Answer:
false is the correct answer of it if the answer going wrong sorry
She burns 250 by herself and she burns 3 times as many with her sister.
Multiply the calories by herself by 3:
250 x 3 = 750
Now you need to multiply that by the number of hours.
The formula is a. t[c(h)] = 750h
1/3 of 42 = 14 ( Alyanna)
4/7 of 42 = 24 ( Rose )
24+14= 38
42-38= 4
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![\cos(60) = \frac{12}{x} \\](https://tex.z-dn.net/?f=%20%5Ccos%2860%29%20%20%3D%20%20%5Cfrac%7B12%7D%7Bx%7D%20%20%5C%5C%20)
![\frac{1}{2} = \frac{12}{x} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B1%7D%7B2%7D%20%20%3D%20%20%5Cfrac%7B12%7D%7Bx%7D%20%20%5C%5C%20)
![x = 24](https://tex.z-dn.net/?f=x%20%3D%2024)
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![\sin(60) = \frac{y}{x} \\](https://tex.z-dn.net/?f=%20%5Csin%2860%29%20%20%3D%20%20%5Cfrac%7By%7D%7Bx%7D%20%20%5C%5C%20)
![\frac{ \sqrt{3} }{2} = \frac{y}{24} \\](https://tex.z-dn.net/?f=%20%5Cfrac%7B%20%5Csqrt%7B3%7D%20%7D%7B2%7D%20%20%3D%20%20%5Cfrac%7By%7D%7B24%7D%20%20%5C%5C%20)
![y = 12 \sqrt{3}](https://tex.z-dn.net/?f=y%20%3D%2012%20%5Csqrt%7B3%7D%20)
Answer:
a=7
Step-by-step explanation:
3a+4=a+18
-1a -1a
2a+4=18
-4 -4
2a = 14
÷2 ÷2
a=7