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Kitty [74]
3 years ago
10

n the evening, the temperature is 9 degrees. By midnight it has dropped 1515 degrees lower. Between midnight and 4 am, it goes d

own 3 more degrees. Then, by 9 am, the temperature goes up 10 degrees.
Mathematics
1 answer:
serious [3.7K]3 years ago
6 0

Answer:

1 at 9 am

Step-by-step explanation:

Say 9 PM       the temperature is 9

Midnight                                      -15

4 am                                             -3

9am                                              10

So the result is 9 - 15 - 3 + 10

19 - 18

Result = 1 degree. You really don't have a question, so I'm guessing at what it is.

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dezoksy [38]
3y+x=12 in slope intercept form is y=-1/3+4
5 0
3 years ago
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What two numbers multiply by 25 but adds up to 6
Natalka [10]
No two <em>intergers</em> can solve this problem. If you're not in Algebra II yet, the answer is probably "none."

Just look at the factor pairs of 25:
1 × 25
-1 × 25
5 × 5
-5 × -5
Clearly none of those can add up to 6.

If you want the more complex answer, I'll show you how here. If you don't understand why it doesn't work, that's okay. I just want you to see that  there's not an actual answer to the problem.

a+b = 6
a = 6-b
ab = 25
(6-b)b = 25
6b -b² = 25
-b² + 6b = 25
b² -6b = -25
Factor by splitting the middle.
Half of -6 is -3, (-3)² = 9. Add this to each side.
b² -6b + 9 = -16
Factor the perfect square trinomial.
(b-3)² = -16
Take the square root of each side.
b-3 = 4i
b = 3+4i
a+b = 6
a+3+4i = 6
a= 3-4i
<em>(The "i" stands for an imaginary number, specifically, the square root of -1.)</em>
8 0
3 years ago
What is the solution of this system of linear equations? 3y = x + 6 y – x = 3
Greeley [361]
Hello :
<span>3y = x + 6 ...(1)
y – x = 3...(2)
by (2) : y = x+3...(*)
subsct in (1) :
3(x+3) = x+6
3x-x= -9+6
2x= -3
x=-3/2
subsct in (*) : y =-3/2 +3 =3/2</span>
3 0
4 years ago
Read 2 more answers
It cost 2.10 for a gourmet coffee shop to make a small latte.The price of a small latte is 2.94.What is the percent markup on th
lozanna [386]

Answer:

40%

Step-by-step explanation:

Given that :

Cost of production of small latte = 2.10

Sale price of small latte = 2.94

The Markup = Sale price of small latte - cost of production of small latte

The Markup = 2.94 - 2.10 = 0.84

Percentage Markup = (0.84 / 2.10) * 100%

Percentage Markup = 0.4 * 100% = 40%

5 0
3 years ago
Let X denote the life of a semiconductor laser (in hours) with the following probabilities: P(X ≤ 5000) = 0.05 and P(X &gt; 7000
Anna [14]

Answer:

a) P [ x ≤ 7000] is 0.55

b) P [ x > 5000 ] = 0.95

c)  P [ 5000 < x ≤ 7000 ] = 0,5

Step-by-step explanation:

a)  P [ x > 7000 ]  =  0.45   straightforward    P [ x ≤ 7000] is 0.55

The whole spectrum of probabilities is 1 which in this particular case is divided in two parts having 7000 as a limit, then we subtact 1 - 0.45

b) P [ x ≤ 5000]  = 0.05   again we get P [ x > 5000] taking 1-0.05 to get

P [ x > 5000 ] = 0.95

c) P [ 5000 < x ≤ 7000 ]

Under Normal curve distribution the probability of  x ≤ 7000 includes values   smallers  ( to the left of 5000) so we subtract from 0.55 - 0.05 = 0.50

c) P [ 5000 < x ≤ 7000 ] = 0,5

6 0
3 years ago
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