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Thepotemich [5.8K]
3 years ago
14

At 5 a.m., the temperature at an airport was −9.4°F . Six hours later, the temperature was 2.8°F . Which expression represents t

he total temperature change over the six hours?
Mathematics
2 answers:
RoseWind [281]3 years ago
4 0
Let x = the number of hours since 5 a.m.
Let y = temperature, °F

Let the total temperature change be modeled by the expression
y =  ax + b

At 5 a.m., x = 0 and y = -9.4°F. Therefore
b = -9.4

When x = 6 hours, y = 2.8°F. Therefore
6a + b = 2.8
6a - 9.4 = 2.8
6a = 12.2
a = 2.0333

The expression is
y = 2.0333x - 9.4

Answer:
y = 2.0333x - 9.4
where
x = hours since 5 a.m.
y = temperature, °F
vredina [299]3 years ago
3 0

Answer:

|2.8 - (-9.4)|

Step-by-step explanation:

The correct answer is |2.8 - (-9.4)|.

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Macy bought a total of 12 fiction and non-fiction books. The fiction books cost $12 each and the
Masja [62]

Answer:

fiction books = 4

non fiction books = 8

non fiction books are twice fiction books.

Step-by-step explanation:

let number of fiction books be X so

non fiction books will be 12-X

12X + 25(12-X) = 248

12X -25X = -53

X = 4( fiction books)

12-4 = 8 (non fiction)

4 0
2 years ago
WHATS THE ANSWER ???? HELPPPO
stepladder [879]

Answer:

∠6 and ∠4

Explanation:

Exterior angles tend to be outside the polygon. The ones inside like ∠1, ∠5, and ∠3 are called interior because they are inside the polygon.

∠2 is invalid because it isn't really an angle, it's a side.

6 0
3 years ago
A triangle has one angle that measures 70 degrees, one angle that measures 42 degrees, and one angle that measures 68 degrees. W
Leto [7]

Answer:

Scalene Acute Triangle

Step-by-step explanation:

The triangle above is an <em>"acute triangle"</em> because the measurement of each angle is <em>less than 90°</em>. However, there are three types of acute triangle and these are: <em>Equilateral Acute Triangle, Isosceles Acute Triangle and Scalene Acute Triangle.</em>

When all the angles have the same measurement of less than 90°, then it is an Equilateral Acute Triangle. If only two angles have the same measurement, it is an Isosceles Acute Triangle. If <u><em>none of the angles are the same </em></u>but all are less than 90°, which also means that the<u><em> sides are also unequal</em></u>, then it is an Scalene Acute Triangle.

The triangle above has <em>different angle measurements of less than 90°</em>. Therefore, it is an Scalene Acute Triangle.

6 0
3 years ago
PLEASE HELP!
rusak2 [61]
A.) 0.35x + 42 ≤ 70

She wants the truck for one day, which will cost $45. We don't know how far the truck is traveling so that is the variable. She cannot spend more than $70, since that is her budget.

b.) Solve for x using the above equation:

0.35x + 42 ≤ 70
0.35x ≤ 28
x ≤ 80

Judy can drive 80 miles
4 0
3 years ago
If 48% of a number, n, is 40.32, what is 20% of n?
jok3333 [9.3K]

Answer:

Step-by-step explanation:

48% of n = 0.48n = 40.32

n = 84

20% of n = 0.20*84 = 16.8

7 0
3 years ago
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