(c) Marlene invests $550 at a rate of 1.9% per year compound interest

Mathematics

2 answers:

Vesnalui [34]3 years ago

5 0

Answer:

663.90

Step-by-step explanation:

use a compound intrest calculator

GaryK [48]3 years ago

4 0

Answer:

$ 663.90

Step-by-step explanation:

Calculate the amount (A) using

A = P $(1+r)^{t}$

where P is the principal, r is rate of interest and t is time in years

Here P = $550, r = $\frac{1.9}{100}$ = 0.019 and t = 10 then

A = 550 $(1+0.019)^{10}$

= 550 $(1.019)^{10}$

= $ 663.90

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CAN SOMEONE PLEASE WRITE A EQUATION OF THIS LINE!!

serious [3.7K]

Answer (<u>assuming it can be in slope-intercept form)</u>:

y = -x - 1

Step-by-step explanation:

When knowing the slope of a line and its y-intercept, you can write an equation to represent it in slope-intercept form, or y = mx + b format. Substitute the m and b for real values.

1) First, find the slope of the equation, or m. Pick any two points from the line and substitute their x and y values into the slope formula, $m = \frac{y_2-y_1}{x_2-x_1}$ . I chose the points (0, -1) and (-1, 0):

$m = \frac{(0)-(-1)}{(-1)-(0)} \\m = \frac{0+1}{-1-0} \\m = \frac{1}{-1} \\m = -1$

Thus, the slope is -1.

2) Now, find the y-intercept, or b. The y-intercept of a line is the point at which the line crosses the y-axis. By reading the graph, we can see that the line intersects the y-axis at the point (0,-1), therefore that must be the y-intercept.

3) Now, substitute the found values into the y = mx + b formula. Substitute -1 for m and -1 for b:

$y = -x -1$