Answer:
Its C and there are 6 purple balloons hope this helps :)
Step-by-step explanation:
The answer is 2.63 because if you divide 7.89 by 3 the answer is 2.63
Answer:
m = 0.257
Step-by-step explanation:
4.3 + 10m = 6.87 (subtract 4.3 from both sides)
10m = 6.87 - 4.3
10m = 2.57 (divide both sides by 10)
m = 2.57/10
m = 0.257
The answers are x = -1, 1, i√7/3, -i√7/3.
Solution:
Solving by making a u-substitution, we let u = x² and rewrite the equation in quadratic form.
9u² - 2u - 7 = 0
We can now solve the quadratic equation by factoring. We need two numbers whose sum is -2 and whose product is -7. In this case, it would have to be 7 and -1, considering the term 9u². Hence, we can also write our equation in the factored form
(u - 1)(9u + 7) = 0
Now we have a product of two expressions that is equal to zero, which means any u value that makes either (u - 1) or (9u + 7) zero will make their product zero.
u - 1 = 0 => u = 1
9u + 7 = 0 => u = -7/9
We substitute back x² = u to calculate for x.
u = 1 => x² = 1 => x = -1, 1
u = -7/9 => x² = -7/9 => x = i√7/3, -i√7/3
Therefore, the solutions are −1, 1, i√7/3, and -i√7/3.<span> </span>
FOIL is an ancronym to help you remember to multiply each term. basically it's for people who can't distribute good
anwya
FOIL stands tells you which terms to mulitply, you then add the results up
F=First terms
O=Outer terms
I=Inner terms
L=Last terms
so
(x-2)(x-3)
First: x times x =
Outer: x times -3=-3x
Inner: -2 times x=-2x
Last: -2 times -3=6
now add them all up
answer is the second option