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evablogger [386]
4 years ago
12

Determine the discriminant of x2 = 4.

Mathematics
1 answer:
GalinKa [24]4 years ago
6 0

Answer:

b). 16.

Step-by-step explanation:

x^2 = 4

We can write this as

x^2 + 0x - 4 = 0

The discriminant (b^2 - 4ac) =

0^2 - 4 * 1* -4

= 16.

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Now, that you have the new wheel circumference, what will happen to the number of rotations if the circumference of the tires we
butalik [34]

The number of rotations for the new wheel will be  1,056 rotations

<h3>How to calculate the circumference of a wheel?</h3>

Let the initial circumference be 50 rotations  (assumed)

If the number of rotations of the circumference of the tires were increased by 20%, then the new circumference will be:

Ne circumference = 1.2 * 50 = 60

number of rotations for the new wheel = 63360/60
number of rotations for the new wheel = 1,056 rotations

Hence the number of rotations for the new wheel will be  1,056 rotations

Learn more on circumference here: brainly.com/question/20489969

7 0
2 years ago
6. Ed bought a coat that usually costs $150. He purchased the coat at a 20% DISCOUNT. How much did Ed
SVEN [57.7K]

Answer:

6. c. 120

7. $6.45

Step-by-step explanation:

1. 150 x 0.20 = 30

2. 150- 30= 120

1. 43 x 0.15= 6.45

5 0
3 years ago
a triangle with a base length (b) of 24 feet had an ares of 252 square feet. what is the height (h) of the triangle? (A=1/2bh)
agasfer [191]

Answer:

21

Step-by-step explanation:

A=1/2bh

252=1/2(24)(h)

multiply 1/2 and 24

252=12(h)

divide ( 252/12 12/12)

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5 0
4 years ago
Read 2 more answers
What probability expression is equivalent to P( / z / &gt; 1.96)?
Sonbull [250]

Answer:

Please check the explanation.

Step-by-step explanation:

Given

P(Z > 1.96)

To determine

What probability expression is equivalent to P(Z > 1.96)

Suppose Z is a standard normal variable.

Therefore,

P(Z > 1.96) = 1 - P(Z ≤ 1.96)

solving

                 = 1 - Ф(1.96)

                 = 1 - 0.9750

                 = 0.0250

6 0
3 years ago
If a hose waters 5/7 of a lawn in 2 hours, how much time will it take to water the entire lawn?
zavuch27 [327]

Answer:

168

Step-by-step explanation:

2x60=120

120/5=24

24x7=

4 0
3 years ago
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