MATHEMATICS HIGH SCHOOL

Calculate the total cost of an item bought at a negotiated price of $15,640 and a $2,500 trade-in allowance. The sales tax is 7.2 with a $106 registration fee.$13,160
$14,372.08
$1,232.08
$14,286.08

Answers

Answer 1
Answer: 15,640 * 7.2% = 1,126.80 Sales tax

Total cost:
cost of an item: 15,640 - 2,500 = 13,140.00
sales tax                                         1,126.80
registration fee                                   106.00
                                                     14,372.80   2nd option.

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What is the point-slope form of a line with slope that contains the point (-3, 6)?

Answers

Answer: y-6=2/5(x+3)

Step-by-step explanation:

Add the slope next time 2/5

point slope
y-y1=m(x-x1)
where you are given the point (x1,y1) and the slope is m

we are given the point (-3,6)
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Suppose you got 8 mangoes and 3 apples for $18 and 3 mangoes and 5 apples for $14.50.How many does each mango and each apple cost?

Answers

m = mangoes
a = apples

8m + 3a = 18               Equation 1
3m + 5a = 14.50          Equation 2
Lets multiply equation 1 by 5 and equation 2 by 3
The new equations are:
45m + 15a = 90
9m   + 15a = 43.5

Subtract them and get:
36m = 46.5
m     = 1.30     Divide both sides by 36

Substitute m into equation 2 (either is fine, but choose the easier one)
3(1.30) + 5a = 14.5
3.9     + 5a  = 14.6        Expand the bracket
5a = 10.6                      Minus both sides by 3.9
a   = 2.12                      Divide both sides by 5

Mangoes cost $1.30
Apples cost $2.12 (more like $2.10)

I feel that my working out is wrong, but that is how you work out the answer.

In the quadratic equation x2 - 8x + a = 0; what is the value, a, in order to form a perfect square?A) 8
B) 16
C) 32
D) 64

Answers

The answer is D.

x² - 8x + 64 = 0
        (x - 8)² = 0
            x - 8 = 0
              + 8 + 8
                 x = 8

Answer:

That's wrong the answer was B) 16

Step-by-step explanation:

Variable y varies directly with variable x, and y = 16 when x = 12. Enter the constant of variation in lowest terms.

y = blank/ blank x

Answers

y=kx
find k
y=16
x=12
16=k12
divide 12
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y=4/3x

blanks is 4/3

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Answers

rise over run
aka
change in y over change in x

Answer:

rise over run fs

Step-by-step explanation:

An angle measuring (870n)° is in standard position. For which value of n will the terminal side fall along the positive portion of the y-axis?

Answers

An angle measuring (870n)° is in standard position.The value of n in which the terminal side falls along the positive portion of the y-axis would be 1. This is because the reference angle would fall on the second quadrant, which still denotes a positive portion of the y-axis.

Answer: n=3

Step-by-step explanation: took on edg
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