOU
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Answer:

64x²y²

Step-by-step explanation:

Use the great smart calculator

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