Answer for the first question:
Answer for the second question:
Answer:
see explanation
Step-by-step explanation:
In 13 - 17
Consider the factors of the constant term which sum to give the coefficient of the x- term
13
x² - x - 42 = (x - 7)(x + 6)
15
x² + x - 6 = (x + 3)(x - 2)
17
x² - 27x + 50 = (x - 25)(x - 2)
19
r² - 25 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b) , thus
r² - 25
= r² - 5² = (r - 5)(r + 5)
Y = 6
5y = 5 x y
5y = 5 x 6
5y = 30.
It is C. 30.
Hope This Helps You!
Good Luck Studying :)
Answer:
x = -1
x = 3
Step-by-step explanation:
Add 1 to both sides:
Factor the left side:
Square root both sides:
Therefore:
Answer:
p=8
n=3
Step-by-step explanation:
let number of pennies=p
number of nickels=n
p+n=11
n=11-p
1*p+5*n=23
p+5(11-p)=23
p+55-5p=23
55-4p=23
4p=55-23=32
p=32/4=8
n=11-8=3
