How to add and subtract fractions

Answers

Answer 1

Answer: You need to find the common denominator of all of the fraction and you also have to do whatever you did to the bottom to the top. So if you times the bottom by 2 you need to times the top by two. Then once you have that you can add and subtract!

Answer 2

Answer: You need to find the common denominator.

In your question :

4 2/7 - 2 1/5
= 4/1 * 2/7 - 2/1 * 1/5
= 8/7 - 2/5 ⇒ There, the common denominator is 7 * 5 = 35
= (8*5)/(7*5) - (2*7)/(5*7)
= 40/35 - 14/35
= (40-14)/35
= 26/35

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An axiom of Geometry says that if _____ points lie in a plane, the _______ containing them also lies in the same plane.

Answers

If TWO points lie in a plane, the LINE containing them also lies in the same plane.

10 times as many as 1 ten is ______ tens.

Answers

same 10 tens I guess

Final answer:

The phrase '10 times as many as 1 ten' simply means making 10 groups that are exactly the size of 1 ten (which is your original amount). Hence, '10 times as many as 1 ten' is equal to ten tens.

Explanation:

In a mathematical perspective, when you have 1 ten and you want to find out what 10 times as many is, you simply multiply your original amount by 10. In this case, if you multiply 1 ten by 10, the product is 100. However, when you look at it in terms of tens, your original amount is simply 1 group of ten, and if you create 10 groups exactly that size, you end up with 10 tens. So 10 times as many as 1 ten is 10 tens.

Learn more about Multiplication here:

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Lebron James shot the ball 1103 times during the 2019-2020 basketball season. He made 643 of the shots. What is his shooting percentage?

Answers

Answer:

1.71539657854

Step-by-step explanation:

If you have a semi-circle with a diameter of 8.6ft, what's the semi-circles area? Use the formula $\pi r^(2)$

Answers

So,

The diameter is 8.6ft. We need to convert to radius.

2 radius = 1 diameter

8.6/2 = 4.3 ft.

$\pi r{2}$

$\pi 4.3^(2)$

$\pi 18.49$

3.14(18.49)

58.0586ft.²

Divide by 2 (semi-circle)
29.0293ft.²

If dy/dx=1/x, then the average rate of change of y with respect to x on the closed interval [1, 4] is a) -1/4
b) (1/2)*ln(2)
c) (2/3)*ln(2)
d) 2/5
e) 2

Answers

The first thing to do here is to integrate the ordinary differential equation dy/dx = 1/x. This is equal to y = ln x + C. Assuming C is zero. y = lnx. substituting the two interval,
y1 = 0 y2 = ln 4
the rate of change then is equal to (ln4 - 0) / (4-1) equal to 2/3 ln 2. Answer is C

Find the distance between the points (1, 4) and (-2, -1).