Answer:
40
Step-by-step explanation:
negative times a negative equals a positive
Too solve for expanded form, write each number with value separately.
600,000,000 + 40,000,000 + 400,000 + 9,000 + 200 + 10 is your answer
hope this helps
Answer:
0.15
Step-by-step explanation:
Given expression
3 tenths- 3 twentieth
⇒
![=\frac{3}{10} -\frac{3}{20} \\=\frac{6}{20} -\frac{3}{20}\\=\frac{6-3}{20} \\=\frac{3}{20} \\=0.15](https://tex.z-dn.net/?f=%3D%5Cfrac%7B3%7D%7B10%7D%20-%5Cfrac%7B3%7D%7B20%7D%20%5C%5C%3D%5Cfrac%7B6%7D%7B20%7D%20-%5Cfrac%7B3%7D%7B20%7D%5C%5C%3D%5Cfrac%7B6-3%7D%7B20%7D%20%5C%5C%3D%5Cfrac%7B3%7D%7B20%7D%20%5C%5C%3D0.15)
Therefore value of given expression is 0.15
<span>-2x^2-x+7=0
Variable with the highest degree's (exponent) constant, -2 is a, next variable's constant, -1 is b, the constant or number without a variable, 7 is c
using substitution put the numbers into the formula
</span>(-b±√(b^(2)-4ac))/(a^(2))
(-(-1)±√((-1)^(2)-4(-2)(7))/((-2)^(2)) simplify
(1±√(1+56))/4
1±√(57)/4 is your answer