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Slav-nsk [51]
3 years ago
11

4 bags of cement do 18 m² how many m^2 can be done with seven bags

Mathematics
1 answer:
nikitadnepr [17]3 years ago
5 0

Answer:

31.5 m^2

Step-by-step explanation:

To find the amount for 7 bags, create a proportion.

\frac{4}{18} =\frac{7}{y}

To solve for y, cross multiply numerator to denominator of each fraction.

4(y) = 18(7)

4y= 126

y= 31.5

7 bags will do 31.5 m^2

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Answer:

B. -2 1/2 +3 1/4 = 3/4

Step-by-step explanation:

the starting point is -2 1/2, they added 3 1/4, and the ending point is 3/4.

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3 years ago
15. A cylindrical glass 10 cm tall and 8 cm in diameter is filled to 1 cm
ANTONII [103]

Answer:

No. The new height of the water is less than the height of the glass(6.33 cm<10 cm)

Step-by-step explanation:

-For the water in the glass to overflow, the volume of the inserted solid must be greater than the volume of the empty space or the ensuing height of  water >height of glass.

#Volume of the golf ball:

V=\frac{4}{3}\pi r^3\\\\=\frac{4}{3}\pi \times 4^3\\\\\approx 268.08\ cm^3

#The volume of the water in the glass:

V=\pi r^2 h\\\\=\pi \times 4^2\times 10\\\\\approx 50.27\ cm^2

We then equate the two volumes to the glass' volume to determine the new height of the water:

V=\pi r^2h\\\\(206.08+50.27)=\pi r^2 h\\\\h=318.35/(\pi \times 4^2)\\\\=6.33\ cm

Hence, the glass will not overflow since the new height of the water is less than the height of the glass(6.33 cm<10cm).

4 0
3 years ago
Waylon is back-to-school shopping with his mom at a large department
levacccp [35]

Answer:

Waylon's Purchase will cost $198.05, and section B depends.

Explanation: Section A is 85% of 233 since thats the total, making the answer to section A $198.05. The answer to section B depends because if he wants more school supplies, then yes, he would want to buy more things for better deals. But if he’s on a budget, then he wouldn't want to spend as much money since saving 20% on something over $300 is more than saving 15% on something over $200.

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2 years ago
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solong [7]

Answer:

7/8 < 15/16

Step-by-step explanation:

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so 7/8 < 15/16

3 0
3 years ago
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frez [133]

Answer:

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Step-by-step explanation:

Solve for x over the real numbers:

6 x^2 - 5 x = 56

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x^2 - (5 x)/6 = 28/3

Add 25/144 to both sides:

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Add 5/12 to both sides:

Answer:  x = 7/2 or x = -8/3

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3 years ago
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