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stiks02 [169]
3 years ago
9

Look at picture please help in less than 5 min

Mathematics
1 answer:
tiny-mole [99]3 years ago
7 0
The answer is b
2^2*3*7=
4*3*7=
12*7=
84
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PLs help 50 PTS!!!!! PLEASE ILL GIVE BRAINLIEST!!!!!
Nookie1986 [14]

Answer:

\large\boxed{y=\dfrac{1}{4}x^2-x-4}

Step-by-step explanation:

The equation of a parabola in vertex form:

y=a(x-h)^2+k

<em>(h, k)</em><em> - vertex</em>

The focus is

\left(h,\ k+\dfrac{1}{4a}\right)

We have the vertex (2, -5) and the focus (2, -4).

Calculate the value of <em>a</em> using k+\dfrac{1}{4a}

<em>k = -5</em>

-5+\dfrac{1}{4a}=-4        <em>add 5 to both sides</em>

\dfrac{1}{4a}=1           <em>multiply both sides by 4</em>

4\!\!\!\!\diagup^1\cdot\dfrac{1}{4\!\!\!\!\diagup_1a}=4

\dfrac{1}{a}=4\to a=\dfrac{1}{4}

Substitute

a=\dfrac{1}{4},\ h=2,\ k=-5

to the vertex form of an equation of a parabola:

y=\dfrac{1}{4}(x-2)^2-5

The standard form:

y=ax^2+bx+c

Convert using

(a-b)^2=a^2-2ab+b^2

y=\dfrac{1}{4}(x^2-2(x)(2)+2^2)-5\\\\y=\dfrac{1}{4}(x^2-4x+4)-5

<em>use the distributive property: a(b+c)=ab+ac</em>

y=\left(\dfrac{1}{4}\right)(x^2)+\left(\dfrac{1}{4}\right)(-4x)+\left(\dfrac{1}{4}\right)(4)-5\\\\y=\dfrac{1}{4}x^2-x+1-5\\\\y=\dfrac{1}{4}x^2-x-4

3 0
3 years ago
2. Multiply and simplify: (x - 2)(2x + 3)<br> Answer
inysia [295]

Step-by-step explanation:

(x - 2)(2x + 3)

=2x²+3x-4x-6

=2x²-x-6

8 0
3 years ago
Read 2 more answers
Write two equivalent expressions that represent the rectangular array below.
Ainat [17]
Area formula for rectangles: L x W

Answer: 3 x 2a + 3 x 5 = 3 x 2a x 5

You know that the expressions are equivalent, because when you solve for a you get a = 5/8 or 0.625
3 0
3 years ago
The answer . What is the equation and the answer ?
Ksenya-84 [330]
The answer is a  8 days. the equation say's at the beginning of the day he read's 50 page's and later read's 14. this is everyday so. add 50+14+64. divide 400 by 64 and you get  7.8125, round that up and you get 8<span />
4 0
3 years ago
Find the volume of the cone use pi=3.14 Round to the nearest hundredth?
xenn [34]

Answer:

Volume=2616.67

Step-by-step explanation:

V=1/3pi r squared height

V=1/3(3.14)(10)squ.(25)

V=1/3(3.14)(100)(25)

V=2616.66667

V=2616.67

6 0
3 years ago
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