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2 years ago

What is 185% of 13. Please help me

Mathematics

2 answers:

Setler79 [48]2 years ago

8 0

Answer: 24.05

Multiply: 185% × 13 = 24.05

When finding the percent of the number, multiply the percent by the number.

madreJ [45]2 years ago

8 0

Answer:

24.05

Step-by-step explanation:

There are two ways to do this

With a calculator and Without a Calculator

With a Calculator

Input 13 and multiply it by 1.85 to get

24.05

Without a Calculator

Divide 13 by 10 to get

1.3

Then multiply it by 18.5

to get

24.05

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GuDViN [60]

Answer:

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Step-by-step explanation:

Given:

y-intercept of parabola: -4
parabola passes through points: (-2, 8) and (1, -1)

Vertex form of a parabola: $y=a(x-h)^2+k$

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Substitute point (0, -4) into the equation:

$\begin{aligned}\textsf{At}\:(0,-4) \implies a(0-h)^2+k &=-4\\ah^2+k &=-4\end{aligned}$

Substitute point (-2, 8) and $ah^2+k=-4$ into the equation:

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Substitute point (1, -1) and $ah^2+k=-4$ into the equation:

$\begin{aligned}\textsf{At}\:(1.-1) \implies a(1-h)^2+k &=-1\\a(1-2h+h^2)+k &=-1\\a-2ah+ah^2+k &=-1\\\implies a-2ah-4&=-1\\a(1-2h)&=3\end{aligned}$

Equate to find h:

$\begin{aligned}\implies a(1+h) &=a(1-2h)\\1+h &=1-2h\\3h &=0\\h &=0\end{aligned}$

Substitute found value of h into one of the equations to find a:

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Substitute found values of h and a to find k:

$\begin{aligned}\implies ah^2+k&=-4\\(3)(0)^2+k &=-4\\k &=-4\end{aligned}$

Therefore, the equation of the parabola in vertex form is:

$\implies y=3(x-0)^2-4=3x^2-4$

So the vertex of the parabola is (0, -4)

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