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vladimir1956 [14]
3 years ago
8

What is √ 63 − 4 √ 7??

Mathematics
1 answer:
tester [92]3 years ago
4 0

Answer:

- √7

Step-by-step explanation:

√63 = √9*7 = √9*√7

Sqrt(9) = 3

3√7 - 4√7 = -1√7=  -√7

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What is the square root of 49z^2
ahrayia [7]
√49z²
= √(7z)². [ here, Square cancles sq. root]
= 7z

May be Helpful.
Thank you!
7 0
2 years ago
Please help me with this
satela [25.4K]
Area of the trapezoid:
\frac{12.8 + 4.2}{2} (4.9) = 41.65 cm^2

Area of the rectangle:
4.2 x 3.1 = 13.02 cm^2

Area of each quarter circle:
\frac{ \pi  (3.1)^{2} }{4} = 7.54 cm^2

We have two quarter circles:
7.54 + 7.54 = 15.08

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5 0
2 years ago
Can someone please explain the math on this one to me? Thanks!
kodGreya [7K]

Answer:

18 men = 36 tons in 6 hours

Step-by-step explanation:

3 men = 1 ton in 1 hour

6 men = 2 ton in 1 hour

9 men = 3 tons in 1 hour

with this you find a pattern

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3 men = 3 tons in 3 hours

3 men = 6 tons in 6 hours

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9 men = 18 tons in 6 hours

12 men = 24 tons in 6 hours

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(This is how i worked it out)

8 0
3 years ago
Read 2 more answers
Find the exact value of x
Olin [163]

Answer:

7.07

Step-by-step explanation:

5sin90=xsin45

5/sin45=7.07

5 0
2 years ago
20.   The sum of two consecutive even integers is 158. Find the least of the two integers. 
Mumz [18]

Answer:

78

Step-by-step explanation:

The tricky part of this is figuring out how to assign the unknowns.  We are told that we are working with two consecutive even integers.  Consecutive means "next to" or "in order" and sum means to add.  If we use 2 and 4 as examples of our 2 consecutive even integers and assign x to 2, then in order to get from 2 to 4 we have to add 2.  So the lesser of the 2 integers is x, and the next one in order will be x + 2.  (2 and 4 are just used as examples; they mean nothing to the solving of this particular problem.  You could pick any 2 even consecutive integers and find the same rule applies.  All we are doing here with the example numbers is finding a rule for our integers.)  Now we have the 2 expressions for the integers, we will add them together and set the sum equal to 158:

x + (x + 2) = 158

The parenthesis are unnecessary since we are adding, so when we combine like terms we get

2x + 2 = 158 and

2x = 156 and

x = 78

That means that the lesser of the 2 integers in 78, and the next one in order would be 80, and 78 + 80 = 158

6 0
3 years ago
Read 2 more answers
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