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3 years ago

The sum of a number and two is equal to eight

Mathematics

1 answer:

Virty [35]3 years ago

5 0

Answer:

I'm pretty sure if you subtract 2 from eight you will find the answer of 6 i'm not sure if that question was implying this answer but I hope this helps

Step-by-step explanation:

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Rewrite the equation of the parabola in vertex form. y= x2 + 8x - 21

sergey [27]

Answer:

$y=(x+4)^{2}-37$

Step-by-step explanation:

we know that

The equation of a vertical parabola into vertex form is equal to

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

where

(h,k) is the vertex of the parabola

if a> 0 then the parabola open upward (vertex is a minimum)

if a< 0 then the parabola open downward (vertex is a maximum)

In this problem we have

$y=x^{2}+8x-21$

Convert to vertex form

Complete the square

$y+21=x^{2}+8x$

$y+21+16=(x^{2}+8x+16)$

$y+37=(x^{2}+8x+16)$

$y+37=(x+4)^{2}$

$y=(x+4)^{2}-37$ --------> equation in vertex form

The vertex is the point $(-4,-37)$

the parabola open upward (vertex is a minimum)

4 0

3 years ago

Read 2 more answers

Find y. Help me please:))

Lesechka [4]

Answer:

y = 47

Step-by-step explanation:

All of the angles in a triangle must add up to 180. The angle marked 3y can help us find the missing angle of the triangle: 180-3y
Then you can make an equation to help solve for y:
50 + (2y-3) + (180-3y) = 180
Combine like terms:
227-y=180
y = 47

5 0

2 years ago

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Add the integers. -6 + (-4) =( ? B-2 C 2 D 10

lina2011 [118]

Answer:
-6 + -4 = -10

3 0

3 years ago

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Find the volume of this square based pyramid. 5 cm 5 cm 5 cm. Round to the nearest tenth.

vodka [1.7K]

Answer: