Answer:
Your correct answer is -3
Explanation:
- 7/4 is the only simplified fraction for the fraction of 7/4. All you have to do is simplify 7/4 to the simplest form.
Hi there! You are subtracting a negative number, which is basically the same thing as adding, because two negatives make a positive. B and C is out, because they do not fit the expression. You are actually adding both numbers and anytime you have to subtract a negative number, you add. When you do basic math, 4 + 7 is 11. Both numbers are negative and D does not work, because you're adding from a negative number. The only answer choice that has the expression is A. The answer is A.
By rounding 842 to 800, she can multiply 800 by 3 to get 2,400.
then, multiply 40 by 3, you get 120 and add the two together to get 2,520
this shows her answer is not necessary reasonable
f(x) = x³ - 8x² + 22x - 20
given x = a, x = b are zeros of a polynomial then
(x - a) and (x - b) are factors and the polynomial is the product of the factors
f(x) = k(x - a)(x - b) → ( k is a multiplier )
note that complex zeros occur in conjugate pairs
3 + 1 is a zero then 3 - i is a zero
zeros are x = 2, x = 3 + i and x = 3 - i, thus
(x - 2 ),(x - (3 + i )) and (x - (3 - i )) are the factors
f(x) = (x - 2)(x - 3 - i )(x - 3 + i)
= (x - 2)(x² - 6x + 10)
= x³ - 8x² + 22x - 20
Answer:
there are 20 girls in the band
Step-by-step explanation:
let number of boys= x
let number of girls = 10+x
so
x+10+x=30
2x=30-10
2x=20
x=20/2
x=10....
so if x= 10 then number of boys=10
number of girls=10+10=20....
