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Alja [10]
3 years ago
13

Four students each made a list a of prime numbers.

Mathematics
2 answers:
Nataly_w [17]3 years ago
7 0
Jordan did because 21 is not a prime number.
Anuta_ua [19.1K]3 years ago
4 0
Jordan made the error because 21 is a composite number
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It took Brian 6 hours to drive to the sales conference. He took the same route on the way back home, but
g100num [7]

Answer:  54 mph

Step-by-step explanation:

d-the distance

s+9  -  the speed to the conference

d=6*(s+9)

s- is the speed on the way back home

d=7*s

so    6*(s+9)=7*s

       6s+54=7s

     -6s          -6s

       54= 7s-6s

       s=54  mph

6 0
3 years ago
Which one is greater 10.05 or 10.005
Blababa [14]
10.05 = 10 5/100 = 10 1/20
10.005 = 10 5/1000 = 10 1/200

therefore, 10.05 is greater then 10.005
8 0
3 years ago
Is y=1-x to the second power linear or nonlinear
Anastaziya [24]

Answer:

Non Linear

Step-by-step explanation:

Its non-linear because when you put X to the second power, it will change the function into a quadratic function

6 0
3 years ago
12. Find the value of x. (2 points - 1 point for equation, 1 point for answer)
Viktor [21]
Answer: x = 7

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

Angle STU is 15x. This is the exterior angle on the right side of the triangle
Subtract this from 180 to get angle RTS

angle RTS = 180 - (angle STU)
angle RTS = 180 - 15x

Focus solely on triangle RTS. If needed, erase the portion that extends out toward point U
If we focus on the triangle only, then angle R = angle T since they are the base angles of the isosceles triangle. We know that triangle RST is isosceles since RS = ST is given to us.

Because angle R = angle T, we know 
angle R = 180-15x
angle T = 180-15x
and we also know
angle S = 4x+2
since that's given as well

Add up the three angles and set that sum equal to 180. Then solve for x
R+S+T = 180
(180-15x)+(4x+2)+(180-15x) = 180
(-15x+4x-15x) + (180+2+180) = 180
-26x + 362 = 180
-26x + 362-362 = 180-362
-26x = -182
-26x/(-26) = -182/(-26)
x = 7
5 0
3 years ago
It took every 55 minutes to run a 10-meter race last weekend. If you know that 1 kilometer equals 0.621 mile, how many minutes d
Umnica [9.8K]
Velocity=distance/time
Data:distance=10 Km=10 km*(0.621 miles/1 km)=6.21 miles.time=55 minutes
Velocity=6.21 miles/55 minutes=0.11290909... miles/minute≈0.113 miles/ minute
Data: distance=1 mile.velocity=0.113 miles/minute
time=distance /velocitytime=(1 mile) / (0.113 miles/ minute)=8.85668... minutes≈8.86 minutes. 
Answer: D 8.86 minutes. 


7 0
3 years ago
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