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alexdok [17]
3 years ago
8

A car leaves a city with a speed of 90 mph. Three hours later and our of the same city another car in pursuit of the first leave

s with a speed of 120 mph. Find the time it takes the scond car to reach the first.
Mathematics
1 answer:
Hunter-Best [27]3 years ago
7 0
The second car is 30 minutes
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At midnight, the temperature was -8oF. At noon, the temperature was 23oF. Which expression represents the increase in temperatur
irinina [24]

Answer:

23^oF-(-8^oF)

Step-by-step explanation:

We have been given that at midnight, the temperature was -8^oF. At noon, the temperature was 23^oF.

Since our temperature has increased to 23 degree Fahrenheit from -8 degree Fahrenheit, we can represent this increase in temperature as:

\text{The increase in temperature}=23^oF-(-8^oF)

Therefore, the expression 23^oF-(-8^oF) represents the increase in temperature.  

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2 years ago
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Which of the following indicates that the roots of a quadratic are irrational
yan [13]
Answer would be D  You can have a rational discriminant for an irrational root, but you can also have rational discriminant for a rational root. So C is partially correct. 

<span>All prime discriminants will result in an irrational root, but not all irrational roots have prime discriminants </span>
6 0
3 years ago
2 y + 4 x = 8, Solve for y
mash [69]

Answer:

y=−2x+4

Step-by-step:

2y+4x=8

Step 1: Add -4x to both sides.

4x+2y+−4x=8+−4x

2y=−4x+8

Step 2: Divide both sides by 2.

2y /2 = −4x+8 /2

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Jenny is cooking a chicken for dinner. A chicken needs to be cooked for 40 mins per kilogram, plus an extra 20 mins. How long wi
goldenfox [79]

1.679 kg * (40 min)/(kg) + 20 min = 67.16 min + 20 min = 87.16 min

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Which of the following points lies on the circle whose center is at the origin and whose radius is 10?
Elodia [21]

Unfortunately, you haven't shared "the following points."


The equation of a circle centered at the origin and whose radius is 10 is


x^2 + y^2 = 10^2.

8 0
3 years ago
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