4 years ago

URGENT! CINE SE PRICEPE LA MATEMATICĂ. [CLASA A 8-A]

Mathematics

1 answer:

kiruha [24]4 years ago

7 0

The answer is yes but its could be false or 6:00

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hichkok12 [17]

She wrote 12 digits down

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3 years ago

Two sides of a triangle are equal in length. The third side of the triangle is 3 more than the equal sides. If the perimeter of

Inessa [10]

Answer:

Step-by-step explanation:

The two smaller sides are 15 and the larger one is 18

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3 years ago

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Find the missing side!!

shutvik [7]

The answer is 12

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3 years ago

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Graph a parabola whose x-intercepts are at x = -3 and x = 5 and whose minimum value is y = -4.

shtirl [24]

Answer:

(See explanation and attachment below for further details)

Step-by-step explanation:

The parabola must satisfy the following conditions:

$y + 4 = C\cdot (x - k)^{2}$

$y + 4 = C\cdot (x^{2}-2\cdot k \cdot x + k^{2})$

The expression for the x-intercepts are, respectively:

x = -3

$4 = C\cdot [(-3)^{2} - 2\cdot k\cdot (-3)+k^{2}]$

$\frac{4}{C} = 9 + 6\cdot k + k^{2}$

x = 5

$4 = C\cdot [5^{2}-2\cdot k \cdot (5)+k^{2}]$

$\frac{4}{C} = 25 - 10\cdot k + k^{2}$

By equalizing both expressions:

$9 + 6\cdot k + k^{2} = 25 - 10\cdot k + k^{2}$

$16\cdot k = 16$

$k = 1$

And,

$C = \frac{4}{25-10\cdot (1)+1^{2}}$

$C = \frac{1}{4}$

The equation of parabola is:

$y = \frac{1}{4}\cdot (x-1)^{2} - 4$

Whose graph is included as attachment.

5 0

3 years ago

The first term in the sequence is 1, and each other term is 5 more than three times the previous term.

marin [14]

$a_1=1, a_n=a_{n-1}+5$ ( $n>1$ ).

Hope this helps.

6 0

3 years ago