Answer= x^2-4
I hope this helps.
Answer:
Step-by-step explanation:
3ab + 7a² + 2b² - (7a² - 4ab + 2b²) = 3ab + 7a² + 2b² - 7a² + 4ab - 2b²
Now combine like term. Like terms have same variable with same power.
= <u>3ab + 4ab</u> <u>+ 7a² - 7a²</u> + <u>2b² - 2b²</u>
= 7ab
Answer: 7
Step-by-step explanation:
Given : The recommended daily allowance for vitamin c is 60 mg per day .
Then, for one whole week , the recommended allowance for vitamin c will be :-

Also, there are 70 mg of vitamin C per 100 g orange.
1 g = 1000 ml
The proportion of Vitamin C in 100 g = 
1 oz =28.3495 grams
Then, 
Then, amount of vitamin C in 85048.5 mg = 
Then, the number of oranges have to eat each week to meet this requirement= 
Hence, about 7 oranges you would have to eat each week to meet this requirement.
Answer:
3
Step-by-step explanation: