MATHEMATICS HIGH SCHOOL

Sara borrows $56 from her mother to buy a new pair of jeans. If she decreases her debt by $4 each week, how many weeks will it take her to pay off the whole amount she owes her mother? A. 15 weeks B. 16 weeks C. 12 weeks D. 14 weeks

Answers

Answer 1

Answer:

D. 14 weekend

Step-by-step explanation:

4x = 56

x = 56/4

14 weeks

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What is the rate of change of y with respect to x in 2x - 3y = 6?

Answers

$2x-3y=6\n \n 3y=2x-6\n \n \frac { 1 }{ 3 } \cdot 3y=\frac { 1 }{ 3 } \left( 2x-6 \right) \n \n y=\frac { 2 }{ 3 } x-\frac { 6 }{ 3 } \n \n y=\frac { 2 }{ 3 } x-2\n \n \therefore \quad \frac { dy }{ dx } =\frac { 2 }{ 3 }$

This is because:

$y=k{ x }^( n )\n \n \frac { dy }{ dx } =kn{ x }^( n-1 )$

And also because when you differentiate a constant (i.e the number 2), what you always get is the value 0.

Multiply.

–58.7 • 13

Divide.

-6 ÷ 1/4

Answers

The first one is -763.1 and the second one is -24

An article was sold for rs 5500 with a profit of 10 % what is its cost price ?

Answers

Answer:

Given : Selling price of an article = Rs 5500. Profit = 10% Find the cost price of an article :- C.P = (S.P × 100)/(100 + Profit)

Use elimination to solve this system of equations. X-4y=-11 and 5x-7y=-10

Answers

x-4y=-11<=> -5x + 20y = 55
5x - 7y = -10
=>0*x + 13*y = 45 => y =45/13 => x = 4*(45/13) -11 = 180/13 -11 =>
x = 37/13;

There are 6 red marbles, 3 blue marbles, and 7 yellow marbles, find the probability of selecting a blue marble

Answers

The probability for selecting a blue marble would be 3/16.

A store offers a 15% discount on a skirt. If Bernice pays $40.80 for the skirt, what was the list price of the skirt before the discount? $61.00

Answers

The answer to this question is: x=48

Answer: 48

Step-by-step explanation:

Did the test got it right

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