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Galina-37 [17]
3 years ago
12

What is -3 1/9 + 2 3/9

Mathematics
2 answers:
laila [671]3 years ago
7 0

Answer:

= -7/9

(Decimal: -0.777778)

White raven [17]3 years ago
7 0
7/9...................
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Jessica fills a cube shaped tank that has an edge of 70 cm with water from a tap. Water flows into the tank at a rate of 7L per
daser333 [38]

The volume of the tank is (70 cm)³ = 343,000 cm³.

Now,

1 mL = 1 cm³

1 L = 1000 mL

so we convert the given rate to

\dfrac{7\,\rm L}{1\,\rm min} \cdot \dfrac{1000\,\rm mL}{1\,\rm L} \cdot \dfrac{1\,\mathrm{cm}^3}{1\,\rm mL} = \dfrac{7000\,\mathrm{cm}^3}{1\,\rm min}

Then the time it will take to fill up the tank is

343,000\,\mathrm{cm}^3 \cdot \dfrac{1\,\rm min}{7000\,\mathrm{cm}^3} = \boxed{49\,\rm min}

6 0
2 years ago
Find the area of a 2-inch-wide decorative border around a rectangular canvas painting, where L is the length and W is the width
lions [1.4K]

Answer:

  4L +4W +16 square inches

Step-by-step explanation:

The area of the border is the equivalent of that of a rectangle with a width equal to the width of the border, and a length equal to the length of the midline of the border. That length is the perimeter of the rectangle that is L+2 units long and W+2 units wide.

  border midline length = 2((L+2) +(W+2)) = 2L +2W +8

Then the border area is ...

  border area = (border width)(border length) = (2)(2L +2W +8)

  border area = 4L +4W +16 . . . square inches

_____

You can also figure this as the difference between the area of the rectangle with the border and the area of the rectangle inside the border:

  border area = total area - canvas area

  = (L+4)(W+4) -LW = LW +4L +4W +16 -LW

  = 4L +4W +16 . . . . square inches

4 0
3 years ago
Which set of 3 sides could make a triangle?
scoundrel [369]

Answer: any set of the choices given can make a triangle.

The shapes and sizes will be different, of course. None of the sets given will produce a Right Triangle.

Step-by-step explanation:

7 0
3 years ago
1/4 + 1/4 +1/4 = 3 * 1/4 =​
konstantin123 [22]

Answer:

3/4

Step-by-step explanation:

4 0
4 years ago
Read 2 more answers
According to National Surveys on basic scientific knowledge, 80% of high school students can correctly state that the Earth revo
algol13

Answer:

b) Both 1,004 and 251 are greater than 10.

Step-by-step explanation:

p = 0.80

n = 1255

In order to use CLT the distribution of \hat{p} should have np and n(1-p) greater than 10.

np = 1255*0.80

np = 1004

n(1-p) = 1255*0.20

n(1-p) = 251.00

Since Both 1004 and 251 are greater than 10,

4 0
4 years ago
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