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Studentka2010 [4]
3 years ago
8

what expression is equivalent to 2x+9-x+3? show your answer is correct by substituting a value for x.

Mathematics
1 answer:
Sedbober [7]3 years ago
4 0
Collect like terms
(2x-x) + (9+3)

Simplify
x+12
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Solve for x. x +1/2 = 3/4
Alexeev081 [22]

x + 1/2 = 3/4

set denominators equal:

x + 2/4 = 3/4

-2/4 for both sides:

x = 1/4

there you go! hope this helps!

4 0
3 years ago
Read 2 more answers
in a small machine shop, eight 5-gallon drums of oil are on hand. if 2 gallons are used each day and the owner wants a 30-day su
zavuch27 [327]
If 2 gallons of oil are used a day, than he will need 60 gallons of oil, because 30x2=60. For 60 gallons of oil, you would have to have 12 drums because 60÷5=12. Because there is already 8 drums of oil, there would already be 40 gallons because 8x5=40. If the owner already had 40 gallons of oil, they would only have to get 20 more gallons because 60-40=20. That would be 4 drums because 20÷5=4. The owner would have to order 4 more drums of oil.
4 0
3 years ago
Simon leans a 20 ft ladder against the side of his house so that the base of the ladder is
finlep [7]
The answer is 19.4
Most of the time when you try to find a missing length of a right triangle you use Pythagorean theorem. Pythagorean theorem is A squared plus B squared equals C squared. C squared is always going to be the longest length/diagonal line otherwise known as your hypotenuse. In this case the ladder is the hypotenuse. So instead of adding five squared +20 squared you’re going to square 20 and then subtract five squared to get the missing length which would be B squared and then you have to find the square root of B squared. So 20 squared is 4000. 5squared is 25 400-25 = 375 square root of 375 is about 19.4.

7 0
3 years ago
if i I wanted to be precise, how can I express the exact circumference for the circumference given the diameter
sveticcg [70]
The formula for circumference is \pi d.

To express the circumference exactly, plug the diameter in for d and put the \pi symbol in front of it. Don't multiply. This expresses the exact circumference.

Say you have the diameter of 17.
You can express the circumference with 17\pi.
6 0
3 years ago
Item 7
Katyanochek1 [597]

i am sorry i was gonna anwer but i keep getting it wrong mys elf

4 0
3 years ago
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