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ELEN [110]
3 years ago
7

6x+2y= 6x+2y= \,\,16 16 2x-2y= 2x−2y= \,\,32 32

Mathematics
1 answer:
Ivanshal [37]3 years ago
3 0

Answer:

x = 6, y = -8

Step-by-step explanation:

First we take the equations side by side and put them like this:

 6x + 2y = 16

+ 2x - 2y = 32

8x = 48

Then solve for x.

x = 6

Then insert x back into either equation

2(5) - 2y = 32

10 - 2y = 32

solve for y,

y = -10

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consider the line y=-5/2×+9 What is the slope of a line parallel to this line? What is the slope of line perpendicular to this l
MatroZZZ [7]
Answer:

Slope of the parallel line = -5/2

Slope of the perpendicular line = 2/5

Explanations:

The given equation of the line is:

y\text{ = }\frac{-5}{2}x\text{ + 9}

The slope-intercept form of the equation of a line is:

y = mx + c

where m is the slope of the line

and c is the y-intercept

Comparing this to the given equation

m = -5/2

c = 9

Note:

When two equations are parallel, they have equal slope

When two equations are perpendicular, the product of their slopes equals -1, that is slope of the perpendicular line = -1/m

The slope of the parallel line = -5/2

The slope of the perpendicular line = -1 ÷ (-5/2)

The slope of the perpendicular line = -1 x (-2/5)

The slope of the perpendicular line = 2 / 5

3 0
2 years ago
Jeffery babysits for 4 dollars per hour, he also works as a math tutor for 7 dollars per hour. He is only allowed to work 13 hou
Oksana_A [137]

Given:

Jeffery babysits for 4 dollars per hour and works as a math tutor for 7 dollars per hour.

He is only allowed to work 13 hours total per week.

He wants to make at least 65 dollars.

To find:

The system of inequalities to represent this situation.

Solution:

Let x be the number of hours he babysits per week and y be the number of hours h works as a math tutor.

He is only allowed to work 13 hours total per week.  It means sum of x and y must be less than or equal to 13.

x+y\leq 13

He wants to make at least 65 dollars. It means total earnings must be greater than or equal to 65.

4x+7y\geq 65

Number of hours can not be negative.

x\geq 0, y\geq 0.

Therefore, the required system of inequalities contains some equations,  x+y\leq 13,4x+7y\geq 65 and x, y\geq 0.

4 0
3 years ago
Find two rational numbers between 5/6 and 83/ 100 . Explain how you know (without using decimals)
kolbaska11 [484]

Answer:

998/1200 and 997/1200

Step-by-step explanation:

It’s hard to compare 5/6 and 83/100 in their current states. Let’s find a common denominator. Take 600. We know that this will work because both 6 and 100 go into it. Multiplying 5 by 100 and 83 by 6 to find the common denominator, we can compare them at 498/600 and 500/600. However, there is only one number (499/600) between them. Thus, we will multiply each number by 2/2, which is 1. Our numbers are then 996/1200 and 1000/1200. Two numbers between them are then 997/1200 and 998/1200

8 0
3 years ago
If the yuan is worth 6.58 to a US$, what would the price to a US$ be if the yuan changed to 6.25
Alina [70]
The correct question is

The local currency it gives is a total of 275 Yuan. <span>If the yuan is worth 6.58 to a US$, what would the price to a US$ be if the yuan changed to 6.25
The </span><span>options are A)$2.21 B)$2.50 C)$13.31 D)$41.79 E)$44.00

we know that 

</span><span>at the current exchange rate give (6.58)
</span>if 1 usd-----------------> 6.58 yuan
X usd------------------> 275 yuan
X=275/6.58------------> X=41.79 usd

at the current exchange rate give (6.25)
if 1 usd-----------------> 6.25 yuan
X usd------------------> 275 yuan
X=275/6.25------------> X=44 usd

so

the change in price in US$ would be [44-41.79]=US$2.21

the answer is the option 
A)$2.21


3 0
3 years ago
How do you know if lines are parallel?
seraphim [82]
They will have the same slope.
5 0
3 years ago
Read 2 more answers
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