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3 years ago

14

At 3:00 pm the temperature in Pittsburgh was 93 degrees Fahrenheit decreased at a rate of 2 degrees Fahrenheit every 30 minutes.

What was the temperature at 7:30 pm?

1 answer:

elixir [45]3 years ago

3 0

The answer is 76 degrees

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The question is in the picture. The answer is 14 but I don't know how to get that.

andrezito [222]

Let's convert the problem into Arithmetic progression:
It would be: 5, 9, 13, ....

Here, a = 5, d = 9 - 5 = 4
We know, S(n) = n/2 [ 2a + (n-1)d ]

Substitute the known values,
434 = n/2 [ 2(5) + (n - 1)4 ]
434 * 2 = n [ 10 + 4n - 4 ]
868 = 10n + 4n² - 4n
= 4n² + 6n - 868 = 0

d = b² - 4ac
d = 6² - 4(4)(-868)
d = 36+13888
d = 13924

Now, roots = -b +- √d / 2a
= (-6 + √13924) / 2(4) OR (-6 - √13924) / 2(4)
= (-6 + 118) / 8 OR (-6 - 118) / 8
= 112/8 OR -124/8
= 14 OR -15.5

As number of sticks can't be in negative/decimal or fraction form, -15.5 would be fully rejected.

In short, Your Answer would be 14 [ Remaining root ]

Hope this helps!

7 0

3 years ago

Read 2 more answers

Which is a factor of each term of the polynomial? <br><br> (3d2 – 10d)

Marysya12 [62]

The only factor that both terms have is d

4 0

3 years ago

Solve for the value of x.

shutvik [7]

Answer:

Step-by-step explanation:

Both angles are supplementary (they add up to 180°)

This means that (10x) + (6x - 12°) = 180°

(10x) + (6x - 12°) = 180°

10x + 6x - 12° = 180°

16x - 12° = 180°

16x = 192°

x = 12°

Hope this helps!

4 0

3 years ago

Which of the following described (5+5) in the expression above?

Y_Kistochka [10]

Answer:

10

Step-by-step explanation:

its 5+5

8 0

4 years ago

Anton [14]

Answer:

176 square yards

Step-by-step explanation:

<u><em>The picture of the question in the attached figure N 1</em></u>

we know that

The area of the walkway around the rectangular pool, is equal to the area of two trapezoids (#1 and #2), plus the area of two smaller rectangles (#3 and #4)

see the attached figure N 2 to better understand the problem

step 1

Find the area of the two trapezoids (#1 and #2)

$A=2[\frac{1}{2}(b_1+b_2)h]$

simplify

$A=(b_1+b_2)h$

we have

$b_1=12\ yd\\b_2=4+12+4=20\ yd\\h=4\ yd$

substitute

$A=(12+20)(4)=128\ yd^2$

step 2

Find the area of the two smaller rectangles (#3 and #4)

$A=2[LW]$

we have

$L=4\ yd\\W=6\ yd$

substitute

$A=2[(4)(6)]=48\ yd^2$

step 3

Find the area of the walkway around the rectangular pool

$128+48=176\ yd^2$

8 0

4 years ago

Read 2 more answers