1. 2/8
2. 3/4
3. 1/3
4. 4/5
Answer:
6.375 x 10^3
Step-by-step explanation:
Topic: Numbers / Conversion to Standard Form
If you would like to understand on this conversion etc, you can check out my Instagram page (learntionary) where I post notes and mathematics tips. Thanks!
Sum means add, a number means x, and four means, uh, 4...
x+4. is what you're looking for
Let's solve your system by substitution.
2x−2y=−4;2x+y=11
Rewrite equations:
2x+y=11;2x−2y=−4
Step: Solve2x+y=11for y:
2x+y=11
2x+y+−2x=11+−2x(Add -2x to both sides)
y=−2x+11
Step: Substitute−2x+11foryin2x−2y=−4:
2x−2y=−4
2x−2(−2x+11)=−4
6x−22=−4(Simplify both sides of the equation)
6x−22+22=−4+22(Add 22 to both sides)
6x=18
6x/6 = 18/6
(Divide both sides by 6)
x=3
Step: Substitute3forxiny=−2x+11:
y=−2x+11
y=(−2)(3)+11
y=5(Simplify both sides of the equation)
Answer:
x=3 and y=5
