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I am not going to give you the answer that wld be too easy, but I will give you a website that I have referred my friends daughter to that has helped her greatly with algebra.
Algebrahelp.com
Evaluate the following expression to 4*(12.25-4)/(9+2)
To evaluate the expression (4x10^4)(2x10^5), you first multiply the numbers 4 and 2 to get 8. Then, you multiply the powers of 10 by adding the exponents, which gives you 10^(4+5) = 10^9. Therefore, the final answer is 8x10^9.
15 - sqrt(36) = 15 - 6 = 9
You evaluate the powers of 10 and a exponent of positive 4.
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