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Alex777 [14]
3 years ago
9

A window washer clean 38 windows in two hours at this rate how many windows did he clean seven hours

Mathematics
1 answer:
madreJ [45]3 years ago
3 0

Answer:

133 windows

Step-by-step explanation:

38/2=19 (windows per 1 hour)

19*7=133 windows

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777dan777 [17]
1/100 of a metre, as 100cm make 1m
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3 years ago
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Joe is building a post for his mailbox. To find the correct dimensions, he needs to expand this expression: (x-3) (x-9) (x-4) Se
kolbaska11 [484]

Answer:

(x-3)(x-9)(x-4)=x^3-16x^2+75x-108

Step-by-step explanation:

Given:

The expression to expand is given as:

(x-3)(x-9)(x-4)

Let us expand the first two binomials of the given expression using FOIL method.

The FOIL method states that:

(a + b)(c + d) = ac + ad + bc + bd

(x-3)(x-9)=(x\times x)+(x\times -9)+(-3\times x)+(-3\times -9)\\\\(x-3)(x-9)=x^2-9x-3x+27=x^2-12x+27

Now, let us multiply the result with the remaining binomial. Multiplying each term of the trinomial with each term of the binomial, we get:

(x^2-12x+27)(x-4)\\\\= (x^2\times x)+ (x^2\times -4)+(-12x\times x)+(-12x\times -4)+(27\times x)+(27\times -4)\\\\=x^3-4x^2-12x^2+48x+27x-108\\\\=x^3-16x^2+75x-108...........(\because-12x^2-4x^2=-16x^2,48x+27x=75x)

Therefore, the equivalent expression after expanding is given as:

(x-3)(x-9)(x-4)=x^3-16x^2+75x-108

3 0
3 years ago
A) scrieti toate numerele naturale impare mai mici decat 17
AURORKA [14]

1, 3, 5, 7, 8, 11, 13, 15  is the answer.

5 0
3 years ago
Which inequality is represented by this graph? 0 - 345> x O 0 -34.5 0 -355 cx​
julia-pushkina [17]

Answer:

Step-by-step explanation:

If x is the white dot on the graph:

From what it looks like, x is right between -35 and -34 x (which is -35.5).

If that is the case then none of the answers are correct since -35.5 is <u>equal or less</u> than x. (the sign looks like this:  "\leq" )

But if you have to choose one of the answers then number 4 (-35.5 < x) would be closest.

8 0
3 years ago
Chau made $252 for 18 hours of work. At the same rate, how much would he make for 9 hours of work?
Akimi4 [234]

Answer:

$126

Step-by-step explanation:

$252/$18=$14 dollars per hour.

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7 0
3 years ago
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