+0

+1
70
2
+2077

Really need to get this done >.<

RainbowPanda  Sep 10, 2018
#1
+3270
+2

Hi, RP!

1. Subtracting -3n^2 from -7n^2, we get: $$-7n^2-(-3n^2)=-7n^2+3n^2=4n^2.$$

2. $$(-8x^4y^3)*(2x^5y^2)+7x^9y^5$$ , we can remove the parenthesis, then multiply, then add, to attain: $$-16x^9y^5+7x^9y^5=-9x^9y^5$$.

3. Again: $$(-4a^3b^2)^2*(3a^2b)=16a^6b^4*3a^2b=48a^8b^5.$$

4. $$5c^{-7}d^2*(-cd^2)^4$$ , simplify, apply the exponent rule, and finally: $$\frac{5d^{10}}{c^3}$$ . This might be wrong!!!!

5. $$\frac{18w^4x^9}{14w^5x^5}$$, division, subtract powers! So, $$\frac{18x^4}{14w}$$. Reduce it, to $$\frac{9x^4}{7w}.$$

6. $$\frac{15x^2y*-6x^7y}{(3xy)^2}$$, remove parenthesis and simplify to get: $$-10x^7$$ .

1. $$4n^2$$

2. $$-9x^9y^5$$

3. $$48a^8b^5$$

4. $$\frac{5d^{10}}{c^3}$$

5. $$\frac{9x^4}{7w}$$

6. $$-10x^7$$

tertre  Sep 10, 2018
#2
+2077
0

Thank you SO much!

RainbowPanda  Sep 10, 2018