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3 years ago

13

The temperature in Hokkaido in Japan was -8 degrees at 24:00 one night. By 09:00 the temperature had risen 12 degrees. What was

the temperature at 9 am?

1 answer:

likoan [24]3 years ago

5 0

Answer:

4

Step-by-step explanation:

On a number line you will got to -8 and go up 12 and you would get 4

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4 years ago

A parabola has a focus of F(8.5,−4) and a directrix of x=9.5.

HACTEHA [7]

Answer:

$-\frac{1}{2}y^2-4y+1=x$

Step-by-step explanation:

A parabola has a focus of F(8.5,−4) and a directrix of x=9.5.

General form of horizontal parabola is

$(y-k)^2=4p(x-h)$

the distance between directrix and focus is the value of p

so p = 8.5 - 9.5 = -0.5

Focus is (h+p , k), given focus is (8.5, -4)

So k = -4 and h+p = 8.5

we know p = -0.5

h +p = 8.5

h - 0.5 = 8.5

so h= 9 and k = -4

vertex is (h,k) that is (9, -4)

Now plug in the value in the general equation

$(y-k)^2=4p(x-h)$ , k= -4, h= 9 , p = -0.5

$(y+4)^2=4(-0.5)(x-9)$

$(y+4)^2=-2(x-9)$

$y^2+8y+16=-2x+18$

subtract 18 on both sides

$y^2+8y-2=-2x$

Divide whole equation by -2

$-\frac{1}{2}y^2-4y+1=x$

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3 years ago

Which graph shows a function where f(2)=4?

White raven [17]

Answer:

A

Step-by-step explanation:

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3 years ago

Read 2 more answers

Which of these is the algebraic expression for the verbal expression "ten times the difference of a number and twelve?" can some

GenaCL600 [577]

Answer:

10(x - 12)

Step-by-step explanation:

10(x - 12)

10x - 120 Distributive Property

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2 years ago

The width of a rectangle is the length minus 4 units. The area of the rectangle is 12 units. What is the width, in units, of the

marusya05 [52]

Answer:

Step-by-step explanation:12-4=8

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2 years ago