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lord [1]
3 years ago
12

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to pa

int the house together? I did not get the answer t
Mathematics
2 answers:
astraxan [27]3 years ago
8 0

Sally can paint a house in 4 hours; Which means in 1 hour she can paint 1/4th of the house.

John can paint the same house in 6 hours. Which means in 1 hour she can paint 1/6th of the house.

Together in 1 hour they can paint: - 1/4 + 1/6 = 5/12th of the house.

Total Hours for painting the house together will be 12/5 = 2.4 Hours.

So the answer is 2 hours and 24 minutes

Please mark as brainliest

eduard3 years ago
8 0

Answer:

its 3

Step-by-step explanation:

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Definicion etimologica de la palabra poliedro
lesantik [10]

Answer:

Poli (muchas) edro (caras) luego sería muchas caras lo que representas las figuras poliédricas.

Step-by-step explanation:

La palabra poliedro viene del griego clásico πολύεδρον (polyedron), de la raíz πολύς (polys), «muchas» y de ἕδρα (hedra), «base», «asiento», «cara».

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Step-by-step explanation:

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8 0
3 years ago
Read 2 more answers
I need to know how to do these
Allisa [31]

I'll do one, you can use it as a basis for your answer.

7x ^{2}    + 6 = 13

Subtract 6 from both sides to get X by itself.

7x ^{2}  = 7

Now we divide by 7 for both sides as well.

x {}^{2}  = 1

Now we find the square root of 1 to figure out X.

\sqrt{1}  = 1

Therefore, X=1.

my first answer in about a month. hope this helped.

3 0
2 years ago
The variables x, y, and z vary jointly.
serious [3.7K]

Answer:

k = 18

when x = 4, y = 3, z = -24

Step-by-step explanation:

x = k * y * z

Find k when x = 4, y = 3, and z = 24

4 = k * 3 * 24

4 = k * 72

4 = 72k

k = 72/4

k = 18

find z when x = -3 and y = 4

x = k * y * z

-3 = 18 * 4 * z

-3 = 72 * z

-3 = 72z

z = 72/-3

z = -24

4 0
2 years ago
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