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Svetlanka [38]
4 years ago
9

5y+ 2y -4 Help Pleaseee.

Mathematics
1 answer:
gregori [183]4 years ago
8 0

Answer:

4/7 or 0.5712

Step-by-step explanation:

5y+2y - 4

5y+2y = 4

7y=4

y=4/7 or 0.5712

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A closed cylindrical tank of radius 1.50m and height 300cm, is made from a metal sheet. How much sheet is required?
Anika [276]

Answer: 13.5π≈42.41

Step-by-step explanation:

Basically it is asking for the circumference of this cylinder.

#1 Find the circumference of the circle base

Formula to use: 2πr

2πr=2π(1.5)=3π

---------------------------

#2 Find the area of the circle base

Formula to use: πr²

πr²=π(1.5)²=2.25π

--------------------------

#3 Find the area of body of the cylinder

Formula to use: lw

300cm=3m

l (length)= 3π (since the body of the cylinder the basing on the circumference of the circle base)

w (width)= 3

lw=3π×3m=9π

----------------------------

#4 Add all of them together

There are 2 base and one body

2.25π×2+9π=13.5π

4 0
3 years ago
PLEASE HELP ME ASAPP
tatuchka [14]

Answer:

B. perpendicular

Step-by-step explanation:

the lines AC and CH touch creating a 90 degree angle, so they are perpendicular lines

4 0
3 years ago
According to the fundamental theorem of algebra, how many roots does the following equation have?
Katen [24]

Answer:

n

Step-by-step explanation:

While you did not specify the equation, there are n roots for an equation of n power.

i.e. anything that x, power is 1, only one root

For x^{2}, there are two roots

For x^{n}, there are n roots

5 0
3 years ago
What is a. 11/12 - 7/12 b. 1/2 + 1/8 + 3/4 c. 3/4 - 1/6 ( all in simplified mode )
morpeh [17]
A. when subtracting fractions with the same denominator, simply subtract the numerators and keep that number over the original denominator.  Thus 11/12-7/12 becomes 4/12.  But, this answer is not reduced because 4 is a factor of both the numerator and the denominator.  Thus, divide  4 by 4 and 12 by 4 to get the new numerator and denominator.  Your final fraction is 1/3.

b.  In this expression, the fractions do not all have the same denominator, so you cannot subtract them yet.  Your largest denominator is 8 but not all the other denominators are factors of 8.  So to make a common denominator with all the fractions, you need to find a number that all the denominators are factors of.  One example in this case is 24.  Each of these fractions must then be expressed in terms of this common denominator.  To do this, you need to find what can be multiplied by the original denominator to make 24.  In other words, divide 24 by the original denominator and multiply that answer by the original numerator.  In the case of 1/2, 24/2 is 12 and 12 x 1 is 12.  Thus, the new fraction is 12/24.  The second fraction is also done this way: 24/8=3 and 3x1 is 3 so the new fraction is 324.  The third fraction should be handled the same way: 24/4 is 6 and 6x3 is 18 so the new fraction is 18/24.  Finally, in 1/6, 24/6 is 4 and 4x1 is 4 so the new fraction is 4/24.  Then, like the previous problem, when you perform 12/24 + 3/24 + 18/24-4/24= 29/24.  Since 29 is larger than 24, this should be reduced.  Do this by subtracting the denominator from the numerator and keep the remaining fraction.  The final answer is 1 and 5/24.
5 0
4 years ago
Please help me anyone ;-;
JulsSmile [24]

Answer:

hi

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
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