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2 years ago

The sum of a number and -3 is equal to -91.Find the number

Mathematics

1 answer:

larisa86 [58]2 years ago

7 0

The sum of -3 and a number equal to -91 is -88

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9x - 3y = -2<br> -3x + y = -3

morpeh [17]

Multiply 2nd equation by 3 and add to first
9x-3y=-2
<u>-9x+3y=-9 +</u>
0x+0y=-7

0=-7
false
no solution
these lines aer paraalell so no solution

6 0

2 years ago

Find the equation for the inverse of the relation <br> Y=2x+1

Naddik [55]

I thank the answer is 4

8 0

3 years ago

Please help me with this!!!

RSB [31]

The answer that you have is most likely right, since the grouping did not change.

4 0

2 years ago

Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle. She wrote an equation to find the number of bottles

yKpoI14uk [10]

Answer:

1.49x+1.25x=100

Step-by-step explanation:

5 0

2 years ago

Find the equation of the line that contains the given point and the given slope. Write the equation in slope-intercept form.

stealth61 [152]

The slope-point form of a line:

$y-y_0=m(x-x_0)$

The slope-intercept form of a line:

$y=mx+b$

$m=6,\ (4,\ 1)\to x_0=4,\ y_0=1$

Substitute

$y-1=6(x-4)\qquad|\text{use distributive property}\\\\y-1=6x-24\qquad|\text{add 1 to both sides}\\\\\boxed{y=6x-23}$

$m=-5,\ (6,\ -3)$

Substitute

$y-(-3)=-5(x-6)\qquad|\text{use distributive property}\\\\y+3=-5x+30\qquad|\text{subtract 5 from both sides}\\\\\boxed{y=-5x+24}$

$m=-\dfrac{1}{2},\ (-8,\ 2)\\\\y-2=-\dfrac{1}{2}(x-(-8))\\\\y-2=-\dfrac{1}{2}(x+8)\\\\y-2=-\dfrac{1}{2}x-4\qquad|\text{add 2 to both sides}\\\\\boxed{y=-\dfrac{1}{2}x-2}$

$m=0,\ (-7,\ -1)\\\\y-(-1)=0(x-(-7))\\\\y+1=0\qquad|\text{subtract 1 from both sides}\\\\\boxed{y=-1}$

3 0

2 years ago