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3 years ago

: John and Bob can paint a room in 12 days.

Mathematics

1 answer:

Flura [38]3 years ago

7 0

Answer:

48 days

Step-by-step explanation:

In terms of rooms per day, the rates add up as ...

(1/J +1/B) +(1/W +1/N) -(1/J +1/W) = 1/12 +1/16 -1/8

1/B +1/N = (4+3-6)/48 = 1/48

Bob and Nick working together can paint 1/48 of the room each day. It will take 48 days for Bob and Nick to paint the room.

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3 years ago

Read 2 more answers

Which is an equivalent expression for 4(x + 7) – 9

Diano4ka-milaya [45]

Answer:

4x + 19 is an equivalent expression

Step-by-step explanation:

4x + 28 - 9

so therefore

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8 0

3 years ago

PLZ help super fast thanks

Nikolay [14]

Answer:

B. $\frac{1}{x^2y^7}$

Step-by-step explanation:

Given:

$(x^3y^{-2}z)(x^{-5}y^{-5}z^{-1})$

Hence Solving the given expression we get;

By Law of Indices which states;

$(a^xb^yc^z)(a^pb^qc^r) = a^{x+p}b^{y+q}c^{z+r}$

Hence we get;

$x^{3+(-5)}y^{(-2)+(-5)}z^{1+(-1)}\\\\x^{3-5}y^{-2-5}z^{1-1}\\\\x^{-2}y^{-7}$

Also We know that

$a^{-6} =\frac{1}{a^6}$

So,

$\frac{1}{x^2y^7}$

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3 years ago

Given that

luda_lava [24]

Which diagram ? i cant see any

3 0

3 years ago

Can someone help tell me what this is?

matrenka [14]

Its a ray. The definition of a ray is "A line which starts at a point with given coordinates, and goes off in a particular direction to infinity" A is the point and the arrow shows that it goes until infinity.

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4 years ago