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Hatshy [7]
4 years ago
7

Select all equations which are equivalent to 2(x +3) =20

Mathematics
2 answers:
OleMash [197]4 years ago
8 0
2x + 3 = 20
Subtract 2 from both sides
2x= 27
X= 13.5
notka56 [123]4 years ago
8 0
1 and 5.. because on 1 you decide by 2 by everything...and on 5 you distribute
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Convert 3.4 meters to centimeters. cm<br> can someone pls help thx! :&gt;
valentina_108 [34]

Answer: 340 centimeters

Step-by-step explanation: Just times 3.4 by 10 to get 340 centimeters.

Hope this helped!

Please mark brainliest if you feel like it!

8 0
3 years ago
810 x 35 =<br> Standard algorithm
kipiarov [429]
810
x35
4050
2430
= 28,350

Therefore the answer is 28,350
6 0
2 years ago
Two mechanics worked on a car. The first mechanic worked for 5 hours, and the second mechanic worked for 15 hours. Together they
Lunna [17]

Answer:

The mechanic who worked 5 hours charged $115 per hour, the one who worked 15 hours charged $120 per hour.

Step-by-step explanation:

x = rate of mechanic who worked 5 hours

y = rate of mechanic who worked 15 hours

Then

x + y = 235

5x + 15y = 2375

Just solve these 2 equations above for x and y.

x + y = 235 ⇒ x = 235 - y

Substitute into second equation to find y.

5(235 - y) + 15y = 2375

1175 - 5y + 15y = 2375

10y = 1200

y = 1200/10 = 120

x = 235 - y = 235 - 120 = 115

5 0
2 years ago
I'm in 8th grade and I have no idea what positive-negative square roots are! We have a test soon and I need someone to explain t
Alexxx [7]
OK.  Here we go:

What is the square root of  9 ?

You would say that  3  is, and you're correct.
But that's NOT the <em>only one</em> there is !

What about  -3 ?

What do you get when you multiply  (-3)  times  (-3)  ?

(Remember that when the signs of both numbers are <em>the same</em>,
the answer is positive.)

(-3)  times  (-3)  =  9

So  -3  is <em>also</em> the square root of  9 .

That's right . . . every number has <em>two</em> square roots.  They're both the
same number, but one is positive, and one is negative.  When you
multiply <em>either one</em> of them by itself, you get the original number. 

Another way to say the same thing is:
Every number has one positive square root and one negative square root,
and except for the signs, they're both the same number.
6 0
3 years ago
An article is bought for Rs.5000 and sold of the cost price.What is the profit percent?
Delicious77 [7]

Answer:

cost price = 5000 rs.

selling price = 6500 rs.

as selling price > cost price there is a profit

profit = selling price - cost price = 6500 - 5000 = 1500 rs.

profit percentage = profit x 100 / cost price = 1500 x 100 / 5000 = 30 %

7 0
4 years ago
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