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poizon [28]
3 years ago
7

Suppose ∠A is complementary to ∠B and ∠B is supplementary to ∠C. If m∠A is 21°, find m∠C. (Type number only) *

Mathematics
1 answer:
vivado [14]3 years ago
8 0
Measure of angle c is 111°
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An airplane flew 4 hours with a 25 mph tail wind. The return trip against the same wind took 5 hours. Find the speed of the airp
balu736 [363]

Answer:

r  = 225 Mil/h     speed of the airplane in still air

Step-by-step explanation:

Then:

d  is traveled distance   and r  the speed of the airplane in still air

so the first equation is for a 4 hours trip

as  d = v*t

d  =  4 *  ( r  + 25)    (1)          the speed of tail wind  (25 mil/h)

Second equation the trip back in 5 hours

d  =  5  * ( r  - 25 )    (2)

So we got a system of two equation and two unknown variables  d  and

r

We solve it by subtitution

from equation (1)     d  =  4r  + 100

plugging in equation 2

4r  + 100  = 5r -  125    ⇒   -r  =  -225     ⇒    r  = 225 Mil/h

And distance is :

d  =  4*r  +  100         ⇒ d  =  4 * ( 225)  +  100

d  =  900 +   100

d  = 1000 miles

6 0
3 years ago
How many tickets were sold after June 15th?
AysviL [449]

Answer: About 45.

Step-by-step explanation: There's always a pattern in these kinds of questions, you can see for 9th to 13th August, the number has always been  between 20 to 40. And since on 13th August the graph is on a rise again, it would be around 45. 90 is just not realistic considering there's only an increase of around 5-10 tickets every day.  

8 0
3 years ago
24 students in Christine's class are wearing tennis shoes there are 30 students in the class Christine says that 70% of the stud
saw5 [17]
No she not correct. 80% of the students are wearing tennis shoes
8 0
3 years ago
Hello I need help with question B and C
Tanzania [10]

Answer: a) 22.94 psi

               b) 5.93 X 10 --5

Step-by-step explanation:

a)The pressure at which will trigger a warning is

31 - 31*0.26 = 22.94 psi

b) The probability that that the TPMS will trigger warning at 22.94 psi, given that tire pressure has a normal distribution with average of 31 psi and standard deviation of 2 psi

where x = 22.94,

do not nothe rest

6 0
3 years ago
2 × 7/8 as a model how do I draw it as a model
White raven [17]
One way to do it is you can draw two sets of 7/8.


You can draw 8 tiles, and color in 7.

Draw that two times.

That’s one way, but that might not be the way you learned it.


Hope this helped anyways!
7 0
3 years ago
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