Solving Simple Systems by Substitution or Elimination
(7.3) Solve
y=3x and 4x+y=49
(7,21)
(8.1) Simplify
x^3x^5
x^8
(8.3) Express in scientific notations
0.000052
5.2 x 10^-5
(9.1) State the degree of each term
1492
0
(10.4) Identify the perfect square trinomials by writing "yes" or no.
x^2 + 6x + 9
yes
(7.3) Solve
y=3x+2y and y=5x-6
(4,14)
(8.1) Simplify
3w^3 x 4w^4
12w^7
(8.3) Express in scientific notations
235.6 x 10^-4
2.356 x 10^-2
(9.1) State the degree of each term
4x^5y^2
7
(10.4) Identify the perfect square trinomials by writing "yes" or no.
x^2y - 8xy + 16y^2
no
(7.3) Solve
a-b=5 and a+b=11
(8,3)
(8.1) Simplify
2a^2(-5b^3)
-10a^2b^3
(8.3) Express in standard notations
2.54 x 10^8
254,000,000
(9.1)Write the Polynomial in standard form
3x+5-2x^2
-2x^2+3x+5
(10.4)Factor
a^2-225b^2
(13-15b)(a + 15b)
(7.4) Solve
x+y=5 and x-y=-3
(1,4)
(8.1) Simplify
4abc(-3a^3bc)
-12a^4b^2c^2
(8.3) simplify, Express in scientific notations
(2 x 10^2)(3 x 10^5)
6 x 10^7
(9.1)Write the Polynomial in standard form and state the degree
2xy - 7x^2y + 6x^4
6x^4 - 7x^2y+2xy, a degree of 4
(10.4)Factor
16x^2 - 4
4(2x - 1)(2x + 1)
x-y=-2 and 6x+y=-19
(-3,-1)
(8.1) Simplify
(-3x^3y^2z)^2(-5x^3yz^6)
-45x^9y^3z^22
(8.3) simplify, Express in scientific notations
(4x10^11) / (8 x 10^4)
5 x 10^3
(9.1) Evaluate
X^2 + x + 1 when x=11
133
(10.4)Factor
162a^2b^4c - 18b^4c
18b^4c(3a - 1)(3a + 1)