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devlian [24]
3 years ago
10

The temperature for the past 8 hours has been changing at the rate of-1.5 degrees each hour. The meteorologist predicts that the

temperature will continue changing like this for the next 6 hours. The present reading is 0 degrees a. What was the temperature reading 7 hours ago? b. what temperature is predicted for 6 hours from now? c. when was the temperature reading 6 degrees? d. when is the temperature expected to be -8 degrees?
Mathematics
1 answer:
Nuetrik [128]3 years ago
4 0
A. 7 hours ago the temperature was 7 * 1,5 = 10,5 degrees more, so if now it's 0, then it was 10,5 degrees 7 hours ago.

b. in six hours it will be 6 * 1,5 = 9 degrees less, so if it's 0 now, then it will be -9 degrees in 6 hours.

c. the temperature was reading 6 degrees 4 hours ago because:

x * 1.5 = 6           / ÷1.5 (both sides)
x = 4

d. -8 is expected to be in 5 hours and 15 minutes because:

x * 1.5 = 8         / ÷1.5 (both sides)
x = 5 1/3
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I forgot how to divide fractions properly. please send help.
Mamont248 [21]

Answer:

2.5 or 10/4

Step-by-step explanation:

2÷4/5  

Integers can be fractions. Which are just the summation of equal parts. So integers can be written in any fractional form as you like,

2/1÷4/5

But turning your fraction into an integer is not enough to divide, you must first use the reciprocal form of your dividend. and then you multiply to obtain your answer. (The reason is that division is multiplication of the reciprocal)

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1.
Sliva [168]

Answer:

A. vertex, (3, 0); y-intercept 4.5

Step-by-step explanation:

Rewrite in vertex form and use this form to find the vertex  

( h , k ) . ( 3 , 0 )

To find the x-intercept, substitute in  0  for  y  and solve for  x . To find the y-intercept, substitute in  0  for  x  and solve for  y .

x-intercept(s):  

( 3 , 0 )

y-intercept(s):  

( 0 , 4.5 )

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