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hoa [83]
3 years ago
12

Please help im using all my points!!​

Mathematics
1 answer:
adoni [48]3 years ago
5 0
If the start temperature is t°C, and the temperature after 1 hour is t^2°C, we already know the equation to use to find the after temperature from the start temperature, which is t•t or t^2, so to find what the start temp is from the temp after 1 hour we reverse it to find the square root. So we find the square root of 81, which is 9, we have our answer.
t=9 so thats our answer!
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5. If W(-10, 4), X(-3,-1), and Y(-5, 11) classify AWXY by its sides. Show all work to justify your
Ierofanga [76]

Answer:

  an isosceles right triangle

Step-by-step explanation:

The square of the length of a side can be found from the distance formula:

  d^2 = (x2-x1)^2 +(y2-y1)^2

The square of the length of WX is ...

  WX^2 = (-3-(-10))^2 +(-1-4)^2 = 49+25 = 74

The square of the length of XY is ...

  XY^2 = (-5-(-3))^2 +(11-(-1))^2 = 4 +144 = 148

The square of the length of YW is ...

  YW^2 = (-10-(-5))^2 +(4 -11)^2 = 25 +49 = 74

The sum of the squares of the short sides is equal to the square of the long side, so this is a right triangle. The squares of the short sides are equal, so this is an isosceles right triangle.

3 0
3 years ago
What is the measurement of Angle x. please explain​
ki77a [65]
The measurement of angle x is 40°. these two triangle are congruent so their sides share the same length and their angles share the same degrees
3 0
3 years ago
Read 2 more answers
A Union worker is to see an increase in pay of 2.5% per year next year. Her salary is $41,000/yr. If inflation was predicted to
Fed [463]

Answer:

i need points rq thanks so much

Step-by-step explanation:

imma go waste these points now

8 0
3 years ago
The ends of a pipe when measured with a tape measure that has marks every millimeter are exactly at the 0 mark and the 15 meter
exis [7]
If the ends span from the 0 to the 15 meter mark, then the length of the pipe is 15 meters. However, you should report it using the right amount of significant figures. It is mentioned in the problem that millimeter marks are calibrated between meters. Since millimeter is 1/1000 of a meter, you should add three decimal places to the 15 meters. Hence, you should report it as 15.000 meters.
3 0
4 years ago
Workers Inc. just bought 14 boxes of pens to put in their storage room for employees to use as needed. Each box contains 45 pens
Igoryamba
14x45=630
43×2=86
(14×45)-(43×2)= 630-86=544
there would be 544 pens left
3 0
3 years ago
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