Answer:
x=7
Step-by-step explanation:
Equate the angles 7x-7 and 4x+14 and solve:
7x-7 = 4x+14
7x-4x = 14+7
3x = 21
x = 7
Answer:
increasing straight line not passing through origin
Answer:
3 boxes
Step-by-step explanation:
because 3 times 9 is 27.
Answer:
y<1
Step-by-step explanation:
Her brother is 9.
Because she is 3 years older than half his age, subtract 3 - 21. This gives 18. Then divide 18 / 2. This gives 9.