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Vitek1552 [10]
3 years ago
15

Valerie took out a loan to pay off some bills. She borrowed $1,200 at an annual interest rate of 9%. How much interest did she p

ay on the loan the first year?
$108
$120
$150
$162.50
Mathematics
1 answer:
forsale [732]3 years ago
5 0

Answer: 150

Step-by-step explanation: stuffs marshmello in your mouth until u drop !!!

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3x + 2y = 5 5x + 2y = 7 Based on the given system of equations, which of the following is not true? 2x = 2 8x = 12 4y = 4
weqwewe [10]
<h3>Answer:</h3>

8x = 12

<h3>Explanation:</h3>

Subtracting the first equation from the second, you get ...

... (5x +2y) -(3x +2y) = (7) -(5)

... 2x = 2 . . . . . the first answer choice is true

___

Multiplying this expression for x by 4, we get

... 8x = 8 . . . . . the second answer choice (8x=12) is false

___

Adding thee first equation to the second, you get ...

... (3x +2y) +(5x +2y) = (5) +(7)

... 8x +4y = 12

... 8 + 4y = 12 . . . . . . use the value of 8x just computed

... 4y = 4 . . . . . . . . . . subtract 8; the third answer choice is true

_____

<em>Alternate approaches</em>

In short, if you solve the system by any of the methods available, you find x=1 and y=1, so the second answer choice is clearly the correct one:

... 8x ≠ 12

By Cramer's method:

... x = (2·7-2·5)/(2·5-2·3) = 4/4 = 1

... y = (5·5-7·3)/4 = 4/4 = 1

By graphing, see attached.

By substitution (for 2y):

... 5x +(5-3x) =7 . . . . . using 2y=5-3x

... 2x = 2 . . . . . . subtract 5

... x = 1 . . . . . . . .divide by 2

... 5 -3·1 = 2y = 2 . . . . substitute x into the expression for 2y

... y = 1 . . . . . . . divide by 2

By matrix methods, see the second attachment. (x, y) = (1, 1), found in the rightmost column of the result.

6 0
3 years ago
If your mom only has half a gallon left will she make it to the nearest gas station 26 miles away
Svetach [21]

Answer:

Depends how much is half a gallon in her car

usally a car has 100+ space for gallons

if she has any less than 50 gallons max

she won’t make it

so she probley will if she has more than 26 gallons of gas at half a tank

7 0
2 years ago
Find the area of the trapezoid
daser333 [38]

Answer:

52√3 ft^2

Step-by-step explanation:

The area of a trapezoid is the average of the bases times the height

We have enough information to find these parts.

The average of the bases is 11+15 /2 =13

The height is 4√3

So the answer is 13 * 4√3 = 52√3

Please vote me for brainliest i really need it, i hope i helped you. :)

4 0
3 years ago
Which graph is the result of reflecting f(x) = One-fourth(8)x across the y-axis and then across the x-axis?
Murljashka [212]

Answer:

f(x) = -0.5x

Step-by-step explanation:

.25*8 = 2 which is really a slope of 2/1

place a negative in front flips it over the y axis and flipping the slope flips it over the x axis.

5 0
2 years ago
2.
Valentin [98]

Answer:

et55

Step-by-step explanation:

3 0
2 years ago
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