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Allisa [31]
3 years ago
8

Please explain how to do this, thank you.

Mathematics
1 answer:
Rzqust [24]3 years ago
4 0

The graph shows a parabola with vertex at (0,9). It opens down. This is sufficient info with which to write a quadratic equation for temperature as a function of time: T(t) = -t^2 + 9.


It happens that we want to know the times at which T=8 degrees F. To do this, set T(t) = -t^2 + 9 = to 8 and solve for t:


-t^2 + 9 = 8, or 1 = t^2., or 9 - t^2 = 8.


While we were not asked to find these times, doing so is easy: t = plus or minus 1.

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Is 0.4 over 0.8 a rational or irrational number
Rudik [331]
It is a rational number and it equals 0.5 or 1/2
5 0
3 years ago
ZA and ZB are supplementary angles. If mZA = (x + 6) and m
Ronch [10]

Answer:

za=24

Step-by-step explanation:

supplementary angles add up to equal 180

180=7x+x+30+6

step 1 combine like terms

180=8x+36

step 2 subtract 36 from each side

144=8x

step 3 divide each side by 8

x=18

now we just plug in 18 to x in x+6

18+6=24

4 0
3 years ago
Read 2 more answers
Am pls answer this sorry​
Komok [63]

Answer:

16. 1

17. 3

18. 1

19. 1

20. 1

Step-by-step explanation:

I'm sorry that I don't speak in Filipino but I can help fill in the blanks.

(In brackets is the English translation)

12 pulgada = 1 piye (12 inch is 1 foot)

1 yard = 3 piye (1 yard is 3 feet)

10 sentimetro = 1 desimetro (10 centimeters is 1 decimeter)

1000 metro = 1 kilometro (1000 meters is 1 kilometer)

10 millimetro = 1 sentimetro (10 millimeters is 1 centimeter)

3 0
3 years ago
IM SOO CONFUSEDD help???
lozanna [386]

Answer:

D.

Step-by-step explanation:

To tell whether the domains can include 0, all you need to do is find where x = 0, and whether the y-value is real.

h(x) = sqrt(2x^2 + 5x - 3)

= sqrt(0^2 + 5 * 0 - 3)

= sqrt(-3)

Since this includes the square root of a negative number, h(0) is an imaginary number. That means that we can eliminate choices A and B.

If you look at the graph of w(x), when x = 0, there is a real value for the y-value on the graph. But, if you think about it, if you have 0 workers, there is no way that you can still be producing wrenches. So, the domain cannot contain 0.

Your answer will be D.

Hope this helps!!

3 0
3 years ago
Side AB is 18, Side AC is 9, Side BC is 5. Find the SinA. Give your answer in fraction and decimal form.
Sladkaya [172]

Input data

In any right triangle, the sine of an angle x is the length of the opposite side (O) divided by the length of the hypotenuse (H). In a formula, it is written as 'sin' without the 'e':

\begin{gathered} \sin A=\frac{5}{18} \\ \sin A=0.277 \end{gathered}

7 0
1 year ago
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