Question

1)9/25*6,25 2)42х^2*у^6/63х^4*у^6 3)Сырок стоит 40 коп. какое наибольшее число Сырков можно купить на 80 руб. 4)а-8/5-а - 3/а-5 5)а(а-4)-(а-2) 6)В треугольнике КМТ угол Т=90 Км=13 см,КТ=5см МТ-? 7)МНКР-Параллелограмм найдите длину МК если периметр параллелограмма равен 62 а периметр треугольника МНК равен 44 см 8) В равнобедренной трапеции М Н К Р-высота,М Р 10 НК 8 найдите М Е

Answer 1

Ответ:

не знаю

Объяснение:

попробуй в учебнике найти

Answer 2

1) 9/25 * 6.25

To calculate 9/25 * 6.25, you can multiply the two numbers together:

9/25 * 6.25 = 0.36

Therefore, the result is 0.36.

2) 42x^2 * y^6 / 63x^4 * y^6

To simplify the expression 42x^2 * y^6 / 63x^4 * y^6, you can cancel out common factors in the numerator and denominator:

42x^2 * y^6 / 63x^4 * y^6 = (42/63) * (x^2/x^4) * (y^6/y^6)

Simplifying further:

(42/63) * (1/x^2) * (1/1) = (2/3) * (1/x^2) = 2/(3x^2)

Therefore, the simplified expression is 2/(3x^2).

3) Сырок стоит 40 коп. Какое наибольшее число Сырков можно купить на 80 руб.?

To find the maximum number of "Сырок" (a type of product) that can be bought for 80 rubles, we need to divide the total amount of money by the cost of each "Сырок".

Given that each "Сырок" costs 40 kopeks, we need to convert 80 rubles to kopeks:

80 rubles = 80 * 100 kopeks = 8000 kopeks

Now, we can divide the total amount of money by the cost of each "Сырок":

8000 kopeks / 40 kopeks = 200

Therefore, the maximum number of "Сырков" that can be bought for 80 rubles is 200.

4) a - 8/5 - a + 3/a - 5

To simplify the expression a - 8/5 - a + 3/a - 5, we can combine like terms:

a - a - 8/5 + 3/a - 5 = -8/5 + 3/a - 5

Therefore, the simplified expression is -8/5 + 3/a - 5.

5) a(a - 4) - (a - 2)

To simplify the expression a(a - 4) - (a - 2), we can expand the brackets and combine like terms:

a(a - 4) - (a - 2) = a^2 - 4a - a + 2

Combining like terms:

a^2 - 5a + 2

Therefore, the simplified expression is a^2 - 5a + 2.

6) В треугольнике КМТ угол Т=90, Км=13 см, КТ=5 см. Найдите МТ.

In triangle KMT, where angle T is 90 degrees, KM is 13 cm, and KT is 5 cm, we can use the Pythagorean theorem to find MT.

The Pythagorean theorem states that in a right triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the other two sides.

So, we have:

MT^2 = KM^2 - KT^2 MT^2 = 13^2 - 5^2 MT^2 = 169 - 25 MT^2 = 144

Taking the square root of both sides:

MT = √144 MT = 12 cm

Therefore, the length of MT is 12 cm.

7) МНКР - Параллелограмм. Найдите длину МК, если периметр параллелограмма равен 62, а периметр треугольника МНК равен 44 см.

In the parallelogram MNKR, if the perimeter of the parallelogram is 62 and the perimeter of triangle MNK is 44 cm, we can find the length of MK.

The perimeter of a parallelogram is equal to the sum of all its sides. Since opposite sides of a parallelogram are equal in length, we can divide the perimeter by 2 to find the length of one side.

So, the length of one side of the parallelogram is 62/2 = 31 cm.

Since MK is one of the sides of the parallelogram, the length of MK is also 31 cm.

Therefore, the length of MK is 31 cm.

8) В равнобедренной трапеции МНКР - высота, МР = 10, НК = 8. Найдите МЕ.

In the isosceles trapezoid MNKR, where MN is parallel to KR and MK is the height, if MR = 10 and NK = 8, we can find ME.

In an isosceles trapezoid, the diagonals (MK and NR) are equal in length.

So, ME = NR.

Since MR = 10 and NK = 8, the length of NR is the sum of these two sides:

NR = MR + NK = 10 + 8 = 18

Therefore, the length of ME is 18.