Answer:
210
Step-by-step explanation:
you can do 200 + 10 = 210
You can also do 200 + 1 x10
Answer:

Step-by-step explanation:
Simplify the equation 

Since

and

we have

Answer:
5t+3
Step-by-step explanation:
1 Collect like terms.
(7t-2t)+3
2 Simplify.
5t+3
Answer:
<u>3.4</u>
Step-by-step explanation:
Converting all terms to multiples of 10³ :
- 4 × 10² + 3 × 10³
- 0.4 x 10³ + 3 x 10³
- (0.4 + 3) × 10³
- <u>3.4</u> × 10³
7.1 is the correct answer. the closer the number is to the whole number is the correct answer.