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Virty [35]
3 years ago
13

If a=-1,b=-6 and c=2 then what is the value of b2-4ac?​

Mathematics
1 answer:
grandymaker [24]3 years ago
4 0

Answer:

-4

Step-by-step explanation:

(-6)(2)-4(-1)(2)

(-12)-(-8)

-12+8=-4

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A basketball is shaped like a sphere as shown in the diagram. The basketball has a radius of 4.7 inches.
VMariaS [17]

Answer:

434.9

Step-by-step explanation:

The circumference is 29.53.

Hope that this helps!

7 0
2 years ago
The average customer waiting time at a fast food restaurant has been 7.5 minutes. The customer waiting time has a normal distrib
tatuchka [14]

Answer: C . H_0:\mu\geq7.5 and H_a:\mu

Step-by-step explanation:

Definition:

Null hypothesis(H_0) is a statement about the population parameter according to the objective raised by the researcher . It contains '=' , '≤' and  '≥' signs.

Alternative hypothesis(H_a) is also a statement about the population parameter but against null hypothesis  . It contains '≠' , '<' and  '>' signs.

Let \mu be the average customer waiting time for the population.

Given : The average customer waiting time at a fast food restaurant has been 7.5 minutes.

Objective of test : After using new system ,  the average customer waiting time is at least 7.5 or less than 7.5.

Then, the null and alternative hypothesis for this scenario will be :

H_0:\mu\geq7.5

H_a:\mu

4 0
3 years ago
The positions of two villages A and B. Village B is 100km away and on a bearing of 083° from village A.
blagie [28]

Answer:

23•1

Step-by-step explanation:

83°/360°×100km=23•1

7 0
3 years ago
On a single roll of a pair of dice, what are the odds against rolling a sum of 7? Please help ASAP!!! :(
Kobotan [32]
Honestly I don’t remember how to do this but u can try .083 but don’t count on it
7 0
2 years ago
a 175cm tall student casts a shadow that is 2.3cm long. at the same time, a tree casts a shadow that is 8.2m longest
Anika [276]

Ok so I’m assuming the question is how the tall is we need to find the Angle of the sun so

Student : 175

Shadow: 2.3

Hypotenuse: 175.0151136

Using -cos(175/175.0151136) we find the

Suns angle: .753 Above him/her

Our tree’s shadow:8.2

Using the suns angle we use cos(x

8 0
3 years ago
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