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3 years ago

What value of a would make the graph of f(x)= ax2 open up? A. -8 B. 0 C. 10 D. -21

Mathematics

2 answers:

Dmitrij [34]3 years ago

7 0

Answer:

ç I see some of ask you to do it

umka21 [38]3 years ago

4 0

Answer:

The equation is unsolvable when the 'a' variable is in it, so if we take it out, then all of them would make the equation open up.

Sorry for not giving a definite answer, but that is what I got.

Hope that this helps!

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You order fourteen burritos to go from a Mexican restaurant, six with hot peppers and eight without. However, the restaurant for

Genrish500 [490]

Answer:

0.578

Step-by-step explanation:

If you pick three burritos at random, find the probability of the given event. (Round your answer to three decimal places.)

Given that there are 14 orders at the ratio by of:

6 with hot peppers

8 without hot peppers

At most two have hot peppers.

Binomial Problem with n = 3 ; p(hot) = 6/8

P(0<= x <=2) = 1 - P(x = 3)

= 1 - (6/8)^3

= 1 - ( 3/4 )^3

= 1 - ( 27/64 )^3

= 1- (37/64)

= 1 - 0.421875

= 0.578125

= 0.578

6 0

3 years ago

If a drink costs 2.32, how many drinks can you buy with 13 dollars?

Llana [10]

Answer:

5 drinks

Step-by-step explanation:

If the drinks cost $2.32 and you have $13 you can divide 13 by 2.32

13/2.32+ 5.6034...

You cannot buy a partal drink so you look at only the whole number which is 5.

6 0

3 years ago

Read 2 more answers

A rectangular vegetable farm measures 45 m by 15 m. It has also a path of 1m wide. What is the area of the path?

Rina8888 [55]

Answer:

hope it will help you!!!!!!

6 0

3 years ago

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Is the point (2, 2 1/2) on the graph of y=x+2? How do you know?

Ksenya-84 [330]

Answer:

No, it is not on the graph.

Step-by-step explanation:

Plug in (2, 2 $\frac{1}{2}$ ) to y = x + 2

(2 $\frac{1}{2}$ ) = (2) + 2

$2\frac{1}{2} \neq 4$

6 0

3 years ago

In May you used 900 kilowatt-hours of energy for electricity.

Sloan [31]

Answer:

a) "The total electrical energy use was 3,240,000,000 joules."

b) "The average power use is 1210 watts."

Part 1: "To generate the electricity you used, 810 L is needed."

Part 2: "To generate the electricity you used, 214.00 gal is needed."

Step-by-step explanation:

1 kilowatt-hours = $3.6x10^6$ joules

Converting 900 kilowatt-hours to joules, we have:

$900*(3.6*10^6)=3.24*10^9$ joules, or

Total Electrical Energy use = 3,240,000,000 joules

"The total electrical energy use was 3,240,000,000 joules."

The month of May has 31 days and 1 day is 24 hours. So May has:

31*24=744 hours

Now, we divide 900 kW-hr by the number of hours in the month (744 hrs) to get average power use:

$\frac{900}{744}=1.21$ kW. Since 1000 Watts = 1 kW, we multiply this by 1000 to get the answer in Watts:

1.21 * 1000 = 1210 Watts

"The average power use is 1210 watts."

Part 1:

The conversion efficiency of most generating stations is 33%. So we need to multiply the total electrical energy use (in joules) by a factor of 3 to get the amount of joules required. So:

(3.24 * 10^9)*3 = 9.72 * 10^9 joules

We divide this by 12 million joules to get the number of liters:

$\frac{9.72*10^9}{12*10^6}=810$

So, 810 liters is needed

"To generate the electricity you used, 810 L is needed."

Part 2:

We know that 0.2642 gallons is equal to 1 liters. To get the number of gallons needed, we multiply 810 by 0.2642. So:

810 * 0.2642 = 214.00 gallons

"To generate the electricity you used, 214.00 gal is needed."

7 0

3 years ago