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Ksju [112]
3 years ago
5

At midnight the temperature is -6 degrees Celsius. By midday the temperature is 9c. By how much did the temperature rise?

Mathematics
1 answer:
antiseptic1488 [7]3 years ago
6 0

Answer:

I think it rose by 15 degrees

Step-by-step explanation:

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EFV and EDW are straight lines.<br>Find the value of x and of y.​
Makovka662 [10]

Answers:

x = 72

y = 83

============================================================

Explanation:

Angle VFG is 50 degrees. The angle adjacent to this is angle EFG which is 180-50 = 130 degrees.

Angle HDW is 77 degrees. The supplementary angle adjacent to this is 180-77 = 103 degrees which is angle EDH.

Pentagon EFGHD has the following five interior angles

  • E = x
  • F = 130
  • G = 170
  • H = 65
  • D = 103

Note that angles F = 130 and D = 103 were angles EFG and EDH we calculated earlier.

For any pentagon, the interior angles always add to 180(n-2) = 180(5-2) = 180*3 = 540 degrees.

This means,

E+F+G+H+D = 540

x+130+170+65+103 = 540

x+468 = 540

x = 72

---------------------------------------

Now focus your attention on triangle THS

We see that the interior angles are

  • T = y
  • H = 65
  • S = 32

The angle H is 65 degrees because it's paired with the other 65 degree angle shown. They are vertical angles.

For any triangle, the angles always add to 180

T+H+S = 180

y+65+32 = 180

y+97 = 180

y = 180-97

y = 83

7 0
3 years ago
Solve the quadratic equation by completing the square. x2 + 6x + 7 = 0
ruslelena [56]
Hello,

x²+2*3x+3²+7-9=0
==>(x+3)²-2=0
==>(x+3-√2)(x+3+√2)=0
==> x=-3+√2 or x=-3-√2
7 0
3 years ago
Which statement is always true? A.) The absolute value of an integer is equal to the opposite of the integer B.) a positive inte
Ahat [919]

Answer:

the absolute value of an integer is equation to the opposite of the integer

3 0
3 years ago
Read 2 more answers
A supervisor finds the mean number of miles that the employees in a department live from work. He finds x=29 and s=3.6 . Which s
qwelly [4]

Answer:

Option 3 is right

z37 is between 2 and 3 standard deviations of the mean.

Step-by-step explanation:

Let X be a random variable which represents the mean number of miles that the employees in a department live from work

X is normal (N(29,3.6)

WE have to find Z score for X

Z =\frac{x-29}{3.6}

=2.22

i.e. 37 is 2.22 std deviations from the mean.

In other words, z37 is between 2 and 3 standard deviations of the mean.

3 0
3 years ago
|3O+(-17)| I REALLY NEED TO KNOW PLZZZZZ
Soloha48 [4]

✽ - - - - - - - - - - - - - - - ~Hello There!~ - - - - - - - - - - - - - - - ✽

➷ 30 + 17

➷ 30 + -17

➷ = 13

✽

➶ Hope This Helps You!

➶ Good Luck (:

➶ Have A Great Day ^-^

↬ May ♡

4 0
4 years ago
Read 2 more answers
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