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Anna007 [38]
3 years ago
12

Which of the following expressions is equivalent to 1/3-5/7

Mathematics
1 answer:
Artemon [7]3 years ago
3 0
It's D and i should know
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First, rewrite<br> 7/9 and 16/21<br> so that they have a common denominator.
sattari [20]
49/63 and 48/63..........
5 0
3 years ago
Item 12
kozerog [31]

Answer:

The height is 4.472

Step-by-step explanation:

That formula is Heron's formula.

Where "s" is calculated like this:

s = (a + b + c) / 2

In this case:

a = 14

b = 12

c = 6

replacing:

s = (14 + 12 + 6) / 2

s = 16

Now we calculate the area:

A ^ 2 = 16 * (16−14) * (16−12) * (16−6)

A ^ 2 = 1280

A = 35.777

The area of the triangle is:

A = b * h / 2

In this case we will take the base as the longest side of the triangle, that is to say = 14

Thus:

h = A * 2 / b

h = 35.777 * 2/16

h = 4.472

So the height is 4.472

4 0
3 years ago
Charmaine pays $848 for landscaping rocks for a project. The cost per pound is 32 cents. How many pounds did she purchase? 0.265
krok68 [10]

Answer:

2,650 pounds

Step-by-step explanation:

Given data

Amount paid= $848

Rate = 32 cents= $0.32

Hence the amount she purchased is

Quantity= Amount* Rate

Quantity = 848/0.32

Quantity= 2650

3 0
3 years ago
Read 2 more answers
What is the area of the triangle?
Luda [366]

Answer:

270cm^2

Step-by-step explanation:

The side length is irrelevant and does not matter.

The area of a triangle is found by multiplying the base by the height and then dividing that by two.

For this problem it would be...

30*18=540

540/2=270

So the area would be 270cm^2

3 0
3 years ago
What is the base higher and area
algol13

Answer:

5

8

20

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
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