Answer:
-380
Step-by-step explanation:
7 - 9(8 + 5f)
7 - 9(8 + 5(7))
7 - 9(8 + 35)
7 - 9(43)
7 - 387
-380
Best of Luck!
Answer:
<u>B. 1/2 and 1.</u>
Step-by-step explanation:
The coefficient of a variable is the number that the variable is being multiplied for. In this example. We can see that x² is being multiplied by 1/2, therefore <u>1/2 is one of the coefficients</u>.
In the case of x, it doesn't have a number before it, it means that it's being multiplied by 1. Hence, our <u>second coefficient is 1</u>.
27% probability both husband and wife will be hired
3x + 4y = 5
2x - 5y = 8
To answer this question, we need to put both of these equations into Slope-Intercept form, or in other words, solve for y.
3x + 4y = 5 Subtract 3x from both sides
4y = -3x + 5 Divide both sides by 4
y =

+

2x - 5y = 8 Subtract 2x from both sides
-5y = -2x + 8 Divide both sides by -5
y =

-

When you look at the two equations, you can see that their slopes are completely different, so they aren't parallel, or inconsistent. Since

is not the same as<span>

, they aren't the same line, or dependent. So, the only option left is that they are
consistent and independent.</span>
9514 1404 393
Answer:
$67,200
Step-by-step explanation:
The amount if interest is given by the formula ...
I = Prt
where P is the amount invested, r is the annual rate, and t is the number of years. Here, we want to find P when r = 0.05 and t = 1/2 such that I = 1680.
P = I/(rt) = $1680/(0.05·0.5) = $1680/0.025
P = $67,200
The amount invested was $67,200.