Answer:
y =8.7
Step-by-step explanation:
y + 8.5 = 17.2
Subtract 8.5 from each side
y +8.5-8.5 = 17.2 -8.5
y =8.7
Simple interest is $ 9
<em><u>Solution:</u></em>
Given that,
P = $ 400

T = 0.25 years
<em><u>The formula for simple interest is:</u></em>

Where,
I is the simple interest earned
R is the rate of interest in decimal
T is the number of years
<em><u>Substituting the values we get,</u></em>

Thus simple interest is $ 9
No solutions
if you substitute the equations into each other the x's and y's will cancel each other out and you will be left with 9=-6 which isn't true<span />
1/10 as a decimal would be 0.1. Now just add the 8 to it and it would be 8.1.
Answer:
D
Step-by-step explanation:
<u>The question is about multiplication of matrices</u>
Given matrix A as [6 -12]
[4 8]
if 1/2x= A
then x=2A
A={6 -12}
{4 8}
x=twice A or A +A
<u>solving for 2A</u>
2A=(2×6 2×-12)
(2×4 2×8)
2A= (12 -24)
(8 16)