MATHEMATICS HIGH SCHOOL

Select the direction that this parabola opens.y=-x^2/20

A) up
B) down
C) left
D) right

Answers

Answer 1

Answer:

Answer:

the parabola opens down

Step-by-step explanation:

Select the direction that this parabola opens.

y=-x^2/20

$y=(-x^2)/(20)$

To find the direction of the parabola y=ax^2 +bx+c ,we need to consider the value of 'a'

If 'a' is positive then the parabola opens up

If 'a' is negative then the parabola opens down

from the given equation

$y=(-x^2)/(20)$

The value of a=-1 which is negative

so the parabola opens down

Answer 2

Answer: Hello,
x² 's coefficient is <0 ==> parabola opens down.

Answer B

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Translate the phrase into a math expression.15 divided by a number, then decreased by 2

A.
(15 ÷ n) + 2

B.
(15 ÷ n) – 2

C.
15 ÷ (n – 2)

D.
15 ÷ (n + 2)

Answers

B. (15/n) – 2

Because you have to divide the 15 and the number first then "decrease" it by 2

-3x+4=16
PLEASE SOLVE THIS!!

Answers

-3X+4=16

Subtract 4 from each side.

-3x+4-4=16-4

-3x=12

Divide each side by -3.

x=-4

I hope this helps!

-3x+4=16
Subtract 4 from 16
-3x=12
x= -4 because 3 times 4 =12 yet in order to make a negative number into a positive number, put two negative numbers together, and it's positive.

Compute the amount of interest earned in the following simple interest problem.A deposit of $1,600 at 6% for 180 days:

Answers

with 6% is 1,696. for 180 days, $305,280

I=PRT
I=interest
P=principal
R=rate in decimal
T=time in yaers

365 days per year
t=180/365

given
P=1600
R=6%=0.06
T=180/365

I=1600*0.06*180/365
I=96*180/365
I=47.342

rounds to
Interst=$47.34

On a coordinate plane, the x-axis is labeled Number of sandwiches and the y-axis is labeled Cost in dollars. The points are at (3, 6) and (4, 8).Two equivalent ratios are shown on the graph. How can you plot more equivalent ratios, starting at one of the plotted points?

Select all that apply.
Move up 2 and right 1.
Move up 1 and right 2.
Move up 4 and right 2.
Move down 2 and left 1.
Move down 1 and left 2.

Answers

Answer: aloha mi dfot mvie

Step-by-step explanation:

Which of the following is another way to express the equation 16 = -9 + z?

Answers

Since you didn't give the options, we'll answer In steps and you can pick which step you have as an answer choice...

16 = -9 + z

Add 9 to each side for

16 + 9 = z (that's one option)

Add like terms for

25 = z (there's another)

You could also go a whole different route and take the original equation

16 = -9 + z

subtract z from each side for

16 - z = -9

Any of those would be another way to express the equation.

Answer:

16 = -z - 9

Step-by-step explanation:

umm yeh hope this helps?

Suppose Q and R are independent events. Find P(Q and R) if P(Q) = 0.63 and P(R) = 0.48.0.0945

0.3024

0.15

1.11