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Rasek [7]
2 years ago
15

Please help with this algebra ii question

Mathematics
2 answers:
algol132 years ago
5 0
B


Mark brainliest please


Hope this helps you
Veronika [31]2 years ago
4 0

Answer:

Second Choice

Step-by-step explanation:

The vertex form can be expressed as:

\displaystyle \large{f(x) = a {(x - h)}^{2}  + k}

We know that the vertex is (h,k) which we are given (-3,-1). Substitute h = -3 and k = -1 in:

\displaystyle \large{f(x) = a {(x - ( - 3))}^{2}   - 1} \\  \displaystyle \large{f(x) = a {(x  + 3)}^{2}   - 1}

Now we know that the parabola passes through (-2,1). Substitute x = -2 and f(x) = 1 then solve for a.

\displaystyle \large{1= a {( - 2 + 3)}^{2}   - 1} \\   \displaystyle \large{1= a {(1)}^{2}   - 1} \\  \displaystyle \large{1= a - 1}  \\   \displaystyle \large{1 + 1= a } \\   \displaystyle \large{2 = a}

Therefore a = 2.

Hence:-

\displaystyle \large{f(x) = 2{(x  + 3)}^{2}   - 1}

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Answer:

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Answer:

In a rhombus, the diagonals bisect at right angles. That means half the diagonals form a right angle triangle then we can try the Pythagorean theorem. so -

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ElenaW [278]

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Step-by-step explanation:

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alekssr [168]
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Westkost [7]

Answer:

The answer is 7/24.

Step-by-step explanation:

I attached a picture, but I'll try to walk through it here.

1) A negative and a negative makes a positive, so h becomes positive.

2) I added 7/8 to both sides, in order to "isolate the variable", which simply means to get h by itself, on one side of the equation (you'll likely hear it said both ways).

3) I multiplied 7/8 by 3/3, and multiplied -7/12 by 2/2. This is known as a common denominator, which in this case is 24. You can only add and subtract fractions that have a common denominator.

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You can confirm the answer by substituting, or "plugging" 7/24 into your original equation, in place of h.

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