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Rudiy27
3 years ago
11

One winter night the temperature fell 15 degrees between midnight and 5 am. By 9 am, the temperature had doubled from what it wa

s at 5 am. By noon, it had risen another 10 degrees to 32 degrees. What was the temperature at midnight?
Mathematics
2 answers:
kvv77 [185]3 years ago
6 0

Answer:

123

Step-by-step explanation:

saveliy_v [14]3 years ago
5 0

Answer:26

Step-by-step explanation:starting from 32

32-10=22 22/2=11 11+15=26

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Solve for x<br> 2(4x-3)-8=4+2 x ; x = 3?
frozen [14]

Answer:

x=3

Step-by-step explanation:

7 0
3 years ago
You ask four people to the prom. If X is the number of "yes" responses, what is E(X)? Assume equal probability for
VladimirAG [237]

Answer:

e is the amount of people

Step-by-step explanation:

4 x so let’s say you have two x you have 50% of the people that said yes.

6 0
2 years ago
HELP PLEASE!!!! I NEED HELP WITH GEOMETRY!!!
lesya692 [45]

Step-by-step explanation:

m < QRS = m < URS + m < QRU

30x - 4 = 60° + 15x - 4

15x = 60°

X = 4°

<u>m < QRS</u> = 30 * 4 - 4 = <u>116°</u>

8 0
2 years ago
Window design. A triangular window on Ross camp's new scary boat has two sides that measure 87 centimeters 64 centimeter, respec
krek1111 [17]
Since the perimeter must not exceed 291.
Let the third side be x.

x + 87 + 64  < 291
x + 151 < 291.
x            < 291 -151.
x   <  140.      (First)

But for a triangle there is what is called the Triangle Inequality Theorem.  That given  the two sides of a tringle, the third side of the triangle must greater than the positive difference between the two sides and less than the sum of the two sides.

So for this case.   87 and 64.

x  > ( 87 - 64).    x  > 23.
x < (87 + 64)      x  <  151. Combine both inequalities.

       23  < x < 151  (second).

Combining First and second. Both must be satisfied.
So we have  a more accurate answer as:


23 < x < 140.      x is greater than 23 and x is less than 140.

x  could be    24, 25, 26, 27, ......, 139.  cm.

I hope this helps.
3 0
3 years ago
Read 2 more answers
In a grade seven class, 18 students have pets, and 12 do not. What percent of the class has a pet?
Svetradugi [14.3K]
Answer :
If 18+12 is 30 and only 18 of them has pets then 70 percent have pets
7 0
3 years ago
Read 2 more answers
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