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Zarrin [17]
3 years ago
10

Explain how you know that 4/5 =8/10

Mathematics
1 answer:
Alina [70]3 years ago
3 0

Answer:

have:

\frac{4}{5}  =  \frac{4.2}{5.2}  =  \frac{8}{10 }

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PLEASE PLEASE HELP!!
Sloan [31]

Answer:

Step-by-step explanation:

11)

A= (B x H)/2

A= (2.9x3.2)/2= 4.64cm²

12)

A= (B+b)H /2

A= (12+10)5.6 /2 = 61.6in

3 0
3 years ago
Read 2 more answers
Help me out not all just what you can
lara31 [8.8K]

9514 1404 393

Answer:

  1e. 2t² +8t -6

  2h. a² +2ab -3b²

  3b. 8r +4

  4b. 6x +4y -11

  5b. e -3

Step-by-step explanation:

1e. Combine like terms.

  (3t² +3t -6) +(-t² +5t) = t²(3 -1) +t(3 +5) -6

  = 2t² +8t -6

__

2h. (2a² +3ab -4b²) -(a² +ab -b²)

Use the distributive property to eliminate parentheses. Note that all signs change in the second set of parentheses.

  = 2a² +3ab -4b² -a² -ab +b² = a²(2 -1) +ab(3 -1) +b²(-4+1)

  = a² +2ab -3b²

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3b. The hash marks indicate sides of the same length. The perimeter is the sum of all side lengths.

  P = (4r -2) +2(2r +3)

  P = 4r -2 +4r +6 . . . . . . eliminate parentheses

  P = 8r +4 . . . . . . . . . . . . combine like terms

__

4b. (3x +4y) +(5x -8) -(2x +3)

Note that the distributive property changes the sign of all terms in the last parentheses.

  = 3x +4y +5x -8 -2x -3 . . . . eliminate parentheses

  = x(3+5-2) +y(4) +(-8-3) . . . group like terms

  = 6x +4y -11

__

5b.

  Bill's age - Erin's age = (2e-3) -(e) = e -3

The difference in their ages is (e -3).

6 0
3 years ago
A line segment has endpoints (4,7) and (1,11). What is the length of the segment?
vredina [299]
You can use the distance formula for this:

√(x2-x1)²+(y2-y1)²

so you'll get √(1-4)²+(11-7)² = √(-3)²+(4)² = √9+16 = √25 = 5 and 5 is your answer
5 0
3 years ago
Will mark brainliest! IMPORTANT
enot [183]

Answer:

  P(x) = 3.88x -1750

Step-by-step explanation:

Profit is the difference between revenue and cost.

  P(x) = R(x) - C(x)

  P(x) = 4.1x -(0.22x +1750) . . . . . substitute the given expressions

  P(x) = 3.88x -1750 . . . . . . . . . . simplify

4 0
3 years ago
Why not?<br> If 4 + 6 = 10, does (4 + 6) X 3 = 10 X 3? Why<br> or why not?
IgorLugansk [536]

Answer:

It would be 10*3

Step-by-step explanation:

If we follow the rule of BIDMAS or BODMAS, they both have Brackets to be done first.

By meaning we must do 4+6 as it is in the bracket. Then we multiply our answer by 3.

7 0
3 years ago
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