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goldenfox [79]
2 years ago
7

Una escalera se apoya en una pared con un ángulo de 40º. Si se apoyase con un ángulo de 55º, se conseguiría una altura 35 cm may

or. Calcula la longitud de la escalera
Mathematics
1 answer:
sdas [7]2 years ago
3 0

Answer: L ≈ 2.0 m

Step-by-step explanation:

Lsin40 = h

Lsin55 = h + 0.35

Lsin55 = Lsin40 + 0.35

Lsin55 - Lsin40 = 0.35

L(sin55 - sin40) = 0.35

L = 0.35 / (sin55 - sin40)

L = 1.98452 ≈ 2.0 m

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John has a rectangular-shaped field whose length is 62.5 yards and width is 45.3 yards. The area of the field is ________ square
oee [108]
Area = 2831.25 square yards

Perimeter =215.6 yards

EXPLANATION

The area and perimeter of a rectangular field are found using the formula for finding the area and perimeter of a rectangle respectively.

That means, area of the rectangular field is given by the formula,

A= l\times w

We just have to substitute
l=62.5 and w= 45.3 into the given formula and evaluate.

This implies that;

A= 62.5\times 45.3

This gives the area of the rectangular-shaped field to be;

A= 2831.25 square yards.

Now for the perimeter, we use the formula

P=2w +2l

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P=2(w +l)

Substituting the values for the length and width gives,

P=2(62.5+45.3)

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\Rightarrow P=215.6

Hence the perimeter of the rectangular shaped field is 215.6 yards.
8 0
3 years ago
This lesson is almost ⅔ over. Express this number as a decimal.
MissTica

Answer:

0.66666667

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
Which system is equivalent y=-2x^2 y=x-2
german
The wording of your question suggests that there were answer choices.  Mind sharing them?

The system   <span>y=-2x^2 y=x-2 would be best written as:

</span><span>y=-2x^2 
y=x-2                  If you subst. x-2 for y in the first equation, you'll get:
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irina [24]

Answer:

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Step-by-step explanation:

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In addition, we suppose that variable cost is directly proportional to the number of days that Kirstin owns her dog. That is:

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r - Daily feeding costs, measured in US dollars per day.

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3 years ago
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The expression is
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and the simplified form is
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