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marusya05 [52]
3 years ago
14

Three babies A,B and C cry out at interval time. Baby A cries out at every 20 mins, while B cries out at every 30 mins and C cri

es out at every 40 mins. if they are observed at the same time, after what time will the three of them cry together?
A. after 20 minutes
B. after 30 minutes
C. after 40 minutes
D. after 120 minutes​
Mathematics
2 answers:
BabaBlast [244]3 years ago
6 0
The answer will be D. After 120 minutes, because by looking at the three numbers, 20, 30, and 40, you have to find the common multiple for all three numbers, and in this case, 120 will fit all three numbers perfectly.
Kaylis [27]3 years ago
3 0
They all cried 210 minutes if u want it in hrs divide
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A lunette is a semicircular window that is sometimes placed above a doorway or above a rectangular window. A certain lunette has
soldier1979 [14.2K]

A lunette is a semi-circle, which means that it is one half of a circle. To find its area, we can find the area of the whole circle and divide it by two.

Area of a circle: A = pi x r^2

r = 40 / 2 = 20

A = pi x 20^2

A = 400pi / 2 = 200pi

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The area of the lunette is approximately 628 in^2.

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8 0
4 years ago
2y-x=3/4(-y+1) solve for y
liubo4ka [24]

Answer:

(4x + 3)/11

Explanation:

2y -x = 3/4(-y + 1)        Multiply both sides by 4

8y – 4x = 3(-y + 1)        Remove parentheses

8y – 4x = -3y + 3         Add 3y to each side

11y -4x = 3                    Add 4x to each side

11y = 4x + 3                  Divide both sides by 11

y = (4x + 3)/11

8 0
3 years ago
In Jamal's county, there are
7nadin3 [17]

Answer:

139.5

Step-by-step explanation:

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8 0
3 years ago
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A line passes through the points (4, 9) and (12, 20). What is the slope of the line?
Mashutka [201]

Answer:

\frac{11}{8}

Step-by-step explanation:

→ State the gradient formula

( y₂ - y₁ ) ÷ ( x₂ - x₁ )

→ Find x₁ , x₂ , y₁ and y₂

x₁ = 4 , x₂ = 12 , y₁ = 9 and y₂ = 20

→ Substitute in the values

\frac{20-9}{12-4}

→ Simplify

\frac{11}{8}

4 0
3 years ago
Regina makes skirts which need 3/4 ounces of beads per skirt. She has 5 5/14 ounces of beads, how many can she make?
Alex
3/4 - per skirt >> 0.75
5 5/14 - unused >> 5.36 (approximately)

5.36/0.75= 7.14666...

Regina can make 7 skirts




7 0
3 years ago
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