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madreJ [45]
2 years ago
11

SHOW WORK: ok now after that other stuff i have 10 more questions im ligit crying rn i need to sleep im very tired plz help me..

. YOU GET BRAINLIEST
Evaluate the expression: 3/8 + 2/6

Evaluate the expression: 2 1/4 - 3/6 (simplify)

What is the sum of 3 4/5 and 1 1/3?

What is the difference of 6 and 2 1/5?

Chris mowed 1/3 of his yard in the morning and then 3/6 of his yard in the afternoon. How much of his yard has Todd mowed so far?

Aoife has a piece of wood that measures 2 2/9 feet. She cut off 1 1/3 feet of wood for a project. How much wood does she have remaining?

COMPARE: 2/9 3/14
Mathematics
2 answers:
monitta2 years ago
6 0
The person who answered deserved way more points
tiny-mole [99]2 years ago
5 0

Answer:

1) So, you're going to add fractions. 3/8 + 2/6 =

Step-by-step explanation:

1) First, you find the LCD. (<em>Least Common Denominator) </em>The lowest common number between 6 and 8 is 24. So,

3/8 = 3 x 3/8 x 3 =9/24

2/6 = 2 x 4/ 6 x 4 =8/24

Now add.

8/24 + 9/24 = 17/24

Ans: 17/24

2)  First, you make 2 1/4 into an <u>improper fraction</u>. So, add 8 to 1/4.

1/4 + 8 = 9/4

Now, find the LCD. (<em>Least Common Denominator)  </em>The mallest number that 6 and 4 both equal is 12. So-

9 x 3/ 4 x 3 = 27/12

3 x 2/6 x 2 =6/12

Subtract.

27/12 - 6/12 = 21/12

Simplify.

21/12. Divide both the numerator and the denominator by 3.

21 ÷ 3/12 ÷ 3 = 7/4

Make it a Mixed Number.

7/4 = 1 3/4

Ans: 1 3/4

3) Do the same steps for Number 1. I'll show them again.

First, make both fractions <u>improper fractions</u>.

3 4/5 = 19/5

1 1/3 = 4/3

First, you find the LCD. (<em>Least Common Denominator) </em>The lowest common number between 5 and 3 is 15. So,

19/5 = 19 x 3/5 x 3 = 57/15

4/3 = 4 x 5/3 x 5 = 20/15

Now subtract.

57/15 - 20/15 = 37/15

Now make it an <u>mixed number</u>.

37/15 = 2 7/15

Ans: 2 7/15

4) First, make 6 into a fraction. 6 = 6/1.

Then, make 2 1/5 an improper fraction.

2 1/5 = 11/5

Find the LCD. (<em>Least Common Denominator)</em>

The lowest number that 1 and 5 have in common is 5.

6 x 5 / 1 x 5 = 30/5

11 x 1 / 5 x 1 = 11/5

Now, subtract.

30/5 - 11/5 = 9/5

Now make 9/5 a <u>mixed number</u>.

9/5 = 1 4/5

The others are word problems, and I'll answer them in a separate comment, hope these help. :)

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chubhunter [2.5K]

Answer:

40 or 16+6+6+6+6

Step-by-step explanation:

To find the surface area of a 3d figure, we can imagine all of its faces laid down on a flat plane. In this case, we would have a square, and four congruent triangles. Now all we have to do is find the areas of each shape and add them up.

4 is the base of the pyramid, so it's also the square's side length. Since a square has four equal sides, our square's length and width are both 4.

4*4 = 16

For every triangle we have, the base is 4 and the height is 3. The area of a triangle can be found using the formula A=(bh)/2. We plug in the values:

A = (4*3)/2

A = (12)/2

A = 6

Since we have 4 triangles, the surface area is:

16+6+6+6+6 = 40

7 0
3 years ago
Given f(x)=x^2+5 and g(x)=2x^3-1 find (f/g)(-3)
AlekseyPX

For this case we have the following functions:

f (x) = x ^ 2 + 5\\g (x) = 2x ^ 3-1

By definition of composition of functions we have:

(f / g) (x) = \frac {f (x)} {g (x)}

Then substituting:

f (-3) = (- 3) ^ 2 + 5 = 9 + 5 = 14\\g (-3) = 2 (-3) ^ 3-1 = 2 (-27) -1 = -54-1 = -55

So:

(f / g) (- 3) = \frac {14} {- 55} = - 0.25

Answer:

(f / g) (- 3) = \frac {14} {- 55} = - 0.25

7 0
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