The percent decrease is 20%.
150 - 120 = 30
30 divided by 150 = 0.2
0.2 as a percent is 20
Old - New
Old
Answer:
b 129%
Step-by-step explanation:
Answer:
4.5
Step-by-step explanation:
9/5−(−2 7/10)=4.5
a) Radicand is 1/4
b) x= 4.5 or -2.5
<h3>What is quadratic equation?</h3>
A quadratic equation is a second-order polynomial equation in a single variable x ax²+bx+c=0. with a ≠ 0 .
Given equation is:
16x²-8x+1=0
Now,
(4x)²-2*4x*1 + (1)²=0
Using
(a+b)²= a² + 2ab + b²
So,
(4x)²-2*4x*1 + (1)² = (4x+1)²
x=1/4
b) 4x² - 8x - 45 = 0
Using discriminant method
D = √[(-8)² - 4(4)(-45)]
= √784
= 28
Now, x = (1/8)[8 +/- 28]
= (1/8)(36) = 4.5
or, x = (1/8)(-20)
= -2.5
Learn more about this concept here:
brainly.com/question/4480807
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